Include urmatoarele articole� Degradation of alcian blue 8 gx by heterogeneous and homogeneous photocatalytic processes� Evaluating the performance of solid waste management models� Bioreactors with stirred bed of immobilized cells 1. Studies on mixing efficiency� Fugitive emissions estimation from petroleum storage tanks� New Ni(II) coordination polymers with insulating and anticorrosive properties� Determination of water quality deterioration at pilgrimage centre along river netrav...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25196

Contine urmatoarele articole:??Â?Â? Alternative energy sources in transition countries. The case of bioenergy in Ukraine??Â?Â? Catalytic destruction of aromatic VOCs on SCR-DeNOx commercial catalyst??Â?Â? Ecological Economics And Transport Systems??Â?Â? Bioleaching of uranyl ions from uranium ores by some algae??Â?Â? Irreversible affinity immobilization of lentil seedling??Â?Â? Evaluation of artificial neural network techniques for river flow forecasting??Â?Â? Hydrogen and sustainable energy. Re...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25194

River runoff forecasting is one of the most complex areas of research in hydrology because of the uncertainty of hydrological and meteorological parameters and scarcity of adequate records. Artificial neural networks (ANN) can be an efficient way of modelling stream flow processes as it is capable of controlling and modelling nonlinear and complex systems and does not require describing the complex nature of the hydrological processes. In this study, daily river flow is forecasted using two ANN ...
Autori: Cintia Bertacchi Uvo, Dimitri Namgaladze, George Gabitsinashvili
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25110

The environment is the relations in life and all settings life is consist of. A building is an artificial environment designed and built to meet the users' needs. These needs are fulfilled with the properties of building products that form the building. Building and building products are directly or indirectly in interaction with the environment during their life cycle process.There are some models like 'LEED', 'Athena', 'BEES', 'BRE', 'Analytica', 'Pre', 'GaBi', 'TEAM', 'GB Tool', 'Woolley','Cu...
Autori: Ayşe Balanlı, Gokce Tuna Taygun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25113

The great variety of available Solid Waste Management System (SWMS) models, along with a plethora of continuously developing technological advancements in the design and operation of the treatment facilities and collection and transport schemes, the continous updating of national (and/or European) regulations on waste management and the increased computer literacy and availability, renders the selection of a SWMS model a complex endeavor. From the view point of a municipality, the following ques...
Autori: Demetrios Panagiotakopoulos, Konstantinia Tsilemou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25115

The models describing the flow or the heat and mass transfer in stirred bioreactors can be easily adapted for the continuous phase from the stirred bed bioreactors. But, for the immobilized biocatalyst phase, new models have to be established. Therefore, in this paper the influences of the main factors on mixing for a bioreactor with stirred bed of S. cerevisiae immobilized cells in alginate have been analyzed.. The mixing efficiency continuously increases with rotation speed acceleration for th...
Autori: Anca-Irina Galaction, Anca-Marcela Lupasteanu, Dan Caşcaval
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25116

AbstractThis paper reviews some practical aspects of the application of algal biomass for the biosorption of heavy metals from wastewater. The ability of different algal species to remove metals varies with algal group and morphology, with the speciation of specific metals and their competition with others in wastewater, and with environmental or process factors. The scattered literature on the uptake of heavy metals by both living and dead algal biomass - both macroalgae and immobilized microal...
Autori: Loredana Branza, Maria Gavrilescu, Matthew J. Dring
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25133

Experiments in a Pilot Plant (PP) are extremely important and relevant for the substantiation of research. This is the way to set up the most suitable coagulation-flocculation reagents, optimum operating conditions (injection point, reaction times, etc.),compatibility with the processes at the actual Water Works and real possibilities for further improvement.The present work aimed at verifying the previously obtained results in laboratory under PP working conditions for optimizing the coagulatio...
Autori: Adina Pacala, Alina Anghelina, Dalila Marşavina, Ilie Vlaicu, Katalin Bodor, Mihaela Anghel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25156

The amperometric response in dynamic or fixed potential conditions, as cyclic voltammetry (CV) and chronoamperometry (CA) of a copper oxide-copper electrode was studied and proposed for the fast characterization of the simulated wastewaters containing acetylsalicylic acid (ASA) and sulfur compounds, i.e., thioacetamide (TA) as organic pollutant models. The additivity of the individual amperometric signals in the overall response of the electrode for mixed solutions corresponded to over 95% recov...
Autori: Aniela Pop, Ciprian Radovan, Florica Manea, Georgeta Burtica, Ilie Vlaicu, Joop Schoonman, Marcel Morariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25158

Contain all the articles from this issueICEEM/01 -- Environmental Engineering SectionThermodynamic and kinetic study of gas desulphurization by adsorption on zeolites  Ion Untea, Dan Brasoveanu, Madeleine Dancila, Szidonia Bocskor Mixed oxides derived from vanadium substituted layered double hydroxides as catalysts precursors for SO2 oxidationGabriela Carja, Ionel Popa, Gabriela Ciobanu, Nicolae Aelenei The impact of energy production on environment in RomaniaCarmen Zaharia, Mioara Sur...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25168

Contain all the articles from this issueICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Treatment Technologies for Gaseous Fluxes"Surface chemistry studies on molybdena–alumina catalystTatiana Yuzhakova, ?kos R?Šdey, Endre Domokos, J??zsef Kov??cs, Monica Caldararu, Cristian Hornoiu, Mariana Carata, G.Postole, Cornel Munteanu, Larisa Strukova, Jozse FazakasHebicidal behaviour of a new N,N'- biquaternary salt of 4,4'- bipyridineServilia Oancea, Marinela Irimia, Gabriela Carja, Anton Airinei, Nicu...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25189

? Kinetics considerations concerning the oxidative degradation by photo-fenton process of some antibiotics ? Catalytic wet hydrogen peroxide oxidation of 4-chlorophenol over iron-exchanged clays ? Researches on the negative effects assessment (slugging, clogging, ash deposits) developed at the biomass-coal co-firing ? Contribution to the study of the environmental heritage of a former chemical plant ? Impact of chemicals on derivatives with important therapeutic activity in C...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25376

Iinclude urmatoarele articole:â€? Phenol degradation in water through a heterogeneous photo-fenton processâ€? Study concerning the influence of oxidizing agents on heterogeneous photocatalytic degradation of persistent organic pollutantsâ€? Nonmarket valuation of acequias: Stakeholder analysisâ€? Metals concentration in soils adjacent to waste depositsâ€? Polyelectrolyte - surfactant complexesâ€? Modelling of sorption equilibrium of Cr(vi) on isomorphic substituted Mg/Zn-Al - type hydrotalcitesâ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25206

Include urmatoarele articole:� "Waste not, want not" a study of household attitude toward recycling of solid wastes� A kinetic model for the crystal violet mineralization in water by the electro- fenton process� Development of a coagulation/flocculation predictive model for turbidity removal from tehran water treatment plants� Removal of cadmium (II) from aqueous solutions by sphagnum moss peat: Equilibrium study� Environmental sustainability based on fuzzy models� Impact of dust emi...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25207

Include urmatoarele articole:� Cost sensitivity analysis by Monte Carlo simulation� Mathematical modeling of gas drying by adsorption� Methyl isobutyl ketone combustion over Pt/Al2O3 catalyst� Distribution of oxygen transfer rate in stirred bioreactors with simulated broths� Unsteady heat transfer inside an elliptic cylinder� Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studies� Sustainable combined utilization of renewable forest resources and coal in Roma...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25209

AbstractA new photo-Fenton catalyst has been manufactured from synthetic layered clay laponite (Laponite RD) by the pillaring technique Eight different catalyst samples were prepared: four without thermal aging (WTA) calcined at 523 0K, 623 0K, 723 0K and 8230 K, and other four with thermal aging (TA) calcined at the same temperatures. The activity of the TA- 623 sample was evaluated in the phenol degradation by the photo - Fenton process. The influence of five important operating factors has be...
Autori: Beatrice Iurascu, Ilie Siminiceanu, Miguel Vincente
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25210

AbstractThe absorption of CO2 into an aqueous solution with 1.45 mol/L 1,5,8,12-tetraazadodecane (APEDA) polyamine has been studied at three temperature (298, 313, 333 K) in a Lewis type absorber with a constant gas-liquid interface area of (15.34 Âą 0.05) x 10-4 m2. The experimental results have been interpreted using the equations derived from the two film model with the assumption that the absorption occurred in the fast pseudo- first- order kinetic regime. The results confirmed the validity ...
Autori: Chakib Bouallou, Ilie Siminiceanu, Ramona-Elena Tataru-Farmus
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25223

AbstractThis work presents the state of the art of qualitative and quantitative risk assessment methodologies in a variety of fields. Because risk exists in all ranges of human activity, both private and professional, risk assessment is an attempt to analyze precipitating causes of risk in order to more efficiently reduce its probability and effects. Numerous methodological guidelines within the field of environmental science exist to provide guidance for a risk assessment program, although the ...
Autori: , , Florentina Anca Căliman, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25226

AbstractThe mineralization of acidic aqueous solutions with 0.166 to 1.333 mM Crystal Violet (CV) in 50 mM Na2SO4 as background electrolyte has been studied by the electro- Fenton method, where the oxidizing hydroxyl radicals were produced from the Fenton reaction between added ferrous ions and hydrogen peroxide generated at a oxygen- diffusion cathode. The influence of a new operating factor on the mineralization degree has been investigated: anode material (platinum versus boron doped diamond)...
Autori: Carmen-Ionela Alexandru, Eric Brillas, Ilie Siminiceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25229

AbstractEnvironmental pollution has become much more of a problem in recent years than it has been in the past. Pollution caused by garbage disposal, toxic substances sloping from different sources has attracted a great deal of attention and can be a great inconvenient for the environment and for the people. In the face of growing social expectations encompassing both standards of living and environmental concerns, the idea of sustainable development has become popular among governments, industr...
Autori: , Marius Paslaru,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25232

AbstractThe removal of formasine fines particles from water by precipitation with polyelectrolyte and surfactant complex of Polyacrylamide (industrial product Praestol 611 made by Degussa) and Sodium Lauryl Sulphate (SLS) was experimentally studied. Calcium oxide was added to initiate precipitation of the polyelectrolyte complex together with the fines particles. The experiments were carried out with complexes having the surfactants concentration higher then the critical aggregation concentratio...
Autori: Cristina Costache, Gabriel Dabija, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25238

AbstractWith a greater emphasis on the increasing number of diesel vehicles provided with pollution control systems complying to regulatory standards these days than ever before, it is also necessary to look into the emission characteristics of the diesel vehicles with respect to vehicle-related parameters with a view to ascertain as to how the tail pipe emission from the diesel vehicles could be kept under control by adopting suitable strategies. Considering the constraints of data collection a...
Autori: Manoranjan Parida, Mishra Rajeev Kumar, Pandey Govind
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25248

AbstractTogether with other public utilities, water supply systems management aims to provide an efficient operation of the system and lower operational costs. In complex water distribution systems there is a large variety of consumers, which differ from one another not only by values of inflows, but also by how this inflows vary from hour to hour. This paper presents a self-organizing based approach to the problem of classification of water consumption profiles from the nodes of a water distrib...
Autori: Gilda Gavrilaş, Mihai Gavrilas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25254

AbstractEquilibrium and kinetic studies regarding the sorption of the copper phtalocyanine dye Alcian Blue 8 GX were carried-out within batch experiments. The sorption equilibrium revealed that the pure natural clay can uptake up to 18 mg of Alcian Blue 8 GX per 1 g mass of clay. The cationic dye sorption was best fitted by Freundlich model that is applicable to sorption on heterogeneous surfaces (surfaces with non-equivalent energetic sites). The pseudo-second order kinetic model may be efficie...
Autori: , Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25257

AbstractCatalytic combustion of methyl isobutyl ketone in diluted air streams over Pt/Al2O3 commercial catalyst was experimentally investigated. The experiments were carried out at space velocities between 180 000 - 600 000 cm3/ (gcat¡h) and ketone concentrations in the range of 900 - 2600 ppmv. On the studied domain of working parameters, carbon monoxide was not detected, although some organic intermediates were formed (especially acetic acid). Their presence was detected in the product mixtur...
Autori: Anamaria Soare, Cristina Gheorghiu, Grigore Bozga, Magdalena Boşomoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25271

AbstractTheoretical and experimental studies of gas drying processes by adsorption in fixed bed of grains are presented in this paper. Based on an extensive literature study, some of the most representative mathematical models describing gas adsorption in fixed bed and consequently gas drying processes by adsorption in fixed bed are also presented. Using a mathematical model from those mentioned describing adsorption under isotherm regime, the temperature and gas flow velocity effects over the d...
Autori: Marius Sebastian Secula, Stelian Petrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25272

AbstractIn the theory of relations between economical branches, a variety of balance of connections between the branches (BLR) models is used, whose theoretical construction is based on a series of hypotheses according to the purpose of each model. In this paper models which make use of the natural units are applied in the analysis of fluxes between industrial branches. ...
Autori: Aurel Burciu, Ionel Bostan, Petru P. Condrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25277

AbstractIn India, transportation sector is growing fast and the number of vehicles on Indian roads is increasing at a rate more than 7 percent a year. During the period of 50 years from 1951 to 2001, the number of vehicles has increased from 0.3 million to 43 million i.e. an increase of almost 143 times. This has led to overcrowded roads and noise pollution. The transportation sector is one of the major contributors to noise in urban areas, accounting to as much as 55 percent of total noise on t...
Autori: Arvind Kumar Shukla, Jyoti Bhushan Srivastava, Manoranjan Parida, Sukhvir Singh Jain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25279

AbstractThe paper approaches studies of projections of future climate change that use a hierarchy of coupled ocean/atmosphere/seaice/ land-surface models to provide indicators of global response as well as possible regional patterns of climate change. It is evidenced that, after the global warming, a new phenomenon that occurs in the terrestrial atmosphere has drawn the attention of the scientific community. It is called global dimming - the decrease of the solar beams capacity (infrared, visibl...
Autori: Catrinel-Raluca Giurma-Handley, Constantin-Marin Antohi, Ioan Crăciun, Ion Giurma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25285

AbstractThe corrosion resistance of three types of low-carbon steels in water-contaminated mixtures of adipic acid and methanol was investigated. The concentration of water in the organic mixture was progressively raised from 1% to 5%, while the carbon concentration in the steel samples varied from 2% to 4%. Infrared spectroscopy (IR) and X-ray diffraction (XRD) were used to investigate the insoluble corrosion products. Based on the weight losses measurements, on the polarization curves and on t...
Autori: Adrian Cailean, Daniel Mareci, Daniel Sutiman, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25287

? Denitrifying activity of activated sludge in suspension and in biofilm? Denitrifying potential of an activated sludge derived consortium? Biosorption of hexavalent chromium based on modified Y zeolites obtained by alkali-treatment? Identifying anaerobic digestion models using simultaneous batch experiments? Olive mill wastewater as a renewable resource? Influence of innoculum acclimation in the biodegradation rate and estimated biodegradbility of cow manure, food waste and oil? Studies on the ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25378

AbstractThe paper proposes a suitable solution for a one step treatment process of the wastewaters resulted from the textile industry, using a mixture of anatase and modified fly ash. The dyes photo-degradation on TiO2 anatase is well known. The use of fly ash in advanced wastewater treatment, for heavy metal adsorption, represents an environmental friendly process, efficient if the fly ash surface charge is controlled by solubilisation/reprecipitation. The first step in implementing the single ...
Autori: Anca Duta, Maria Visa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25292

AbstractBiosorption an alternative process is the uptake of heavy metals from aqueous solutions by biological materials. The biosorption of nickel ions from aqueous solution was investigated by Nordmann fir (Abies nordmanniana (Stev.) Spach. subsp. nordmanniana) in a batch adsorption system as a function of pH, initial metal concentration, biomass dosage, contact time. The data showed that the maximum pH for efficient sorption of Ni(II) was 6.5. At the optimal conditions, Ni(II) ion biosorption ...
Autori: Handan Ucun, Ozkan Aksakal, Yusuf Kaya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25295

Include urmatoarele articole:� Removal of nickel from aqueous solution by Nordmann FIR (ABIES Nordmanniana (STEV.) SPACH SUBSP. Nordmanniana) cones� Determination of heavy metals in extracts and macerates from garden flowers� Biological phosphorus removal in a high performance single reactor � Advanced Cd2+ removal on dispersed TioO2-fly ash � Remediation techniques for contaminated soils� Separation of uranium(vi) from soils by extraction in aqueous PEG (1550) - Na2SO4 - Na2CO3 two-...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25296

AbstractThe sorption of Pb(II) and Hg(II) ions from aqueous solutions by moss peat (from Poiana Stampei, Romania) was studied in a batch system. The data obtained from experiments of a single-component sorption were analyzed using Langmuir and Freundlich models. The Langmuir equation describe sorption isotherm of Pb(II) and Hg(II) with high correlation coefficients, and better than Freundlich model. According to the Langmuir model, the maximum uptake capacities of moss peat for Pb(II) and Hg(II)...
Autori: Dumitru Bulgariu, Laura Bulgariu, Matei Macoveanu, Mioara Răţoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25311

AbstractThe paper defines the average and local soil storage coefficients, for a soil with relatively shallow water table. By means of an adequate law for the suction distribution on soils level and certain parametrical models for the moisture retention curve of soil, the analytical equations for these storage coefficients were determined. Theoretical results are to be applied for a case study and on the basis of a pertinent analysis, and some recommendations were made for the practical use of f...
Autori: Daniel Toma, Esmeralda Chiorescu, Stefan Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25319

AbstractConsidering that the fate and behaviour of contaminants within the environment is an extremely complex issue, this paper analyzes the development of predictive models which can contribute to the understanding of the release of a contaminant.  Different types of models concerning the atmospheric transport of POPs are examined, taking into consideration that these models can be used to simulate the behaviour of contaminants. A successful simulation, in which there is satisfactory agre...
Autori: Camelia Smaranda, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25327

- Artificial intelligence applications in the atmospheric environment: status and future trends- Kernel methods and neural networks for water resources management- Environmental decision support systems based on models and model-based reasoning- Towards an intelligent tutoring system for environmental decision makers- SBC-MEDIU: A multi-expert system for environmental diagnosis- Fast and accurate residential fire detection using wireless sensor networks- Validation of a knowledge-based risk mode...
Autori: http://www.ecozone.ro/reviste.php?RID=25377

AbstractIntegrated water resources management requires planning and management activities, as well as adequate information and communication within a structure that groups different stakeholders (industry, agriculture and other types of water users, civil society representatives, university and research institutions, water authorities and waterworks companies), being thus characterized by a high level of complexity, and requiring the involvement of numerous decision-makers operating at different...
Autori: , , Luminita Lupu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25344

AbstractThe present work carries out a parallel analysis between the performances and, on the other hand, of the restrictions of two different model systems designed to assess the nearshore circulation. These are SHORECIRC, which is a widely known general prediction system for nearshore circulation and ISSM (the Interface for SWAN and SURF Models). SHORECIRC is a quasi-3D model that combines a numerical solution for the depth-integrated 2D horizontal momentum balance equations with an analytical...
Autori: Eugen Rusu, Silviu Macuţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25345

AbstractIn the present article, some models conceptually and mathematically applicable to the LNAPL transitory transport process through ground water were discussed. Subsequently, by using a personal computer program of pre-processing basis data combined with MOVER 2.0, the levigation process of oily dross/scale stored in the waste dump, which produces steel rolled tubes, was numerically simulated, in adequate scenarios. The results of the simulations will be useful at the evaluation of the impa...
Autori: Elena Doinita Carlig, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25361

Include urmatoarele articole:� Environmental Engineering and Management Journal, Vol. 8 Nr. 2� Bioengineering aspects of tissues culture bioreactors for medicine and environmental applications� Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradation� A novel plasma reactor for toluene decomposition in contaminated air flow� Study of the copper (II) removal from aqueous solutions by chelating resin Purolite S930 � Analysis of some metal levels...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25371

� Physiological changes in seedling germination and growth plant under chemical stress conditions� Studies on sorption and transport processes of cadmium in soils� Assessment of the anthropogenic impact on water systems by fluorescence spectroscopy� Research on the effects of soil improvement by fertilization on the quality of winter wheat� Halotherapy: From ethnoscience to scientific explanations� Study regarding the sorption of erythrosine from aqueous solution onto soil� Hydroxy...
Autori:
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25375

AbstractThe lead(II) ions sorption from aqueous solutions on three types of peat from Poiana Stampei (Romania) was studied. The peat was drawing from different deeps, such as 5-10 cm deep (peat 1), 0.5-1.0 m deep (peat 2) and from > 1.5 m deep (peat 3). The influence of several experimental parameters (initial lead concentration, contact time) was studied in batch experiments. The kinetics of sorption was followed based on the amount of lead(II) ions retained at various time intervals. The re...
Autori: Laura Bulgariu, Mioara Răţoi, Dumitru Bulgariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25389

AbstractThe adsorption characteristics of n-hexane vapors from gaseous stream onto two types of hypercrosslinked polymeric resins (MN 202 and MN 250), and a bituminous granular activated carbon (AC 20) was investigated. The n-hexane influent concentration ranged from 2100 to 4500 ppm and the adsorption processes were performed at 30, 40 and 50 ?C. Thermodynamic potentials ?H, ?S, and ?G and isosteric heats of adsorption were calculated from experiment performed at different temperatures (30-50?C...
Autori: Adela Marilena Buburuzan, Cezar Catrinescu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25393

AbstractEquilibrium data of water vapor adsorption from wet air on several materials were experimentally determined at temperature values of 313 and 333 K and air relative humidity values ranged between 30 and 90 %. Experimental data were correlated with Langmuir and Freundlich models. The obtained results emphasize the significant difference between the water retained on the adsorbent materials impregnated with various salt solutions, and on classic adsorbents....
Autori: Ioan Mămăligă, Constantin Baciu, Stelian Petrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25394

Abstract The current paper describes the concept and the mathematical models axed upon flow transport and transport of pollutants in the aquifer inside a metallurgical waste hall. Then, using a complex of basic data related to a representative case study - several information being achieved by systematic measurements, for long period, throughout ten drillings - and the pack of FEFLOW 5.1 programmes, the dispersion of an uppermost pollutant (the anion SO4) has been numerically simulated, for t...
Autori: Elena Doinita Carlig, Esmeralda Chiorescu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25416

Abstract The photocatalytic degradation of sulfamethazine, a sulfonamide drug, has been investigated experimentally, in aqueous heterogeneous solutions containing n-type oxide semiconductors as photocatalysts, and by simulation, using neural network modeling. Through direct neural network modeling, the evolution of the photocatalytic oxidation process is evaluated as function of illumination time and type of catalyst. Inverse neural network modeling is a particular optimization that gives inf...
Autori: Ciprian George Piuleac, Ioannis Poulios, Silvia Curteanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25430

Abstract This paper presents the corrosion processes of steel samples with different composition, in aggressive corrosion solutions containing chloride ions. The inhibition capacity of two new Mannich basis: 2-aceto-4-morpholylmetyl-1-naphtol (BM1) and 1- (2'-hydroxynaphtyl)-3-(4-morpholyl)-1-propanone (BM2) was tested and compared. The corrosion tests were done in a potentiostatic installation and, based on the polarization curves, the Tafel plots were obtained. The kinetic and thermodynamic...
Autori: Ileana Manciulea, Cristina Bogatu, Eugenia Comanita, Anca Duta, Lucia Dumitrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25459

Abstract This work investigated the sorption removal of chromate anion, in single batch systems, from aqueous solutions. The process involves the sorption of the chromate by a series of Mg/Zn-Al - type hydrotalcites, with four Mg/Zn/Al ratios, in two forms: uncalcined and calcined at 500 °C. The calcined Mg-Al (Mg/Zn/Al = 2/0/1) material showed the highest sorption capacity: 35.7 mg/g. The three-parametered Langmuir-Freundlich model approximated the experimental equilibrium data over the con...
Autori: Laura Cocheci, Rodica Pode, Eveline Popovici, Emiliana Dvininov, Aurel Iovi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25461

Abstract The use of fly ash (FA) in wastewater treatment received a lot of attention for the immobilization of heavy metal cations, mainly Cd2+, Pb2+, Ni2+, Zn2+, Cu2+. For an up-scalable wastewater treatment process, the substrate must have good adsorption efficiency and relatively constant behaviour. Modifying the fly ash surface can be a solution for reaching both goals. The use of FA for heavy metals removal, from wastewaters resulted in the dye finishing industry, faces a supplementary p...
Autori: Maria Visa, Anca Duta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25471

Abstract This paper presents an experimentally study of the anionic iodide separation from a mixture with immobilized liquid membrane. The experiments were carried out in a double jet installation. In order to intensify the transfer of iodide ions from the source phase to the receiving phase, the both phases are dispersed as droplets in the membrane and the hydrodynamic parameters of the dispersed phases are measured with the photographic method. The photos of the droplets were taken with a C...
Autori: Mihaela Emanuela Craciun, Mihaela Mihai, Gheorghe Nechifor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25476

Abstract Molecular imprinting is a versatile and ecological method for obtaining polymeric materials with a lot of applications in the field of pharmacy, medicine and biosensor assays. In this work, a new method of alternative molecular imprinting to design imprinted poly (vinyl alcohol) films has been proposed. Glycyrrhizinic acid has been used as template molecule. To demonstrate the obtaining of the molecular imprinted poly (vinyl alcohol) and its selectivity, studies of glycyrrhizinic and...
Autori: , Catalin Croitoru, Georgeta Moise
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25495

Abstract Phenols and chlorophenols are contaminants in soils, sediments, surface waters and groundwater, largely because of their worldwide utilization in the last 50 years as wood preservatives and general biocides in industry and agriculture. The toxicity of chlorophenols and their persistence in the environment require advanced treatment techniques for their removal. This study presents the results of a comparative evaluation of the adsorption of phenol and 4-chlorophenol from aqueous sol...
Autori: , Cezar Catrinescu, Roxana Elena Apreutesei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25497

Abstract Biofuels represent a possibility for renewable resources conversion, storage and distribution. Today, diesel oil is commercialized only blended with biodiesel, and according to the 30/2003 Directive of the EU, 5.75% of the total fuels used in the transportation sector must be represented by biofuels by the end of 2010. Biodiesel can be produced from vegetable oils, animal fats and used oils. Viscosity is one of the most important characteristics of liquid fuels. The viscosity of liqu...
Autori: Irina Nita, Dan Mandalopol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25499

Abstract This paperwork tried to simulate the combustion inside the naval engines using the newest computer methods and technologies with the result of a diverse and rich palette of solutions, extremely useful for the study and prediction of complex phenomena of the fuel combustion. The paperwork is contributing to the theoretical systematization of the area of interest bringing into attention a thoroughly inventory of the thermodynamic description of the phenomena which take place in the co...
Autori: Nicolae Buzbuchi, Liviu Constantin Stan, Daniela-Elena Mitu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25514

Abstract The use of appropriate leaching tests and leaching models can help to predict the hazardous components release from cementbased solidified waste during either utilization or disposal. Numerous parameters influence the leaching rates such as grain size/specimen size,ccc liquid-to-solid ratio, pH value of the leachate, leaching time etc. This study evaluates the effect of initial liquid-to-solid ratio of cement paste on the release of copper from cement-based solidified waste. Dynamic ...
Autori: Constantin Bobirica, Liliana Bobirica, , Ionel Constantinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25527

Abstract Life Cycle Cost Analysis (LCC) and Social Life Cycle Analysis (SLCA) are available methodologies for the economic and social assessment of a product or process along its life cycle. Different approaches regarding LCC and SLCA have recently emerged and several hypotheses are currently on testing and discussing. This paper shows existing LCC and a SLCA approaches as well as the methodology applied in the particular case of a paper recycling process. This study gathers part of the Europ...
Autori: Beatriz Ferreira Pozo, Antonio Dobon Lopez, Carlos Lopez Lopez, Maria Calero Pastor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25529

Abstract The presence of heavy metals in the environment is a major concern due to their non-biodegradability, bioaccumulation tendency, persistence in nature and toxicity to many life forms. Different treatment techniques for wastewater laden with copper have been developed in recent years to decrease the amount of wastewater produced and to improve the quality of the treated effluent. All techniques have their advantages and limitations in application. One of the most used techniques to rem...
Autori: Petru Bulai, Catalin Balan, Camelia Scripcariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25531

Abstract Sorption is one of the several methods that have been successfully utilized for dyes removal. A large number of materials have been used as suitable sorbents for decolourization of industrial effluents: activated carbon (the most common but expensive adsorbent), polymeric resins, various low-cost adsorbents (agricultural and industrial by-products, peat, chitin, silica, bentonite, other clays, fly ash). Our paper is a review about our researches regarding different types of industri...
Autori: Daniela Suteu, Carmen Zaharia, Augustin Muresan, Rodica Muresan, Alina Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25532

Abstract Tartrazine, (CI 19140) is an azo dye widely used in pharmaceuticals, cosmetics and foodstuff, as well as for coloring the textiles, hence it can be easily found in municipal wastewaters or wastewaters originating from textile, food, drugs and cosmetic industry. In this work, the capacity of a Romanian soil to retain Tartrazine from aqueous solution by sorption onto soil particles of different size has been investigated. The sorption kinetics was studied by applying five kinetic model...
Autori: Florentina Anca Căliman, Laura Carmen Apostol, Dumitru Bulgariu, Laura Bulgariu, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25534

Abstract Chlorophenols are contaminants in soils, sediments, surface waters and groundwater, largely because of their worldwide utilization in the last 50 years as wood preservatives and general biocides in industry and agriculture. The toxicity of chlorophenols and their persistence in the environment require advanced treatment techniques for their removal. Surfactant-modified natural zeolites (SMZs) represent an important class of sorbents for water treatment. This work presents a comparat...
Autori: Roxana Elena Apreutesei, Cezar Catrinescu, Adrian Ungureanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25537

Abstract The paper describes the complex research developed within a national research project. The proposed studies and researches are according to the thematic frame of the program cooperation-environment of FP7, whose fundamental objective is related to the natural and anthropogenic environmental problems and resources. Under this context, the project proposes a coherent, conceptual framework for integrated environmental risk assessment and management, generated by the presence of persiste...
Autori: Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25548

Abstract The efficient understanding and application of mathematical models in the study of environmental phenomena keep up with the latest results in the mathematical domain which could provide solutions for controlling, analyzing, predicting and study of risk phenomena. This paper presents a browsing through some mathematical categories of interpreting statistical data, examples and their analysis in connection with the degree of polluting the water down the Danube River with the help of qu...
Autori: Valerian Antohe, Constantin Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25562

Abstract The goal of the study was to investigate the sorption behavior of Acid Orange 7 (C.I. 15510) onto soil collected from Iasi area (Romania). The sorption isotherm, kinetic and thermodynamic studies were performed by batch mode. The effects of experimental parameters such as contact time, pH value (2-12) and temperature (20 - 400C) have been studied. Also the influence of initial dye concentration (10 - 100 mg/L) and sorbent dosage (from 5 g L-1 to 150 g L-1) were studied. It was found ...
Autori: Camelia Smaranda, Dumitru Bulgariu, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25566

Abstract In this study the adsorption of cobalt(II) from aqueous solutions on peat (from Poiana Stampei, Romania) activated by simple chemical treatments, was investigated from kinetic point of view. The chemical treatments suppose the mixing of peat with aqueous solutions of common chemical reagents (H2SO4, NaCl and NaOH), without the addition of supplementary additives. An increase of adsorption capacity of peat was obtained in case of treatments with NaCl and NaOH respectively, and this is...
Autori: Corneliu Caramalau, Laura Bulgariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25571

Abstract In this paper, the capacity of a soil to retain the dye Erythrosine B from aqueous solution by sorption has been studied. Batch adsorption experiments were conducted to investigate the sorption of the dye from aqueous solutions onto soil with particles of different size. Different models were used to describe the kinetic data, to calculate the corresponding rate constants and to predict the theoretical capacities of soil for dye sorption. ...
Autori: Florentina Anca Căliman, Laura Carmen Apostol, Dumitru Bulgariu, Laura Bulgariu, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25573

Abstract Heavy metals produced and released by anthropogenic activities generate serious environmental problems. Ions of toxic metals can bind to the mineral surface in a number of ways, including absorption, adsorption, precipitation, ion exchange. The paper shows that the fate and migration of heavy metals in soils strongly depend on the physical properties and chemical and mineralogical composition of such environments. Cadmium is one of the most toxic metals with carcinogenic and teratog...
Autori: Vasile Lucian Pavel, Dumitru Bulgariu, Laura Bulgariu, Raluca Maria Hlihor, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25577

Abstract The removal efficiency of Pb(II) from aqueous solutions by sorption on a bifunctional acrylic ion exchange resin with groups of hydroxamic acid and amidoxime is presented. It was found that Pb(II) sorption potential varies as function of solution pH, initial metal concentration, contact time and temperature. From aqueous solutions with Pb(II) initial concentration of 82.96 ?ŽÂ?g/mL the sorption percentage is 98.64%. The Langmuir and Freundlich isotherms were used to model the Pb(II) ...
Autori: Anca Ceica, Carmen Paduraru, Igor Creţescu, Lavinia Tofan, Violeta Neagu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25586

Abstract Chromium (Cr) is one of the most common metal contaminants in soil because of its use in ore refining, production of steel and alloys, metal plating, tanneries, wood preservation, and pigmentation. In soil environment, the most stable oxidation states of chromium are Cr (III) and Cr (VI). While Cr (III) is considered an essential trace element for the functioning of living organisms, Cr (VI) is toxic and carcinogenic to humans via inhalation for long exposures, since it is easily sol...
Autori: Dumitru Bulgariu, Laura Bulgariu, Maria Gavrilescu, Raluca Maria Hlihor, Vasile Lucian Pavel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25590

Abstract The aim of this study was to investigate the Congo Red (CR) sorption behavior onto six soils from Ia?…?¸i area, with different characteristics. The rate of sorption of Congo red dye molecules from aqueous solution by soil was studied in batch conditions. The rate of sorption was very rapid in the first 5-10 minutes and reached a maximum in 20 minutes. Kinetic modeling analysis of the pseudo-first-order, pseudo-second-order, intraparticle diffusion and Elovich equations reveals that t...
Autori: Camelia Smaranda, Dumitru Bulgariu, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25594

Abstract The aim of this study is the evaluation of photo-Fenton as a suitable advanced oxidation process to degrade ampicillin and streptomycin antibiotics. The degradation was studied by monitoring the organic substrate concentration changes in aqueous solution as a function of reaction time using COD analysis. The oxidation process follows two successive stages. In the first stage (I) the oxidation of the antibiotics takes place with high reaction rate, leading to intermediate oxidation pr...
Autori: Cristina Orbeci, Daniela Simina Stefan, Ion Untea, Madelene Dancila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25602

Abstract Characterization of soil permeability is of great importance for several geotechnical analyses. In common practice, because of the difficulty in sampling of granular material, constant head permeability tests are usually employed on specimens having similar relative densities to those in the field. An alternative approach to permeability tests for granular soils is the prediction of permeability levels by means of empirical equations depending on several particle size distribution an...
Autori: Alper Sezer, Burak A. Goktepe, Selim Altun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25609

Abstract Anaerobic digestion (AD) is a complex biological system which can be affected by several operational problems. Among them, biological foaming is one of the most difficult to deal with. It has many effects, such as causing gas pipe clogging and probe failures, and it can affect mixing devices, etc. Since the mechanisms involved in biological foaming development are not fully understood, it is not included in standard anaerobic digestion models. For this reason, a knowledge-based risk ...
Autori: Eric Latrille, Ignasi Rodriguez-Roda, Jean-Philippe Steyer, Joaquim Comas, Jordi Dalmau
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25610

Abstract Decision trees and rule-based systems including variants based on propositional and fuzzy logic have been the method of choice for knowledge representation in many applications of environmental decision support systems. Reasons are the ease of use, the capability of representing uncertainty, and the fast computation of results at runtime when using decision trees, rule-based systems, or other similar means for knowledge representation. Unfortunately there are drawbacks related with t...
Autori: Franz Wotawa, Ignasi Rodriguez-Roda, Joaquim Comas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25614

Abstract Artificial neural networks (ANNs) are capable of learning the relationships between the dependent and predictor surface water quality variables and have a high ability to predict from the new data set. In this study, two different ANN methods, the feedforward network (FFN) and the cascadeforward network (CFN) were applied to predict two surface water quality variables such as chlorophyll-a (Chl-a) and fecal coliform (FC) using twelve other variables as an input to the models. Both me...
Autori: Hasan Merdun, Ozer Cinar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25623

Abstract Equilibrium and kinetics of sorption of Zn (II) ions from aqueous solutions of pH 5 on indigene (Romanian) peat moss were investigated in batch system. The experimental equilibrium sorption data at three temperatures were analysed by Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich sorption isotherm models. Results indicate the following order in to fit the isotherm equations: Langmuir > Tempkin > Dubinin-Radushkevich > Freundlich. The equilibrium sorption capacity determine...
Autori: Angelica Kicsi, Doina Bilba, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25632

Abstract Mathematical models have become a valuable tool to study the anaerobic digestion process, to guide plant design and optimize operation strategies. Models require accurate and significant parameter values for being useful. Although the identification problem is an issue of concern, often is neglected. The described method for model calibration consists on the performance of simultaneous batch experiments (SBE), which requires simple and usually available equipment, and is based on the...
Autori: Belen Fernandez, Jordi Palatsi, Josep Illa, M. Angels Colomer, Xavier Flotats
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25636

? SUSTAINABLE CONCRETE HARDENING PROCESSES IN NORMAL CLIMATIC AND THERMAL TREATMENT CONDITIONS ? THE ENVIRONMENTAL DIMENSION ? AN INTERDISCIPLINARY RESEARCH AREA ? MENU PLANNING STRATEGY BASED ON ECOLOGICAL FOOTPRINT ? EVALUATING ENVIRONMENTAL IMPACT OF NIGERIAN COMPOSTED WASTES USING LABORATORY EXTRACTION TEST ? IN SITU RADIOFREQUENCY FIELD LEVEL ASSESSMENT IN TWO URBAN AREAS IN ROMANIA: OPEN QUESTIONS TO ELECTROMAGNETIC POLLUTION ? INNOVATIVE SOLUTION FOR WARNING ON HI...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25657

? RESEARCH ON NaCl SALINE AEROSOLS I. NATURAL AND ARTIFICIAL SOURCES AND THEIR IMPLICATIONS ? DECISION SUPPORT MODELS FOR SOLID WASTE MANAGEMENT ? AN OVERVIEW ? POLICY AND STRATEGY FOR IMPROVING SUSTAINABLE SOCIAL DEVELOPMENT PROGRAMMES ? APPLICATION OF SHALLOW POND SYSTEM USING WATER HYACINTH FOR DOMESTIC WASTEWATER TREATMENT IN THE PRESENCE OF HIGH TOTAL DISSOLVED SOLIDS (TDS) AND HEAVY METAL SALTS ? TRENDS OF THE COMMUNITARIAN COHESION POLICIES AND ADVERTISING FOR EC...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25658

? GREEN SYNTHESIS OF SYMMETRICAL CARBONATE FT-IR STUDY ? SINTERED BASALT AS A PROMISING SUSTAINABLE MATERIAL IN MECHANICAL ENGINEERING ? DESIGN OF BUILDINGS INCLUDING ENVIRONMENTAL IMPACT ? ANALYSIS METHODS FOR PYRAZINE-2,3-DICARBOXYLIC ACID SYNTHESIZED USING ELECTROCHEMICALLY REGENERATED KMnO4 ? RESEARCH ON NaCl SALINE AEROSOLS II. NEW ARTIFICIAL HALOCHAMBER CHARACTERISTICS ? DETERMINATION OF AEROSOLS POLLUTANTS ON MEMBRANES. 1. MEMBRANES PREPARATION AND CHARACTERIZATIO...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25660

? POST-DARCY FILTRATION THROUGH RIGID PERMEABLE MEDIA ? BIOSORPTION OF Cr(VI) FROM AQUEOUS SOLUTIONS ONTO Hydrilla verticillata WEED: EQUILIBRIUM, KINETICS AND THERMODYNAMIC STUDIES ? IMPACT OF BUILDING A TIDAL GATE ON THE YONGJIANG RIVER IN CHINA ? MONITORING OF THE HYDROTECHNICAL TORRENT CONTROL STRUCTURES: A STATISTICAL APPROACH ? RESEARCH ON SOIL PROPERTIES CONSERVATION DURING THE PREPARATION OF GERMINATION BEDS IN GREENHOUSES ? MANAGEMENT OF THE POTATO CROPS FOR MIN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25664

? ADSORPTION OF DYE FROM AQUEOUS SOLUTION USING SILVER WOOD SAWDUST CARBON ? TIME SERIES ANALYSIS OF THE HEAVY METALS LOADED WASTEWATERS RESULTED FROM CHROMIUM ELECTROPLATING PROCESS ? WATER QUALITY CHARACTERIZATION OF THE PRUT RIVER ? ETHICAL AND SUSTAINABLE EDUCATION OF ENVIRONMENTAL ENGINEERS - BETWEEN REALITY AND HOPE ? INTERACTIONS AMONG CLIMATE, VEGETATION AND SOILS IN RADUCANENI ? IASI AREA ? DISTRIBUTION OF MIXING INTENSITY OF OXYGEN-VECTOR DISPERSIONS IN AERATED...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25669

Acidithiobacillus ferrooxidans plays an important role in the pyrite oxidation process and has been widely studied in order to determine the kinetics of the reactions, but the details of the oxidation processes on the surface of pyrite keeps poorly known. In this study, the bio-oxidation process of pyrite by Acidithiobacillus ferrooxidans was studied by comparing with abiotic oxidation by Fe3+. The attachment of Acidithiobacillus ferrooxidans on pyrite surface was found by using Scanning Electro...
Autori: Lei Jiang, Huiqun Yang, Yuruo Tao, Jinyan Yanghttp://www.ecozone.ro/reviste.php?RID=25686

Abstract:Under the circumstances of the total energetic recourses deficit in the Republic of Moldova appears the problem of non-traditionalsources utilization. An important source of renewable energy is the wind energy. This paper deals with two new concepts ofvertical axis wind turbine (VAWT) with helical blades, elaborated by the authors.The main element of the wind turbine is, certainly, the rotor. It is directly subdued to the action of the air flow and transforms thekinetic energy of the ai...
Autori: Ion Bostan, Ion Vişa, Rodion Ciupercă, Valeriu Dulgheru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25722

Abstract:An efficient conversion of kinetic energy of river waters into mechanical or electrical energy without building barrages isprovided by micro-hydropower stations. Increased efficiency is achieved by an optimum position of the blades withhydrodynamic profile. The formulation used to compute the hydrodynamic forces is an inviscid - boundary layer model. Microhydropowerstation provides kinetic energy conversion of river water into mechanical or electrical energy without buildingbarrages. In...
Autori: Anatol Sochireanu, Ion Bostan, Ion Dicusară, Nicolae Trifan, Oleg Ciobanu, Radu Ciobanu, Valeriu Dulgheru, Viorel Bostan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25723

Abstract:This work concerns studies related to strategic development of products in which bio-based plastics are or will be applied, referredto as bio-based products. The studies cover (1) current and potential benefits of bio-based products in extended value chainsincluding activities after end-of-life of products, (2) value communication between stakeholders in extended value chains, and (3)creating an integrated development approach for optimized bio-based products. Most existing models for v...
Autori: J.W. Lin, Jarmila Kopecká, Kim Ragaert, Ludwig Cardon, Maarten De Groote, Rolf Koster
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25728

Abstract:Incineration plants are used since the beginning of the twentieth century to transform the mixed municipal waste into thermalenergy and to convert the hazardous components of waste into harmless compounds. To minimize the environmental pollutionand maximize the energy efficiency of the produced energy, the control of the complex processes that occur into the waste toenergy conversion is of major importance. In this work, the system identification approach is used to determine the dynami...
Autori: Adrian Danila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25739

Abstract:Methyl orange and methylen blue are two dyes resulted from the textile industry. They are not raising just esthetical problems, butthey are toxic and hence harmful to aquatic animals. The aim of this study is to test the capacity of three types of sawdust (oak,willow and white poplar) and mixed substrates, sawdust: fly ash (FA), to remove the methyl orange (MO) and methylen blue(MB) from wastewater. The influence of contact time, solution pH and initial concentration of dyes on the blea...
Autori: Anca Duta, Dora Lucaci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25752

Abstract:The aim of this paper is to propose a set of thermal models for the regenerator by taking into account the time dependent heattransfer processes, and to combine them with the thermodynamic lumped description of the solar Stirling engine, accordingly torecent description.By using analytical and numerical methods, the optimum power of the engine is sought when various constrains (or not) areconsidered, particularly fixed heat transfer rate available at the source.A sensitivity analysis of...
Autori: Alexandru Dobrovicescu, Andreea Marin, Catalina Dobre, Georgiana Tirca-Dragomirescu, Michel Feidt, Monica Costea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25767

Abstract:Ash is a waste that can be an efficient substrate in wastewater treatment for the immobilization of heavy metals and for dyesremoval. For an up-scalable wastewater treatment process, efficient substrates, with relatively constant behavior are needed andmodifying the adsorbent surface can be a feasible solution. Fly ash, resulted from coal burning, and wood ash are mixtures mainlycontaining metal oxides and carbon in various proportion, depending on the initial raw material.The paper pre...
Autori: Maria Visa, Mihaela Nacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25771

Abstract:This investigation focused on the adsorption of Pb (II) onto Lewatit FO 36 resin from aqueous solutions. The effects of initialmetal concentration, contact time, pH of solution were factors that affected the adsorption of Pb (II). Adsorption kinetic was betterexplained by the pseudo second order type 1 kinetic model that was confirmed by the values (R2>0.986). The Langmuir,Freundlich, Temkin and BET adsorption models were used for the equilibrium studies and Freundlich isotherm bette...
Autori: Alireza Asgari, Azra Setodeh, Mehdi Ahmadi, Mohamad Sedigh Mortazavi, Pari Teymouri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25791

Abstract:The adsorption performance of a novel support for metal ions sorption and their removal from aqueous solutions was examined.The support is a new solvent-impregnated resin (SIR) which can be considered as an alternative adsorbent material capable ofselective sorption. The adsorbent was prepared by impregnating di-(2-ethylhexyl)-phosphoric acid (D2EHPA) onto AmberliteXAD7 resin beads, by dry impregnation method. The interaction between XAD7 resin and D2EHPA was evaluated by FTIRspectrosco...
Autori: Adina Negrea, Adriana Popa, Cornelia Muntean, Corneliu Davidescu, Lavinia Lupa, Mihaela Ciopec, Petru Negrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25793

Abstract:Coconut coir pith, an agricultural solid waste was used for the sorption of Cd (II) from aqueous solution in batch mode. Parameters like contact time, adsorbent dosage and pH effect were studied. Langmuir and Freundlich isotherms were used to model the adsorption equilibrium data and the system followed both the isotherms. Cd (II) adsorption capacity of coir pith was found to be 18.72 mg/g. Kinetic parameters of adsorption such as the Langergren pseudo-first-order, pseudo second order r...
Autori: Nagendra Badabhagni, Puthiya Veetil Nidheesh, Rajan Gandhimathi, Srikrishnaperumal Thanga Ramesh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25800

Abstract:The paper presents the results of a study carried out using the Artificial Neural Network (ANN) for prediction the coagulation/flocculation process of suspended solids in water treatment plant (WTP). In this research 5 kinds of Poly Aluminum Chloride (PAC) as coagulant were used to examine the impact of coagulant kinds, PAC dosage and influent turbidity for removal of suspended solids. Determination of optimal coagulant doses is vital, as insufficient dosing will result in undesirable t...
Autori: Gagik Badalians Gholikandi, Mohammad Delnavaz, Reza Riahi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25806

Abstract:In this study, the adsorption mechanism of a reactive azo dye, Reactive Yellow 125 (RY 125), onto a nitrogen doped TiO2 modified zeolite (Z-TiO2-N) has been examined in order to identify the affinity of the material for the investigated pollutant envisaging its degradation by heterogeneous photocatalysis. Equilibrium experiments were performed and the data obtained were fitted with different isotherm equations, i.e., Langmuir, Freundlich, and Dubinin-Radushkevich (D-R). The Freundlich i...
Autori: Cornelia Ratiu, Elida Cristina Ilinoiu, Florica Manea, Laura Cocheci, Liliana Andreea Colar, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25809

The relationships between economic growth, environmental sustainability and energy are of great interest among researchers and policy makers. One of the theoretical conclusions that have received most attention is the convergence of the per capita carbon emission levels. But empirical results of theoretical growth models that include the environmental variable or estimated Environmental Kuznets Curve are not conclusive. This paper uses a multivariate state-space model to examine the process of c...
Autori: Gema Fernández-Avilés, Jose Mondejar-Jimenez, Josep Illa, Manuel Vargas-Vargas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25823

Environment and sustainability are key issues for the policy maker. A policy should be first designed and realistically inserted in its proper context (regional, national, European) in order to be correctly assessed. After that, suitable models need to be chosen consistently with the policy context and with the evaluation purpose, to make easier the policy maker task. The aim of this paper is twofold. Firstly, to propose a Statistical Information System (SIS) approach in order to correctly write...
Autori: Giorgio Garau, Giovanni Mandras, Lucia Schirru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25827

An iron(Fe+3) oxide/hydroxide nanoparticles-based agglomerates (AggFe) suspension adsorbent was synthesized for efficient, cost-effective phosphate removal. A strong effect of AggFe concentration and pH level of water containing phosphate on removal efficiency was shown. It was found that phosphate adsorption onto the AggFe suspension may be described by pseudo-secondorder reaction kinetics and the Langmuir isotherm model. The unique adsorption properties of synthesized AggFe adsorbent are demon...
Autori: Grigori Zelmanov, Raphael Semiat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25829

Soil hydraulic characteristics are variable, being influenced by climate changes. Research conducted until now in this area has been based on field soil sampling; their laboratory analysis using experimental techniques; and the use of models and programs for data processing and interpretation. The present research is based on the idea of incorporating smart sensors on site, each one having its own network address, accessible for any location. They can be programmed to send an alarm signal when t...
Autori: Constantin Victor Stătescu, Dorin Cotiusca Zauca, Florian Stătescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25831

Increased intensity of precipitation events in a future climate provide result in a number of regions with improved, more detailed models. Many mathematical models include this part of hydrological cycle with implications regarding the climatic changes. The case study shows aspects regarding the climatic changes and its impact on designing the hydraulic structures and the hydrotechnical constructions behaviour in the case of extreme hydro-meteorological phenomena....
Autori: Catrinel-Raluca Giurma-Handley, Ioan Crăciun, Ion Giurma, , Valentin Boboc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25836

The aim of this work is the study of activated sludge floc samples stained with different dyes and imaged by Confocal Laser Scanning Microscopy (CLSM). Activated sludge flocs were stained for lipids, sugars and esterase enzyme producing bacteria. Images were acquired for different samples to analyze the structural characteristics of the bioaggregates. The analysis of the CLSM images allowed for the localization and estimation of the quantity of different build-up materials. The 3-D reconstructio...
Autori: Bela Abraham, Botond Raduly, Dan Niculae Robescu, Szabolcs Lanyi, Szabolcs Szilveszter, Szilard Bucs
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25937

This paper presents a mathematical model for the prediction of pollutant transport in rivers. The model has been developed and calibrated using the Matlab software and relying on field data from Romanian Someş River (collected in case of accidental cyanide release). Field data has been used to estimate model parameters (e.g. dispersion coefficient, velocity) as variable in time and space in order account for river features non-uniformity in time and also in space. These initial parameter va...
Autori: Elisabeta-Cristina Ani, Vasile Mircea Cristea, Paul Serban Agachi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25848

The removal of Cr (VI) from aqueous solutions by sphagnum peat moss was investigated in batch experiments as a function of solution pH and initial Cr (VI) concentration. The highest removal percentage (R=99%) was obtained at pH = 1, in solutions of 20.8 mg Cr (VI)/L. In order to establish the mechanism of the removal process, Cr (VI) and total Cr (Cr (VI) + Cr (III)) in residual solutions was analyzed. The Cr (VI) removal by the peat moss at low pH is governed by two processes – electrostatic ...
Autori: Catalin Balan, Doina Bilba, Irina Volf, Matei Macoveanu, Petru Bulai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25849

Equilibrium and kinetics of nitrate removal from aqueous solutions of pH = 6.8 were investigated using the strong base anion exchange resin (Purolite A-520E) in the batch method. The experimental equilibrium data were analyzed by means of the Langmuir, Freundlich and Dubinin-Radushkevich sorption isotherm models. The Langmuir model describes sorption isotherm of nitrates with high correlation coefficients and better than Dubinin-Radushkevich and Freundlich models. The effect of temperature on th...
Autori: Anca Ceica, Igor Creţescu, Ion Balasanian, Laura Bulgariu, Liliana Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25851

This manuscript pointed out an error on pseudo-second-order rate equation. The mistake in the model was duplicated in number of papers in recent years. This type of error could be avoided if authors have had paid more attentions to details about the model from the original paper. In addition, it may leads to trouble for the reader to locate the original articles. It is very provoking and time-consuming to search for a reference when the information is not correct. This comment offered informatio...
Autori: Yuh-Shan Ho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25876

The Landra Wastewater Treatment Expert System is developed by the University of Pannonia (Hungary, Veszpr?Šm). The flexible, simulation-based software provides the possibility to choose the built-in mathematical models or the user may create a new one arbitrarily. A customized program codes can be created according to the technological description, the input data and the control strategy provided by the user. This way the efficiency and reliability of the system is significantly enhanced. An imp...
Autori: , Endre Domokos, Tatiana Yuzhakova, Viola Somogyi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25888

Quantification of the floristic matrix is important both for animal’s nutrition and for the biodiversity monitoring of plants species under the influences of substance flow. Our researches have the main aim to study the possibilities offered by Infrared Spectroscopy in rapid, unpolluted and non-destructive analysis of floristic matrix modification from perennial grassland fertilized with organic and/or mineral fertilizers. It was performed three different FTIR models: for Poaceae (R2=0.949; RM...
Autori: Iosif Gergen, Moisuc Alexandru, Monica Harmanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25892

Four processes have been used to enhance the ozonation of phenol in water: I-pH increasing (O3-pH), II- hydrogen peroxide addition (O3- H2O2), III- UV irradiation (O3- UV), and in the presence of both H2O2 and UV; IV-(O3- UV- H2O2). In each of these processes the rate of phenol degradation has two components: direct and indirect....
Autori: Eszter Arany, Ildiko Bartalis, Ilie Siminiceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25904

AbstractThe adsorption of hexachlorocyclohexane (HCH) by modified meerschaum was studied. The comparison of the meerschaummodified by anion and cation surfactant was conducted to explore their effect on HCH adsorption. The results showed that theabsorbability of HCH by the CTMAB-M (cetyltrimethylammonium bromide-modified) is better than that of SAS-M (sodiumdodecyl sulphonate-modified) because the CTMAB-M has fluffier fibers structure. The addition of amount of adsorbents shouldimprove the adsor...
Autori: Chanjuan Gao, Shengke Yang, Wenke Wang, Yaqian Zhao, Yue Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25948

AbstractThis paper focused on estimating climate change impact on the future water availability in the Yellow River Basin,China. However, climate change and its impact on water availability are subject to large uncertainties. In order todeal with uncertainties, scenarios were used to explore possible future states of climate variables under uncertainty,and probabilities were attached to represent uncertainty explicitly according to the Principle of Maximum Entropy.Probabilistic scenarios of futu...
Autori: Congli Dong, Gerrit Schoups, Nick van de Giesen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25957

AbstractA comprehensive evaluation methodology for water environmental carrying capacity (WECC) has been proposed. It is based ona new definition of WECC and reasonable evaluation models compared with vector norm method for water resources supply,environmental assimilative capacity, and society supporting capacity. Evaluation index of WECC is determined for Xi’an city,depending on characteristics of the water environment in Xi’an and selection principles of WECC evaluation index. Three-layerstru...
Autori: Jun Zhang, Qi Zhou, Ya-qian Zhao, Yani Geng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25960

AbstractDue to rapid growth in both population and economic development in China, water demand is increasing dramatically andChina is facing more and more severe water scarcity problems. Thus competitions for water (between uses, users and regions) areincreasing which make water use efficiency an important issue in China, together with the uneven spatial and temporaldistribution of water, all of which drive the Chinese government and water planners to find the optimal water resource allocationpl...
Autori: Adrian T. McDonald, Linda See, Martin Clarke, Yanan Jiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25961

AbstractThe transport of gases and solvents in polymeric membranes is an important phenomenon with many technical applications, suchas the mixture separation using polymeric membranes, the polymeric membrane preparation, the polymer devolatilization and theselection of appropriate polymeric membranes for a certain process. In most membrane separation operations and manufacturing,equilibrium and diffusion data are required.Useful information on equilibrium and diffusion can be obtained from the s...
Autori: Ciprian Constantin Negoescu, Eugenia Teodora Iacob Tudose, Ioan Mămăligă, Nicoleta Bunduc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25975

AbstractMethane landfill emissions are a general concern and should be estimated for taking the proper measures for global warmingmitigation. The European legislation is supporting all techniques that avoid, reduce or treat CH4 emissions. One of the maindirections is reducing the quantities of biodegradable waste disposed in landfills. The efforts for GHG emissions reduction andalso compliance with European legislation in the field of waste management does not mean only putting in place some sta...
Autori: Liliana Bobirica, Rodica Stanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25984

AbstractThis study presents the development and use of a hydraulic-coupled water quality model for the simulation of BiochemicalOxygen Demand (BOD) concentrations in the Bahlui River, a small river located in northeastern Romania. This river experiencesthe typical pollution problems for many Romanian water bodies: heavy pollution from both diffuse and point sources, lowconnectivity to wastewater systems in rural areas and moderate removal of pollutants in municipal wastewater treatment plants.Th...
Autori: , Claudia Cojocariu, Denie C.M. Augustijn, George Bârjoveanu, Ioan Crăciun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25985

AbstractThe paper presents and discusses some aspects concerning the development of an expert system designed for surface watermonitoring in the context of sustainable management of water resources in Romania and neighboring countries. Technicalconsiderations, which are worthy to be included in the analysis of such kind of systems, are addressed: the system structure(number, type and location of hydrometric stations), number and type of measured indicators, transducers and sensors used formeasur...
Autori: Anatolie Iavorschi, B. S. Nanda Kumar, Victor Sontea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25988

AbstractThis paper analyses mathematical models and numerical simulation results for a notional miniature, planar, spiral transformer(MPST) fabricated in MEMS technology, for galvanic separation, proposed to equip an electric harvesting device (EHD). Twotypes of core – ferrite and (partially) magnetic nanofluid – are considered. We found that magnetization body forces occur in thesuper-paramagnetic nanofluid core and they result in complex, steady state flows consisting of fully 3D recirculation...
Autori: Alexandru Mihail Morega, Jean Bogdan Dumitru, Lucian Pîslaru-Dănescu, Mihaela Morega
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25998

AbstractThe representation of relevant information from data generated through atmospheric imaging is of substantial importance toenvironmental sciences, meteorology, as well as in weather hazard predictive models for disaster prevention. As the techniquesfor the acquisition of such data have progressed and grown in complexity, so have the visualization algorithms required to processthe related data and to produce images or animations of the underlying information. To this extent, we present a g...
Autori: Marius Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26001

AbstractThis paper describes a model and an algorithm used to develop a solar radiation database for Romanian territory. In order toobtain this database, two main steps were performed. In the first part, a clear sky solar radiation model was presented, inaccordance with the latest models published in European Solar Radiation Atlas. After this, a digital elevation model has beendeveloped, based on the Shuttle Radar Topography Mission database, which, together with the previously mentioned model,a...
Autori: Ciprian Nemes, Marcel Istrate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26010

AbstractIn this paper the synthesis, characterization and testing of composite material based on multi-wall carbon nanotubes and silverdopednatural zeolite (MWCNT-ZAg) has been investigated for humic acid (HA) adsorption. The surface characterization of thecomposite material has been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM/ EDX) analysis.The Langmuir and Dubinin-Radushkevich (D-R) models fitted the best experimental data informing that adsorption process ofH...
Autori: Aniela Pop, Corina Orha, Florica Manea, Virgil Tiponut
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26023

AbstractIn spite of the fact that concern on water quality protection raised in the last decades heavy metals pollution still represents agreat threat for both human health and environment quality. Ion exchange proved to be an effective technique for industrialwastewaters treatment, as long as it ensures an effective recovery of valuable compounds. The main purpose of this work is toassess the performances of a commercial ion resin sort (a strong basic anionic resin – VIONIT AT 21), to remove ch...
Autori: Alexandra Raluca Miron, Cristina Costache, Cristina Modrogan, Dumitru Giani Apostol, Oanamari Daniela Butucea, Redha Kouachi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26025

AbstractThe paper describes the synthesis of nanocrystalline zinc ferrite starting from 1,4-butanediol and a mixture of zinc and ironnitrates. During the heating of the obtained solution, a redox reaction takes place with emission of brown nitrogen oxides andformation of a solid powder. This powder was characterized by thermal analysis and FT-IR spectrometry, techniques thatconfirmed the formation of a mixture of zinc and iron carboxylates. This mixture was further used as precursor for zinc fer...
Autori: Cornelia Muntean, Marcela Stoia, Paul Barvinschi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26029

AbstractThe hydrodynamics of two equipments from a surface water treatment pilot plant has been investigated through residence timedistribution (RTD) experiments using brine solution as tracer. Computational Fluid Dynamics (CFD) procedure, which isincreasingly utilized to study a wide variety of complex environmental fluid mechanics processes, was used to predict the flowpatterns and other properties of flowing fluids (e.g. velocity, concentration of species etc.). In this work, ANSYS Fluent 14....
Autori: Adina Pacala, Alain Liné, Alexandru-Dan Filep, Cosmina-Mariana Militaru, Teodor Todinca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26030

AbstractThe performance of two cation exchanger resins, Amberjet UP1400 and Amberlite IR120 in the process of Cs(I) ions removalfrom aqueous solutions was examined. Batch experiments were carried out to determine the influence of several parameters(resin dosage, contact time, temperature and initial concentration of Cs(I) ions) on the removal process. The equilibrium wasreached after 60 min for Amberlite IR120 and after 120 min for Amberjet UP1400, with an overall adsorption performance of~97% f...
Autori: Adina Negrea, Cornelia Muntean, Corneliu Mircea Davidescu, , Mihaela Ciopec, Petru Negrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26032

AbstractThis paper presents research into conceptualisation, design and implementation of an innovative web-based virtual environmentfor flood information sharing and dissemination. A system intended to be used by flood management authorities and potentiallyaffectedcitizens is demonstrated. Latest technological advances for collection, archiving and sharing of environmental data usingweb-based Spatial Data Infrastructure (SDI) are used for system implementation. Flood-related data and models are...
Autori: Adrian Almoradie, Andreja Jonoski, Dimitri Solomatine, Florin Stoica, Ioana Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26045

AbstractSimulations using computer models require detailed knowledge of all processes in the soil. Mohid Land is an important modelingprogram developed by a research team from Lisbon. It is a continuous, distributed, variable time step watershed that is grouping 4compartments and water moves through them. In this paper, the authors discuss the procedure applied for modeling using Mohidprogram and the results obtained during simulation of the behaviour of a type of soil....
Autori: Adriana N. Unguraşu, Cristina E. Iurciuc, Daniela F. Anei,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26049

AbstractQuality of water bodies is influenced by their ability to self-clean and disperse the existing substances in water originating fromnatural or anthropogenic sources. Creating mathematical models, using design software and simulation, in terms of surface waterquality monitoring, are standard design and interpretation of studies necessary for rational management of water resources. Andwe must respect the concept of "sustainable development”. In this paper we highlight this by modeling data ...
Autori: Florentin Nacu, Ion Giurma, Valentin Boboc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26056

AbstractThe paper presents the application of cross-spectrum analysis (CSA) to air pollution and meteorological time series collected fromseven air quality monitoring stations located in three urban agglomerations of Romania, affected by industrial and trafficpollution: Braşov, Ploieşti and Târgovişte. Data have been collected from November 2011 till March 2012, at one hour samplingrate. The purpose of the analysis was to reveal the correlations between two series at different fre...
Autori: Ştefania Iordache, Daniel Dunea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26057

AbstractThe paper analyzes the hydraulic calculation of channels with composed cross section having horizontal benches. Influences ofthe computation models on results of flows key are shown. There single cross section flow and parallel flows, by dividing thecross section, are considered.The nearest key of flows to the actually one corresponds to results of the model of dividing the composed cross section intosimply by horizontal, defined the banquet elevation....
Autori: Josif Bartha, Stefan Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26058

AbstractThe objective of this paper is to investigate the effect of expansive soil treatment with Eco-Cement (EC) stabilizer, as beingcomposed of an alternative binder that partly substitutes the Ordinary Portland Cement (OPC). The extended use of EC in soilstabilization will carry several significant environmental benefits. Firstly the by-product resulted from the production of iron in ablast furnace will be reused, that otherwise will be stored on the ground in deposits representing an importa...
Autori: Anghel Stanciu, Irina Lungu, Mircea Aniculăesi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26069

AbstractThe removal of residual oil from palm oil mill effluent (POME) using boiler fly ash was studied in this paper, with focus on theadsorption isotherms and kinetic studies by measuring the residual oil concentration using UV-spectrophotometer. The percentresidual oil adsorbed decreased from 80% to 5% as contact time was increased from 10 mins to 120 mins but increased from2.74% to 72.98% as initial concentration of residual oil increased from 0.04812 mg/L to 0.2406 mg/L. Pseudo-second order...
Autori: Jude C. Igwe, Stella N. Anioke, Uche Arukwe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26078

AbstractThe Romanian Soil Survey System does not imply, up to the present date, the use of digital methods in representing fieldcampaign results or for mapping soil parameters. The presented study tests several geostatistical methods to model some soilparameters (soil pH and topsoil humus content), mainly in order to observe the differences induced by the scale of the approachand to test existing data. In this respect, three differently dimensioned analysis scales were chosen, all parts of the s...
Autori: Ionuţ Vasiliniuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26083

AbstractThe performance of four low cost Iraqi clays, bentonite (BT), kaolinite (KT), attapalgite (AT) and flint (FT) to remove lead ionsfrom aqueous solutions by adsorption was investigated. Batch experiments were carried out at pre determined equilibration time,adsorbent dosage, solution pH, particle sizes, ionic strength, initial lead ions concentration and temperature. Adsorption of Pb2+ions was strongly affected by pH and best adsorption is achieved at pH 4.5. The systems were investigated ...
Autori: Najwa I. Abdulla
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26086

AbstractIn road traffic noise issues, experimental measurements are a relevant element in order to understand the problem and to adjustmodels. Sometimes, when measurements are not possible or in the designing phase, prediction models are used to perform anestimation of the equivalent level produced by a road infrastructure. Usually models parameters are obtained by a statistical datafit and thus they are related to the area where measurements have been performed. These models are suitable for st...
Autori: Gerardo Iannone
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26087

Abstract In many industrial applications most of the solid particles are separated by size and for this purpose there are used the oscillating sieves. The separation process based on sieves is a complex one and it depends on several factors, such as the properties of solid particles submitted to the separation process and on the operating regimes of the separating equipment. We have studied the separation process of the behaviour of solid particles on a flat oscillating surface...
Autori: Ovidiu Bontas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26134

Abstract This research analyses time series of air temperature and wind speed. Trends and periodical components are defined for both time series with no significant statistical relationship between them. The spectral analysis of temperature series with no trends shows the peak frequency fc = 1/12, corresponding to a seasonal periodical component. The graph of the spectral density function of the wind speed time series does not manifest a seasonal periodic component. Forecasting of ...
Autori: Rasid Burtiev
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26135

Abstract This paper develops a procedure whereby breakthrough curves obtained experimentally for ion exchange process in fixed bed ion mixed exchangers during water demineralization, can be used to characterize quantitatively and optimize the ion exchange process. In this regard, based on breakthrough curves there were developed statistical models that correlate three important factors which influence the process (superficial fluid velocity through the layer, changing layer height,...
Autori: Iuliana Rogoveanu Radosavlevici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26147

Abstract Biogas can be used as a renewable and green energy source by upgrading to natural gas. Water scrubbing, which is one of the most widely-applied upgrading technologies, involves an accurate knowledge of the solubility of the main biogas components in water, which is essential to the design and optimization of the biogas upgrading process. In this work, we use several thermodynamic models available in the Aspen Plus software modeling environment to calculate the solubilit...
Autori: Petronela Cozma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26148

Abstract The biosorption of Pb(II) and Cd(II) ions from aqueous solution on marine green algae biomass (Ulva lactuca sp.) was studied in batch systems, at initial solution pH of 5.0 and biomass dose of 8.0 g/L, considered as optimum experimental conditions. The obtained results from experiments of a single-component biosorption were analyzed using Langmuir, Freundlich and Dubinin- Radushkevich isotherm models. The Langmuir equation describe the biosorption isotherm of Pb(II) and Cd...
Autori: Laura Bulgariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26152

AbstractBehaviors of adsorption of di-n-butyl phthalate (DBP) on humic acid and the effects of temperature on these processes are studied by solid phase extraction-HPLC method. The results show that the adsorption amounts of DBP increase with increasingequilibrium-concentrations of DBP. Such results could be well described by Langmuir equation. The maximum adsorptionamount (Qmax) and adsorption constant (k) at 35oC were both lower than those at 25oC. Thus, high temperature is unfavorable to the ...
Autori: Zhi-dang Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26162

AbstractThis study estimates the number of visitors to State Protected Wilderness Areas (SPWAs) in Chile by origin (national andforeign), using annual data from 1986 to 2011. Two linear regression models were used: one to estimate the number of Chileanvisitors and the other for foreign visitors. The model to predict Chilean visitors in 2013-2014 incorporates the GDP per capita inChile, the annual trend in the conditions of international economic crises, while the model to predict the number of f...
Autori: Jaime Pérez-Kallens
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26189

AbstractGallinaceous feathers are an abundant solid waste from the poultry processing industries, which poses disposal problems. Akinetic study dealing with the adsorption process of wool reactive dye, Yellow Lanasol 4G (CI Reactive Yellow 39), ongallinaceous (Gallus gallus, Cobb 500) feathers was carried out. The main research goals of this work were to evaluate theviability of using this waste as adsorbent and to study the kinetics of the adsorption process, using a synthetic effluent. Thechar...
Autori: Sónia Adriana Figueiredo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26203

AbstractThis study presents a simple, synoptic and suitable for continuous monitoring model based on the fuzzy logic to monitor landdegradation after a forest fire in a Spanish Mediterranean coastal area. The model combined topography and vegetationinformation to assess land degradation status. Topography parameters, slope and aspect were derived from a digital elevationmodel (DEM). Evidences about the soil status were obtained by analyzing the vegetation cover with remote sensing images. TheNor...
Autori: Ignacio Melendez-Pastor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26206

AbstractPotential of unmodified Wheat Straw as an adsorbent for the removal of lead and copper was studied. Effect of pH, adsorbentdose, contact time and initial metal concentration on the removal of the metal ions were also investigated. Maximum removal oflead was found to be 43.55% by wheat straw under optimum conditions (pH=5, adsorbent dose=16g/L, contact time= 240minutes, metal concentration=100 mg/L). Unmodified Wheat straw removed 0.381 mg/g of lead. While 56.36% copper removalwas achieve...
Autori: Mehwish Anis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26209

AbstractThis work presents the removal of heavy metal ions (Cu2+ and Cr3+) from aqueous solutions with the use of pine (Pinus silvestris) sawdust. The experiments were conducted in a batch mode. Kinetic and equilibrium parameters of biosorption – which are best described by pseudo-second order and Langmuir models – were determined. The maximum sorption capacity at pH 5 and a temperature of 20°C for pine sawdust amounted to 21.47 mg/g for Cu2+ ions and 39.63 mg/g for Cr3+ ions, respectively.Therm...
Autori: Anna Witek-Krowiak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26210

AbstractThe removal of Acid Black 1 dye was investigated by acid treated pumice stone as a low cost adsorbent, since acidicmodifications were expected to improve the sorption capacity. The main components of the considered adsorbent were SiO2 andAl2O3 and acid treated pumice shows irregular structure. The effect of various parameters such as the initial dye concentration,the contact time, the temperature and the pH were studied. An increase of the contact time, the initial dye concentration or a...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26211

AbstractAdsorption of a cationic dye, methylene blue, from aqueous solutions by using sawdust (without any modification) by batchadsorbers was investigated. The surface characterization of the saw dust was carried out by Fourier transform infrared (FTIR) andscanning electron microscopy (SEM) and pHzpc of the surface was also determined. Effects of different parameters such ascontact time and initial concentration, temperature and pH on the process of removal were studied. The process of removal ...
Autori: Sushmita Banerjee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26216

AbstractLow water quality due to high levels of ammonia, chemical oxygen demand (COD), abnormal pH, and undesirable water color isprevalent in many prawn ponds in Malaysia. A composite medium used in the treatment of prawn pond effluent was examinedfor the reduction of undesirable parameters. The composite medium is a mixture of limestone, activated carbon, zeolite, and ricehusk. Experiments were conducted under three different conditions, i.e., sole aeration, adsorption, and adsorption with pre...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26219

AbstractKohonen Self-organizing map (KSOM) modeling have been applied increasingly for analysis, estimation and prediction ofseveral water quality processes, which are embedded with high complexity, dynamism and non-linearity. KSOM or unsupervisedneural networks were applied to microbial data (Escherichia coli, faecal streptococci, and total coliforms) from the effluent of atwo year data set (2008-2010) on two permeable (pervious) pavement systems used to treat storm water runoff contaminated wi...
Autori: Kiran Tota-Maharaj
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26226

AbstractIn this work, a four factor three-level Box–Behnken factorial design based on response surface methodology (RSM) wasemployed to optimize the removal of phosphate from synthetic wastewater (mineral salts medium-MSM) by the bacterialconsortium (Bacillus sp. RS-1, Pseudomonas sp. YLW-7, Enterobacter sp. KLW-2). A mathematical model was then developedto show the effect of each medium composition and their interactions on phosphate removal. The effect of the lactoseconcentration (X1), pH (X2)...
Autori: Krishnaswamy Usharani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26235

AbstractNutrient runoff is an environmental concern. There is a need for a robust method of predicting nutrient concentrations in runofffrom feedlots to facilitate management practices. To investigate the feasibility of using multiple linear regression (MLR) andartificial neural network (ANN) in predicting nutrients in runoff, simple water quality paramters (e.g., pH and EC) of runoff froma feedlot in North Dakota, USA, were used to train an ANN. Both models accurately predicted potassium concen...
Autori: Bilal Cemek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26236

AbstractThe purpose of the undertaken research work is to degrade the biopolymeric pigments present in the distillery spentwash. This isdone by direct electro-oxidation using iridium oxide coated titanium mesh as catalytic anode. The effects of current intensity,dilution, pH and time of electro-oxidation were studied. The combined effects were analyzed using Box-Behnken design foroptimization and statistical analysis. The rate constant for first order electrochemical kinetics relating the rate c...
Autori: R. Krishna Prasad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26253

AbstractA novel RHA/PFA/CFA sorbent was developed by sol-gel method using three types of ashes, i.e. rice husk ash (RHA), palm oilfuel ash (PFA) and coal fly ash. From surface analysis of selected RHA/PFA/CFA sorbents, the spent sorbent had more compactstructures covered by irregular rough surface and the specific structure of raw RHA, PFA, and CFA were no longer visible. Inaddition, lower specific surface area was obtained for spent RHA/PFA/CFA sorbent. Batch studies were performed to evaluatet...
Autori: Irvan Dahlan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26272

AbstractThe extent of the problem of the excessive fluoride in drinking water remains an important health issue. In the present work,strong-base anion resins were investigated to assess their sorptive removal capacity of fluoride from water. It was found that theremoval of fluoride was high at natural pH (7) and was improved for increasing contact time and adsorbent dosage. Themaximum sorption of the resin was 13.7 mg/g according to the Langmuir model, namely higher than the values reported in t...
Autori: Mohammad Taghi Samadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26273

AbstractIn this work, fruit shell of Cocos nucifera (FSCN) treated with H3PO4 has been tested as a low cost adsorbent for the removal of methylene blue (MB) from aqueous solution in batch and column process. The adsorption of MB onto FSCN was affected by the initial solution pH, dye concentration, temperature, column internal diameter and adsorbent dose. The adsorption equilibrium data was fitted well to the Langmuir model and the maximum adsorption capacity was found to be 20.74 mg/g at 40şC. K...
Autori: Pijush Kanti Mondal, Rais Ahmad, Rajeev Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26274

AbstractThe present work is focused on the importance of the resolution and accuracy of the wind fields in modeling waves in the Black Sea. Two different wind fields are considered for forcing the third generation spectral wave model SWAN. The wind data wave model results are compared against ‘in situ’ measurements performed at the Gloria drilling unit and also against satellite data for a two-month period of wintertime at the beginning of 2002. Subsequently, the model simulations were extended ...
Autori: Dorin Butunoiu, Liliana Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26283

AbstractIn the present paper, support vector machines (SVMs) are used to develop a quantitative structure-activity relationships (QSAR) model for the reaction rate constants (-logkNO3) of 115 heterogeneous organic compounds, through reaction with nitrate radicals (NO3•) in the troposphere. Two quantum chemical descriptors used as the inputs for the SVM model were calculated with density functional theory (DFT), at the B3LYP level of theory with 6-31G(d) basis set. The best predictions were obtai...
Autori: Bing Yi, Jiyong Deng, Xinliang Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26284

AbstractThe objectives of this study were to investigate of cadmium and chromium adsorption from aqueous solutions by using orange (Citrus sinensis var Tampson) and sour orange (Citrus aurantium) mesocarp. The chemometric approach was applied for the optimization of removal percent of Cd2+ and Cr6+. To optimize Cd2+ and Cr6+ removal percent, the effect of four experimental parameters on removal percent was investigated by means of multivariate analysis. The considered factors were Cd2+ and Cr6+ ...
Autori: Maryam Bagheri Ardebilian, Mohammad Ali Zazouli, Pouneh Ebrahimi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26287

AbstractHexavalent chromium can contaminate drinking water resources and should therefore be removed from industrial waste effluents. The use of ion exchange resin was examined in batch tests to remove Cr (VI) from acidic solution by Amberlite IRA 410. Equilibrium data were analyzed and modelled using Freundlich and Langmuir adsorption isotherms and the results showed that the adsorption behaviour of Cr (VI) could be accurately described by means of a Langmuir model. The monolayer adsorption cap...
Autori: Abdeltif Amrane, Aicha Bensmaili, Malika Chabani, Yasmine Ait Ouaissa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26289

AbstractThis paper presents the results of the removal of arsenite and arsenate ions from an aqueous solution using Fenton modified solid waste vegetable oil industry (SWVOI). Several factors (such as pH, contact time and Fe2+/H2O2 ratio, initial arsenic ion concentration and adsorbent concentration) that affect the arsenic ion adsorption on the SWVOI adsorbent material were investigated. The sorption characteristics of the adsorbent material before modification were also studied and compared wi...
Autori: Hoda Amiri, Mehdi Ahmadi, Nemat Jaafarzadeh, Susana Silva Martínez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26290

AbstractThis study focus on the possibility of removing the basic textile dye Astrazon Blue FGGL 300% 03, from an aqueous solution, using Esmegel clay as adsorbent. The characterization of the adsorbent included the distribution of particle size, physical textural properties, chemical composition and determination of the point of zero charge. The equilibrium isotherms were determined at 20 and 30 °C, pH at 6.0 and 7.5 and adjusted to the Langmuir and Freundlich models, having the latter led to b...
Autori: Chia-Yau Cheng, Paula M.S.S. Luís, Rui A. R. Boaventura
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26292

AbstractAerobic granulation is a novel biotechnique for the treatment of coloured wastewater containing toxic xenobiotics in sequencingbatch reactor (SBR). The aerobic granules were investigated as a potential biomaterial for biodegradation of p-nitrophenol. Theremoval efficiency of p-nitrophenol was 93 % after 65 days of operation at 8 hr hydraulic retention time (HRT). The aerobicgranules were cultivated at a p-nitrophenol loading rate of 0.9 kg m-3 day-1, with sodium acetate as co-substrate t...
Autori: Pijush Kanti Mondal, Rais Ahmad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26302

AbstractThis investigation compared the performance of Fenton and photo-Fenton oxidation processes in the treatment of sulfidic spentcaustic wastewater. Response surface methodology, particularly central composite design was used to investigate the effect ofFe/H2O2 and H2O2/COD in assessing treatment process efficiency. Empirical models were developed to describe the relationshipbetween the factors and responses. The models were validated through analysis of variance and were further used in pro...
Autori: Azmi Aris, Mohd Ariffin Abu Hassan, Sharifah Hanis Yasmin Sayid Abdullah, Siti Fadilah Md Noor, Zainura Zainon Noor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26307

AbstractIn the present study, batch adsorption experiments were performed for the removal of methylene blue (MB) dye from its aqueoussolution using newly prepared surface modified cashew nut shell (SMCNS) by varying the operating parameters like solution pH,adsorbent dose, initial dye concentration, contact time and temperature. The SMCNS has been prepared by treating the cashewnut shell with the sulphuric acid. Adsorption equilibrium data were analyzed by the model equations such as Langmuir,Fr...
Autori: Krishnan Gayathri Lashmi, Muthukumar Priyadharshini, Ponnusamy Senthil Kumar, Ramasundaram Vijayakumar Abhinaya, Subramanian Sivanesan, Vishwanathan Arthi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26309

AbstractThe biosorption equilibrium isotherms of copper ions from wastewater onto date stones (DS) and palm-trees Waste (PTW) inaqueous solution over a range of temperatures between 25 and 70°C were studied and modelled. To predict the biosorptionisotherms and to determine the characteristic parameters for process design, five models frequently used in the literature -Langmuir, Freundlich, Temkin, Sips and Redlich-Peterson were applied to experimental data.The Langmuir’s model gives the most acc...
Autori: Fatiha Mechati, Fatima Addoun, Mejdi Jeguirim, Meriem Belhachemi, Zohra Belala
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26319

AbstractThis research introduces a new Robust Interval Type-2 Fuzzy Set Linear Programming (R-IT2FSLP) model to manage irrigationwater resources. This method improves upon previous interval fuzzy bound models by allowing uncertainties presented asmultiple fuzzy boundaries. It creates additional degrees of freedom and enable direct modeling of uncertainties within anoptimization framework. It more explicitly reflects the system’s uncertainties under the fuzzy membership function. The more ofR-IT2...
Autori: Guohe Huang, Lei Jin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26324

AbstractThe biosorption characteristics of Cd(II) ions using the NaCl-treated Ceratophyllum demersum were studied. The effect ofaltering the conditions, such as solution pH, the biosorbent dosage and contact time for the biosorption of Cd(II), and thebiosorption/desorption studies, were investigated. Langmuir, Freundlich, Dubinin-Radushkevich and Redlich–Peterson modelswere applied to describe the biosorption isotherms. Langmuir model fitted the equilibrium data better than the other isotherms(R...
Autori: Ali Akbar Babaei, Mehdi Ahmadi, Nadali Alavi, Nemat Jaafarzadeh, Pari Teymouri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26331

AbstractStudies about the adsorption behavior of Cu(II) on D151 resin were conducted. Parameters including the effects of pH,temperature, contact time and initial metal ion concentration were studied by batch methods. Results showed that the adsorptionwas strongly dependent on pH of the medium, and the maximum uptake was obtained at pH 6.90. In the batch system, the D151resin exhibited the highest Cu(II) uptake as 277.8 mg/g at 318K, calculated by the Langmuir model. The adsorption kinetics were...
Autori: Caiping Yao, Chunhua Xiong, Xinyi Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26333

AbstractIn this study artificial neural network (ANN) has been applied to predict noise pollution level in Chandigarh, a newly plannedcity of India. Factors that predominantly influence noise pollution level in a traffic noise model framework were classified intotwo categories: traffic volume and traffic speed. Volume, speed and noise level data of traffic were collected at nine identifiedlocations in the city. For development of ANN model, classified traffic volume (Car/Jeep/Van, Scooter/ Motor...
Autori: Kranti Kumar, Manoranjan Parida, Vinod Kumar Katiyar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26336

AbstractLead (II) can bind with papain at its active site, destroying the enzymatic activity. Papain a sulfhydryl protease has beenimmobilized in calcium alginate bead for the purpose of removal of lead (II) from industrial waste water. Effect of lead (II) onthe enzyme activity of immobilized papain, has been observed. A detailed kinetic study has been carried out and the data arefitted to different kinetic models. EDS (Energy Dispersive X-Ray Spectrometry) and desorption study suggest that meta...
Autori: Aparupa Bhattacharyya, Parameswar De, Soumasree Chatterjee, Srabanti Basu, Susmita Dutta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26338

AbstractPredicting the precipitation evolution is of big importance, especially for the regions affected by drought, where the irrigationsystems are necessary. Dobrudja is a region situated in the South – East of Romania, where the drought period is about 6 monthper year. Therefore, finding a model for the precipitation trend is the first step on understanding the weather evolution and itsprediction. In order to evaluate the precipitation variability in Dobrudja the annual and monthly precipitat...
Autori: Alina Bărbulescu, Judicael Deguenon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26341

AbstractThe removal of phosphorus by strongly basic anion exchanger was investigated. Removal efficiency increased with contact time,resin mass and initial solute concentration, while temperature showed a reverse effect. Equilibrium data were best fitted ontoLangmuir isotherm model (R2>0.99). Maximum sorption capacity of the resin was 66.22 mg/g, namely significantly higher thevalues reported in the literature. The Freundlich parameter (n = 4.3) and the Langmuir separation factor (RL = 0.067-...
Autori: Abdeltif Amrane, Hamid Reza Ghaffari, Mansur Zarrabi, Mohammad Mahdi Soori, Mohammad Noori Sepehr, Saied Borji
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26343

AbstractGuazuma ulmifolia seeds activated carbon was modified by sulphuric acid to enhance the adsorption capacity for Cu(II) ions.This modified activated carbon produced from Guazuma ulmifolia seeds (GUAC) was investigated by observing the changes inits characteristics and the Cu(II) adsorption behavior. The prepared GUAC was characterized by BET, FTIR and SEM analysis.The kinetic data were analyzed using four adsorption kinetic models: the pseudo-first and pseudo-second order equations,intrapa...
Autori: Muthukumar Priyadharshini, Palanichamy Baskaralingam, Palanichamy RajKumar, Ponnusamy Senthil Kumar, Selvaraj Dinesh Kirupha, Subramanian Sivanesan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26344

AbstractThe discharge of industrial effluents is a growing concern for companies, policy makers and the sanitary water system due to thepossible damage to environment. In Spain, wastewater discharge made into the sewer network is regulated locally by the SanitaryTax (ST). Consequently, for the latter, regulation and cost differences exist. In this paper, the role of Spanish STs to promoteenvironmental protection through the treatment of industrial wastewater (IWW) is analyzed. The study is focus...
Autori: Irene Carra, Isabel María Román Sánchez, José Antonio Sánchez Pérez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26350

AbstractIn the context of the complexity of the environmental system, this paper addresses the problem of environmental modeling,considering the global aspects of sustainability as well as the linkage between environmental and economic issues. The survey onintegrated modeling highlights that the complexity of the environmental problems should be approached on the basis of multidisciplinarycooperation and studies. Furthermore, the European environmental standards and products quality standards im...
Autori: Ion Viorel Matei, Laura Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26356

AbstractEnvironmental regulation and its impact on corporate performance have attracted both the Government’s and the academia’sgrowing focus. The “Porter Hypothesis” theory shows that environmental regulation would exert direct impact on corporateperformance, while technology progress would compensate for it indirectly. In this paper, we completely and specificallyexamines those two effects by setting the three models and creating the interaction variable in the third one. The panel data from20...
Autori: Chengming Huang, Hong Li, Wei Liu, Xianqi Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26358

AbstractTo deal with the undesirable factors in Data Envelopment Analysis (DEA), a non-linear DEA model was previously developedfor a paper production system, where the desirable outputs are increased and the undesirable outputs are decreased for efficiencyimprovement. To convert the proposed non-linear model into a linear one, a linear approximation to the non-linear constraint isused and an approximate efficiency score is obtained. In this paper, we propose a new method to solve the non-linear...
Autori: Jie Wu, Zhixiang Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26363

AbstractUndesirable outputs are increasingly considered in data envelopment analysis (DEA) for environmental performance assessmentbecause of hot environment issues. However, many practical conditions are not considered during modeling undesirable outputtogether with desirable outputs and inputs. In this paper, we presented several new approaches with considering weightconstraints between undesirable outputs and inputs. Then we constructed cross-efficiency models for measuring eco-efficiency.Fin...
Autori: Jing Yang, Xianguo Li, Zhixiang Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26366

AbstractCatalytic wet oxidation (CWO) of phenol was studied in the present work. The effect of liquid hourly space velocity (LHSV),superficial gas velocity, reactor pressure, temperature and initial phenol concentration on phenols removal was investigated.Results showed that phenol conversion increased with increasing reaction temperature, reactor pressure, and superficial gasvelocity of oxygen, yet it decreased with increasing (LHSV). The results exhibited that the highest phenol conversion of(...
Autori: Farah T. Jasim, Luma S. Ahmed, Mohammad F. Abid
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26381

AbstractWork accidents prevention is one of the strongest paradigms of safety management. When developing its own mental accidentcausation model, the occupational health and safety professional should acknowledge the benefits and drawbacks of the variousavailable models, to be able to critically assess the most fitted risk assessment tools for practical applications. Nevertheless, heshould be skilled enough to make the difference between "what is happening?" and what "should happen?" in the work...
Autori: Roland Iosif Moraru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26396

AbstractThe study on the kinetics of reactive extraction of rosmarinic acid with two extractants, Amberlite LA-2 and D2EHPA,underlined the strong influence of extractant type, solvent polarity, and 1-octanol content on the relative magnitude of thediffusional or kinetic resistances and on the interfacial reaction rate. Thus, indifferent of the extractant type, the highest values ofinterfacial mass flows and reaction rates have been reached for extraction in dichloromethane. The addition of 1-oct...
Autori: Mădălina Poştaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26412

AbstractThis paper describes the application of a specific model and software designated as EVASAN to identify, assess and prevent theoccupational health and safety risks in the Romanian health care sector, developed in the POSDRU/81/3.2/S/48872 projectCOMPEFSAN by the "Alexandru Darabont" National Research and Development Institute on Occupational Safety Bucharest,in partnership with the "Carol Davila" University of Medicine and Pharmacy Bucharest, the Romanian Institute on Economical -Social R...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26419

AbstractThis paper proposes a tridimensional mathematical model for water migration time in a soil sample, as a prerequisite for thestudy of migration of various liquid pollutants in soil. The variables taken into consideration were measurement position, soiltype, porosity and the height of soil column. The mathematical models were elaborated and tested based on experimental data,assisted by TableCurve 3D software for generating linear and non-linear equations. The proposed mathematical models o...
Autori: Alexandra-Dana Chiţimuş
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26425

AbstractThe purpose of this article is to elaborate a mathematical model for the prediction of average monthly environmental/outsidetemperature (T) levels in the region of Ruse, Bulgaria. Based on the method of harmonic analysis, amplitudes and phases of themain harmonic oscillations were defined. The results show the dominance of the first three harmonics for the period of theresearch. Visualization of experimental and theoretical values of the model shows a high degree of consistency between t...
Autori: Stoyan Yanev
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26446

AbstractUnderground space represents an area with multiple management problems, mainly related to water resources management,difficulties for new underground constructions (as diaphragm walls, tunnels, dewatering systems etc.), interpretation of hydrogeologicaldata or influence of the new constructions on the existing ones. The management of this area is even more difficultdue to the multitude of works, of the (sometimes) chaotic development, of the poor legislation, various ownerships of the la...
Autori: Loretta Batali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26449

AbstractIn the present work, the kinetics of amaranth dye biosorption onto the roots, stems, leaves and the whole plant of water hyacinth(Eichhornia crassipes) were studied for differential evaluation of the plant’s biosorptive potential to remove the toxic dye fromaqueous solutions. E. crassipes´ leaves showed the highest level of amaranth dye biosorption (43.1 mg/g), followed by the entireplant (31.18 mg/g), the roots (28.51 mg/g), and finally by the stems (23.97 mg/g). The same differential t...
Autori: Imelda Guerrero-Coronilla
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26463

AbstractThe main purpose of the present work was to evaluate the potential of plum (P. domestica L.) tree bark (PDB) to remove Cr(VI)and total chromium from aqueous solutions in batch systems. Experimental data showed that the Cr(VI) and total chromiumremoval capacity was dependent on operating variables such as PDB particle size, PDB pretreatment, solution pH, initial Cr(VI)concentration, and contact time. The mechanism of Cr(VI) removal by PDB implies two simultaneous processes: 1) the reducti...
Autori: Perla Vianey Lopez-Nuńez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26464

AbstractWastewater treatment processes with activated sludge are described in the specialized literature by complex models withnonlinear parameterization, such as for example Activated Sludge Model ASM1, ASM2 or ASM3. Under these conditions, thedesign of control structures using the state space representation is very difficult. Suitable techniques to approach the control ofthese processes are using control structures based on an input-output model or using control structures obtained without eve...
Autori: Daniela Carp
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26470

AbstractA series of experiments were performed to quantify the adsorption of Cesium on Silica impregnated withtrihexyl(tetradecyl)phosphonium chloride (Cyphos IL-101). Non-radioactive cesium solution was used as a surrogate of theradioactive 137Cs. The obtained impregnated Silica with the studied ionic liquid was characterized through scanning electronmicroscopy, energy dispersive X-ray analysis and Fourier transform infrared spectroscopy in order to put in evidence that theimpregnation with the...
Autori: Adina Negrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26473

AbstractThe performance of some complex coagulants derived from weak and medium anionic polymers and medium cationic surfactantin coagulation-flocculation process for water treatment was experimentally investigated by carrying out kinetic studies and bydetermining the optimum coagulant dose. The complex coagulants were prepared from weak anionic and medium anioniccopolymers of acrylamide and sodium acrylate with the commercial names Praestol 2515 and Praestol 2540, and mediumcationic surfactant ...
Autori: Constantin Bobirică
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26478

AbstractIn this study, the reduction of phenolic compounds and other organic pollutants from greenish black (GB) and dark brown (DB)olive mill wastewater (OMW) was investigated. Ultrasonic irradiation in combination with aerobic biodegradation was adoptedas the treatment technique. Operational parameters such as the duration of ultrasonic irradiation, ultrasonic power intensity andultrasonic frequency were tested to determine their effects on phenol, BOD, and COD degradations. It was found that ...
Autori: Zakaria Al-Qodah
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26484

AbstractTetracycline (TC) are used as bacteriostatic agents, inhibits the synthesis of bacterial proteins, with activity against awide variety of organisms with application in human and veterinary medicine. The presence of TC in theenvironment constitutes a serious problem, being weakly metabolized or absorbed into the human or animal bodycon. TC residues even in low concentration may produce serious toxic and other effects on humans and livingorganism. In this study are presented the applicatio...
Autori: Carmen Ionela Brînzilă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26513

AbstractThe impact of modern structures on the environment during the building process and actual life-cycle becomes more and more ofa problem and needs to be minimized using unconventional architectural and building solutions, materials and overallacknowledgement of the whole concept.This study has the task of determining the feasibility of a modern earth sheltered house solution by comparing its thermalperformances and environmental impact to a conventional above-ground building solution. Alth...
Autori: Horia Tundrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26517

AbstractThe adsorption potential of 10 wt.% COOH/TUD-1 material for removing Cd2+ from aqueous solutions was investigated via thebatch technique, and the effects of pH, temperature and contact time were studied. Experimental data showed that the maximumCd2+ adsorption, 90%, occurred at pH 6. The adsorption equilibrium was reached within 35 min for 10 wt.% COOH/TUD-1. Theadsorption mechanism was investigated in terms of its thermodynamics and kinetics. The adsorption data were fitted using theLan...
Autori: Nabila Bensacia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26558

AbstractGraphene oxide (GO) was prepared from expandable graphite by a modified Hummers’ method and characterized by TEM,XRD, FTIR, and Raman spectroscopy. The batch adsorption experiments were carried out to study the effect of variousparameters, such as the initial concentration, adsorbent dosage, initial pH, contact time and temperature on adsorption propertiesof cationic red X-GRL onto GO. The Langmuir and Freundlich models were used to fit the experimental data of adsorptionisotherms. The k...
Autori: Jiankun Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26570

AbstractThere is an increasing social and political awareness of the importance of sustainable innovations. Strategic partnerships betweenpolicy makers, businesses, researchers and citizens are keys to developing, implementing and applying eco-innovation, essentialfor the transition to a competitive green economy. Within this innovation ecosystem, universities can play a central role increating viable alternative models that are driven by environmental sustainability.Based on evidence from the f...
Autori: Francisco José Sáez-Martínez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26571

AbstractThe problem of noise levels in the home is of increasing interest for reasons of health and psychological well-being, amongothers. This study analyses in detail the meta-data compiled in the Spanish Census of Population and Housing, which provideddata on a large number of environmental variables, including noise pollution in the home. A geostatistical study is conductedfrom the data provided by the latter survey, in which spatial autocorrelation is measured by analytical techniques by us...
Autori: María-Dolores Huete-Morales
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26575

Abstract Biodegradable chitosan was used to cover fertilizer granules with an inert, impermeable layer in order to obtain a material with controlled release properties. The process was performed in a laboratory drum granulator. Prepared materials were characterized with available analytical methods (XRD, optical microscopy). The layer thickness of the obtained materials was in the range of 0.047 – 0.5425 mm. The degree of nutrients' release (0.64-0.965 within five hours) were deter...
Autori: Krzysztof Lubkowski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26583

Abstract This study evaluates the potential of Crambe abyssinica press cake, a residue from crambe oil extraction and/or biodiesel production, as an adsorbent for removal of cationic dyes from wastewaters. Batch adsorption tests were performed at 30, 40 and 50oC. Adsorption kinetics and equilibrium were satisfactorily described by the pseudo second-order and Freundlich models, respectively. Adsorption was spontaneous and exothermic. Fixed bed adsorption (breakthrough curve) was satisfactoril...
Autori: Adriana S. Franca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26597

Abstract Air temperature is certainly the most measured surface meteorological parameter and accurate forecasting of air temperature is usually performed worldwide. This fact inspired the idea that a predicted value of air temperature may be used as input in solar radiation air temperature-based models, aiming to generate the reference solar radiation year or to forecast solar irradiation. Following this, a Takagi-Sugeno fuzzy model for estimating global solar irradiation via air temperature...
Autori: Remus Şt. Boata
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26599

Abstract The objective of this study is to develop a mathematical model which would confidently predict the rate of substrate degradation of an oil-water emulsion in a laboratory-scale completely-mixed continuous flow reactor using the photo-Fenton treatment process. Two models are developed from first principles and the predicted substrate removal rates for both models are compared with experimental data. The principal conclusions of the study are that both models produce good correlations ...
Autori: Maha A. Tony
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26613

Abstract The present study deals with the removal of Cr (VI) from aqueous solution by polypyrrole (PPy). Response surface methodology (RSM) was applied for the design and analysis of experiments in the optimization of pH, temperature, initial concentration, contact time and adsorbent dose during the removal of the Cr (VI). The optimum adsorbent dose, temperature, initial concentration of Cr (VI), pH and contact time were found to be 0.8 g, 46.5 oC, 187.5 mg/L, 5.3 and 15.4 min respectively. ...
Autori: Ehsan Hasani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26614

Abstract This study is focused on the dissolution kinetics of zinc oxide in ammonium acetate solutions to recover the zinc from alkaline and zinc-carbon spent battery powders. This study represents a first step for further studies in which actual waste powder is to be used. Therefore, the experiments were performed by using pure zinc oxide powder to evaluate the dissolution behavior of zinc. The effects of ammonium acetate concentration, reaction temperature, stirring speed and solid to liqu...
Autori: Nizamettin Demirkıran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26618

Abstract The feasibility of catholyte-conditioning to enhance the electrokinetic (EK) remediation of cobalt and lead polluted soil has been investigated in this study. Electrokinetic experiments were conducted using an EK cell 10 cm in width, 10 cm in height, and 50 cm in length. Plate type electrode of graphite was used as electrode material. Two experiments were conducted under constant voltage condition (2 V/cm). The pH values of the soil significantly affect the removal of Co and Pb ions...
Autori: Mahdi Bahemmat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26623

Abstract Malathion is a toxic, wide-spectrum organophosphorus pesticide. The removal of this pesticide from water is one of the major environmental concerns. In this study, the biodegradation of malathion using batch activated sludge was studied. The effect of initial malathion concentration (5 to 140 mg/L) on the degradation process was investigated. The biokinetic parameters (rs max, Ks and Ki) were estimated. Identification of dominant bacterial flora was also achieved. In addition, two k...
Autori: Djaber Tazdaďt
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26625

Abstract Activated carbon was prepared from renewable plant material, that is Euphorbia rigida, by chemical activation using zinc chloride as activating reagents. The adsorption of Basic Blue 9 (BB9) onto activated carbon was investigated in a batch system with respect to contact time, pH and temperature from aqueous solutions. The experimental data indicated that the adsorption isotherms are well described by the Langmuir isotherm model and the calculated maximum adsorption capacity of acti...
Autori: Özgül Gerçel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26627

Abstract During the creation of a product, the majority of the enterprises still apply a linear approach. This approach has been imposed by the organization way of the company and by the informational flow between the different departments. In the present time different models of integrated engineering oppose to the sequential organization. These models permit the simultaneity of the activities deploying or at least their partial overlap. The activities overlap can be imagined eliminating fi...
Autori: Petrică Corăbieru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26633

Abstract Molinate (S-ethyl-azepane-1-carbothioate) is a thiocarbamate herbicide used in rice cultivation for the control of grass weeds. Environmental contamination with molinate is of major concern due to the adverse effects described both for humans and animals. Molinate hydrolase, a novel amidohydrolase previously characterized, is responsible for the initial breakdown of molinate, cleaving the thioester bond of molinate, releasing ethanethiol and azepane-1-carboxylate (ACA). Biotechnolo...
Autori: Ana M. Paiva
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26642

Abstract The capacity of ion exchange resins, MN 500 and C100 H, for the removal of copper ions from aqueous solution has been investigated under different conditions, namely: initial solution pH, initial metal-ion concentration and contact time. The adsorption of Cu(II) on these resins follows the first-order reversible kinetic. The film diffusion of Cu (II) in these ion exchange resins was shown to be the main rate limiting step. The studies showed that these cation exchange resins can be ...
Autori: Cristina Modrogan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26658

Abstract Environmental contamination by antimony has been described as a critical issue in many articles. In this study, the Sb(III) removal by two brown algae, Sargassum muticum and Aschophylum nodosum, has been tested. Algae were collected in Viana do Castelo beach (Portugal). Preliminary tests were carried out and, based on the results, Sargassum muticum was chosen for subsequent experiments. Kinetic data were described by pseudo second order model. After about four hours contact time the...
Autori: Gabriela Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26659

Abstract Adsorption equilibrium and effective diffusion coefficients of water vapor, in cylindrical particles of activated alumina (A) and activated alumina impregnated with calcium chloride (MCA), are experimentally determined. The experiments were conducted at 303 K and 323 K using cylindrical particles with 2.5 mm in both length and diameter. Diffusion coefficients were determined from the kinetics of water sorption. The measurements were conducted in a constant pressure unit based on a m...
Autori: Eugenia Teodora Iacob Tudose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26665

Abstract The development of biodiesel industry in the recent past brought into discussion the valorization of glycerol as the byproduct of this technology. Dehydration of glycerol leads to acrolein, mainly used as a raw material in the production of acrylic acid and its esters. Several research efforts dealing with the synthesis of acrolein from glycerol are reported in the literature. However, they are limited to catalyst testing on laboratory scale, no attention being paid to the process f...
Autori: Ionut Banu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26666

Abstract Succinic acid is widely used in different industries, its demand increasing each year. Therefore, efficiently producing it (especially from bio-regenerable sources) is an aspect that researchers try to solve thorough different methods, one of the approaches consisting in using process models for generating predictions and improving production by process optimization. In this work, a combination of two bio-inspired algorithms represented by Artificial Neural Networks and Clonal Selec...
Autori: Elena-Niculina Drăgoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26669

Abstract The present work investigates the performance of Cristal-RightTM CR100 zeolite based on the equilibrium and thermodynamics water softening process. The commercial zeolite was characterized by scanning electron microscopy combined with energy dispersive X-ray spectroscopy and FT-IR spectroscopy. The equilibrium performances of zeolite were evaluated by the sorption capacity of calcium cations from calcium chloride solutions varying the calcium concentrations corresponding to moderate...
Autori: Liliana Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26670

Abstract The experiments on the olive oil mill wastewater treatment for removing the lipids by anaerobic and aerobic biodegradation with mixed Bacillus spp. culture indicated that the rate of the aerobic process is up to two times higher than that of the anaerobic one. In this context, it was found that the influence of the dissolved oxygen concentration on the lipids biodegradation process is significant, but the kinetic model given in literature does not consider this parameter. Therefore,...
Autori: Ramona Mihaela Matran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26674

Abstract In the present paper we studied the competitive transport of p-nitrophenol (pNP) and 2,4-dinitrophenol (2,4-dNP) from aqueous media using the technique of liquid membranes. This technique is very efficient, economic and selective when compared to other removal techniques of phenolic derivatives. The paper presents the influence of the sodium carbonate concentration from the stripping phase, the influence of the concentration ratio [2,4-dNP]/[pNP] upon the selectivity of the transpor...
Autori: Ioana Diaconu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26681

Abstract β-galactosidase from Aspergillus oryzae was strongly immobilized on magnetic particles functionalized with amino groups. By simple incubation without any activating agents, electrostatic interactions between amino groups and enzymes allowed obtaining a strong linkage. The immobilization efficiency was studied with the quantification of amino groups of the particles and of immobilized β-galactosidase. Kinetic parameters, especially the maximal velocity Vmax and the affinity...
Autori: Kalim Belhacene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26682

Abstract Data envelopment analysis (DEA) has been recently utilized as a multiple criteria tool for environmental performance evaluation by incorporating undesirable outputs. Most DEA models to measure environmental performance follows the assumptions of crisp data and radial measures. In this paper, we present a fuzzy non-radial DEA approach with Russell measure for environmental performance evaluation. A pair of bi-level mathematical programs is formulated to calculate the lower and upper ...
Autori: Zhongbao Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26691

Abstract In the process of chitin extraction, shrimp shell powder was treated by Lactobacillus plantarum culture. The efficiency of microbial demineralization (DM) under aerobic and anaerobic conditions was investigated. The shrimp shell powder was incubated at 30 °C for 6 days with L. plantarum. In order to prepare microbial culture, inoculums size was 5% for culture inoculation. Date syrup with total reduce sugar concentration of 30 g.L-1 was used. The value of pH in anaerobic conditio...
Autori: Marjan Khorrami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26692

Abstract In many coastal areas strong currents may occur from tidal effects, rivers discharges and high waves breaking due to abrupt changes in local topography. The modification of the wave fields by currents and vice versa need to be predicted by reliable nonlinear numerical models, when wave and current coexist along and around the approach tracks of the ports and harbors, or in the areas of ongoing offshore and coastal developments, or in areas subjected to intense navigation. Various wa...
Autori: Angela Ivan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26695

Abstract In the present work, the removal of cadmium ions from aqueous solution using an agricultural waste as biosorbent, namely trunk palm fibers was investigated. The adsorption equilibrium and kinetics for this system were studied. Four adsorption models were applied to understand the nature of the adsorption process. Freundlich adsorption isotherm was found to best fit the experimental data. The maximum adsorption capacity was found to be 23.8 mg/g. The adsorption process was found to b...
Autori: Hosam Altaher
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26699

Abstract This paper proposes an expert system based on Artificial Neural Networks (ANNs) to model road traffic noise. Feed-Forward Neural Networks (FFNNs) that are trained with the Levenberg-Marquardt back-propagation algorithm were used. Models were evaluated using mean squared error (MSE) and coefficient of determination (R2) as statistical performance parameters. In traffic noise modelling, the noise level at a receptor position due to the source of traffic emission is modelled as a funct...
Autori: Leila Khouban
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26700

Abstract The main purpose of this paper is to assess the concentration levels of pollutants at six urban sites in Bucharest, Romania in order to draw conclusions on their temporal variability in different sources and under different meteorological conditions. The analysis of measured pollutant concentrations (NOx, NO2, CO, PM10) runs over three years: 2005, 2006 and 2007, and uses data from the network of monitoring stations of Environmental Protection Agency of Bucharest, which was establis...
Autori: Sabina Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26701

Abstract In this study, the efficiency of Fenton’s process to remove nickel (II) from industrial plating effluent was investigated. The effect of pH, contact time, concentrations of Fe2+ and H2O2 were surveyed. Kinetic experiments were performed in order to predict the nickel (II) removal rate from wastewater. At pH 1 to 4, nickel (II) removal efficiency increased and declined at pH > 4. The maximum nickel (II) removal efficiency was 98% at 60 min contact time, pH: 4, and Fe2+ and H...
Autori: Mohammad Malakootian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26704

Abstract This research evaluated two electrokinetic remediation systems (EKR) for separating phenanthrene from bentonite and its electrochemical destruction by using a Boron Doped Diamond (BDD) electrode. The effect of the electrochemical potential for the oxidation of phenanthrene in liquid phase with Ti/BDD was analyzed by Normal Pulse Voltammetry and Hydroxyl Radical (●OH) analysis using the Spin Trapping Technique. The results showed that 70% of phenanthrene was removed from benton...
Autori: Alejandro Medel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26710

Abstract Locally sourced clay from Kuala-Kangsar town in Perak state Malaysia was used in both its raw (RKKC) and modified (MKKC) form as adsorbents for the removal of methylene blue (MB) from synthetic textile wastewater in batch adsorption process. The raw clay was modified through H2SO4 acid treatment, Al(OH)3 ion exchange, calcinations and then molded into beads before freeze drying. The BET surface areas of RKKC and MKKC were 11 and 100 m2/g, respectively; their elemental analysis and ...
Autori: Manase Auta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26717

Abstract Maximum removal (94±1.2%) of 2, 4 dichlorophenol (50 mg.dm-3) was achieved on silica with agitation of 4 hours, at pH 8 and 42°C. The positive enthalpy (ΔH) and negative free energy values (ΔG315K) suggested the endothermic and a spontaneous nature of sorption. The free energy of the process at all temperature was negative and increased with the increase in temperature. The values of free energy suggested a spontaneous process where the spontaneity decreased w...
Autori: Abdul Ghaffar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26718

Abstract This study was carried out to investigate the adsorption of methylene blue (MB) onto pumice powder, as a low-cost adsorbent for the removal of dyes. The experiments were designed based on a central composite design (CCD) and the process was analyzed and modeled using response surface methodology (RSM). In order to study the adsorption process, three important factors viz. pumice dosage (20- 50 mg/50mL), MB concentration (20-40 mg/l) and contact times (5- 35 min) were chosen as varia...
Autori: Kiomars Sharafi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26729

Abstract The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of anionic textile dye (Acid Red 88) onto montmorillonitic clay from aqueous solutions. The parameters of pH, initial dye concentrations, temperature, and the adsorbent dosage were investigated experimentally. Four kinetic models including pseudo-second order, pseudo-nth order, Bangham’s equation and double exponential equation (DEE) were selected to follow the adsorption process. ...
Autori: Sedef Dikmen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26731

Abstract In paper processes, the variability of effluent composition and flow is impossible to predict and generally depends on the type of production method used and the manufacturing breakdowns suffered. Wastewater treatment plant operators find it difficult to maintain the efficiency of biological treatment processes. This paper focuses on activated sludge treatment modelling of paper mill wastewater to provide operators with additional support. Based on both standard activated sludge mod...
Autori: Catherine Cadet
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26732

Abstract Chitosan and keratin were tested as low cost biosorbents to remove phenol from water solutions at variable temperature (20- 50°C), initial phenol concentration (10-90 mg L-1) and pH (5.0-10.0), and fixed biosorbent dosage (10 g L-1). The pseudo-second order kinetic model exhibited the best fit to the experimental data and allowed estimating theoretical values of sorption capacity of 4.51 mg g-1 with keratin and 2.87 mg g-1 with chitosan. Equilibrium isotherms, described at best ...
Autori: Attilio Converti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26743

Abstract MFe2O4 nanopowders (M = Ni, Co, Cu) were prepared using the precursor technique, starting from the corresponding metal nitrates and poly(vinyl alcohol)-PVA. During the heating of metal nitrates- PVA solution, a redox reaction takes place around 150°C, leading to the formation of M(II) and Fe(III) carboxylates. These compounds were used as precursors for the ferrites nanopowders. The desired ferrites were obtained by thermal decomposition of the carboxylates; the obtained...
Autori: Marcela Stoia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26745

Abstract The present work systematically investigates the photocatalytic degradation of carbamazepine (CBZ), an organic compound, known as refractory to the conventional wastewater treatment by the titanium dioxide PC 500 catalyst. The effects of some fundamental operating parameters in heterogeneous photocatalysis were investigated in this work in order to determine the main ones affecting the degradation kinetics. The obtained results clearly showed that the removal rate of the target comp...
Autori: Lidia Favier
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26754

Abstract The research is focused on the relationship between aviation systems and extreme terrorist events, the impacts of such events, and the solutions to manage the associated risks on medium and long term. The development of predictive models for extremeasymmetric events in aviation (EAEA) still represents an emerging direction of interdisciplinary research because not all mechanisms and interactions are understood. The testing of models is difficult due to lack of data and interpretatio...
Autori: Catalin Cioaca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26762

Abstract It has been recently shown that acid activation enhances the ability of zeolitic tuffs to bind weak organic bases. More specifically, tuff containing acid-resistant zeolites (i.e. clinoptilolite) exhibits higher sorption capacity than chabazite/phillipsite-rich tuff. Based on the above considerations, we investigated in depth the adsorption behaviour of two pesticides onto acid-activated clinoptilolitic tuff under different experimental conditions. The pesticides simazine and boscal...
Autori: Stefano Salvestrini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26791

Abstract In this paper, the structure and working principles of a microbial fuel cell (MFC) are analysed, and a mathematical simulation model of MFCs is established based on the electrochemical equation, kinetic equation and material balance equation of a MFC. A simulation analysis and discussions are conducted in a MATLAB environment to investigate the effect of acetate concentration, influent flow and external resistance on the performance of a MFC system. The simulation model is demonstra...
Autori: Aimin An
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26803

Abstract The uncertain phenomenon is very complex and using only fuzzy or random variable cannot describe it appropriate. In addition, low carbon is the requirement of the supply chain. In order to overcome those two issues, this paper describes the uncertain phenomenon in supply chain design under fuzzy random environment and constraints on CO2 emission. It considers that the demand rate is a fuzzy random variety, and builds a mixed integer optimization models featuring multiple products, m...
Autori: Zhixue Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26808

Abstract The uncertain phenomenon is very complex and using only fuzzy or random variable cannot describe it appropriate. In addition, low carbon is the requirement of the supply chain. In order to overcome those two issues, this paper describes the uncertain phenomenon in supply chain design under fuzzy random environment and constraints on CO2 emission. It considers that the demand rate is a fuzzy random variety, and builds a mixed integer optimization models featuring multiple products, m...
Autori: Zhixue Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26824

Abstract There is an increasing variety of hydrometeorological information sources available for operational water management. These comprise in-situ measurements, Earth Observation, meteorological models, and hydrological models. The effective use of all these information sources together is challenged by two aspects. First, there is an information and communication technology (ICT) challenge of acquiring, processing, merging, and presenting the various data streams operationally. Secondly,...
Autori: Isnaeni M. Hartanto
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26827

Abstract Models are very important in the development of information systems for water management and they concern not only hydrology aspects, but also representations of complex software applications. Their conception requires big and orchestrated efforts of various stakeholders, like hydrologists, software and electrical engineers, emergency professionals, GIS specialists and ecologists. Water management blends multi-disciplinary aspects; therefore software analysis and design for this dom...
Autori: Anca Daniela Ionita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26829

Abstract Water Distribution Networks (WDN) are large-scale systems whose management is a complex task, with increasing environmental and socio-economic implications worldwide, and with a renewed considerable attention by all stakeholders: local authorities, regulators, environmental groups and the scientific community. WDM managers need to reliably estimate the water demand in the short-term (typically 1 day ahead), in order to operate their reservoirs and treatment plants appropriately to ...
Autori: Antonio Candelieri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26830

Abstract Decision support systems (DSS) have been wildly developed in the recent decades, in various areas of decision making. In the 21st century, the advances in Information and Communication Technology (ICT) have brought the era of cloud computing, in which network-distributed resources (simulation and optimization models, data, etc.) are integrated in decision support applications. The aim of the present article is to present the application of web-based decision support systems (WBDSS) ...
Autori: Quan Pan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26832

Abstract Urban environments present unique opportunities for developing new system architectures and applications aligned with the “Internet of things” paradigm. The data sources are still largely provided by physical sensors and technical devices, albeit a significant role is already played (e.g. in environmental monitoring networks) by virtual or soft sensors provided by simulation models, while a growing role is being played by human data generated thru participatory platforms...
Autori: Francesco Archetti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26833

Abstract The recycling of plastic waste is important both in the conservation of resources and the environmental protection. A plastic waste (PE/PP/PS/PVC) was pyrolyzed over a series of post-use FCC catalysts using a fluidizing reaction system similar to the FCC process operating isothermally at ambient pressure. Experiments carried out with these catalysts gave good yields of valuable hydrocarbons with differing selectivity in the final products dependent on reaction conditions. A model ba...
Autori: Ta-Tung Wei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26836

Abstract Solar energy is one of the most important renewable resources due to its unique set of advantages. In urban configurations, wide open spaces used for parking areas close to malls, stadiums and industrial areas become justified challenges in revaluating them by placing solar panels on their wide roofs. The paper is a first attempt that reflects the scientific interest in the particularities of wind action upon the solar panels sustained by structural framed elements and which cover ...
Autori: Elena Axinte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26849

Abstract This study concentrates on the reactive biosorption of dyes such as Reactive Red 3:1 (RR3:1), Reactive Orange 13 (RO13), Reactive Blue 13 (RB13), Reactive Blue 72 (RB72). The modified fungal biosorbent, Paecilomyces sp., had a higher dye biosorption yield in our study. 100% of biosorption yield observed on RR3:1 and RB13 and 94.09% of color removal of RO13 with the chemically modified biosorbent were great. Also, such modified biosorbent exhibited remarkable performance in simulate...
Autori: Ahmet Çabuk
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26860

Abstract The first step for scientific and sustainable aquaculture development is appropriate site selection, and the success or failure of any aquaculture development largely depends on the right selection of the site. Due to favorable climatic conditions, suitable water quality, soil high natural productivity and space availability, the long southern coastline of Iran is regarded as highly suitable for aquaculture development. Site selection can be viewed as a multi-criteria decision makin...
Autori: Freydoon Vafaie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26866

Abstract Safe operation of highly thermally sensitive industrial reactors is still considered a major issue in chemical engineering practice. The problem becomes even more stringent when highly exothermic reactions are conducted under randomly fluctuating operating variables, and especially when the set-point is located in a close vicinity of the runaway boundaries for increasing the reactor productivity. This study is aiming to derive the runaway boundaries and their associated region of co...
Autori: Constantin Muscalu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26884

Abstract The results of batch tests of anaerobic dechlorination on groundwater samples collected downgradient from an industrial site in Northern Italy are presented and discussed. The experiments were carried out using sucrose as electron donor at equimolar concentration and at selected excess with respect to the total reducible species. The purpose of the study was to investigate the effectiveness of sucrose to achieve a complete chlorinated solvents degradations at the specific site, and ...
Autori: Luca Di Palma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26895

Abstract In this study, activated carbon was synthesized from durian peel and used for the removal of lead (II) ions from water. The activated carbon was produced with physical activation method using CO2 as the activating agent at 900 oC. Prior to the activation process, durian peel was carbonized under either nitrogen atmospheric or vacuum pyrolysis in order to compare the properties of the synthesized activated carbons. Suitable adsorption kinetics and isotherm models for the lead (II) re...
Autori: Samorn Hirunpraditkoon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26901

Abstract The ethanol-gasoline blends have brought new challenges to the in-cylinder mixture air-fuel ratio control for the variable fuel characteristics especially in the traditional PFI (Port Fuel Injection) SI (Spark Ignition) engines. This paper studied all the dynamic links in the intake fuel transfer process from the fuel injectors to cylinders, including the wall-wetting effect and injector fuel flow characteristics. A wall-wetting fuel film evaporation model and an injector fuel flow ...
Autori: Dongwei Yao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26918

Conductive-diamond electrochemical oxidation processes are promising technologies for treating biorefractory industrial wastes with organic loads below 20000 mg L-1. In this work, electrochemical oxidation of a real industrial pharmaceutical wastewater with conductive-diamond anodes has been studied. The electrolyses were carried out in discontinuous operation mode under galvanostatic conditions, using a bench-scale plant equipped with a single compartment electrochemical flow cell. For optim...
Autori: Joaquín Ramón Domínguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26927

Photodegradation caused by sun irradiation may be of major significance in the natural elimination process of pharmaceuticals and personal care products (PPCPs). The fate of metronidazole (MET) in surface water under solar irradiation was investigated. Several parameters affecting the photochemical degradation rate of MET were investigated, including the initial pharmaceutical concentration, continuous input and the presence of other pharmaceuticals like tinidazole (TNZ) with similar structur...
Autori: Bo Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26928

Aniline is a priority pollutant, which is known as a toxic organic pollutant released as effluent from several industries. Several physicochemical methods have been used for degradation of this pollutant. In this study, photocatalytic degradation of aniline from synthetic wastewater by ZnO nanoparticle was considered. The effects of different variables, such as irradiation time, the amount of photocatalyst, initial pH values and initial concentration of pollutant on the photodegradation of an...
Autori: Ahmad Jonidi Jafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26929

The biosorption of a basic dye, safranin from aqueous solutions by marine fungus Aspergillus wentii, which was chemicallymodified by esterification of the carboxylic acids (CB), or methylation of amine (NB), or raw biomass (RB) was investigated. The equilibrium was established after 40 min and the experimental kinetic data obtained for various forms of A.wentii were applied to the pseudo-first order, pseudo-second order, Bingham and Weber-Morris kinetic models. The pseudo-second order model ...
Autori: Yasmin Khambhaty
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26930

Adsorptive removal of dibutyl phthalate (DBP) by bamboo biochar (BC) was investigated under various experimental conditions. BC demonstrated excellent sorptive ability to remove DBP from the aqueous solutions. The removal of DBP by BC increased as the contacting time increased and reached an equilibrium value after 240 min. The presence of natural organic matter decreased the removal efficiency while increased the time to reach sorption equilibrium. The adsorption of DBP on BC could be well ...
Autori: Junliang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26934

In this paper, the classical adiabatic model was chosen. The assumption of perfect gas working fluid was replaced by that of a real gas working fluid. This last assumption was defined by the van der Waals state equation. A Gamma type Stirling engine functioning with a maximum filling pressure of 10 bars was used to carry out experiments. Both theoretical models: the Perfect Gas Adiabatic Model (PGAM) and the Real Gas Adiabatic Model (RGAM) were applied to the Gamma Stirling engine. The influ...
Autori: Ramla Gheith
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26937

The influence of key process parameters of homogenous catalytic ozonation using ferrous or manganese catalysts on the mineralization rate of salicylic acid (SA), model pharmaceutical pollutant, in water was investigated. In order to assess the combined influence and interactions of studied process parameters as well, the empirical/statistical approach applying Box- Behnken experimental design (BBD) combined with response surface methodology (RSM) was applied. Three numerical and one categori...
Autori: Kresimir Koricic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26939

Because of their toxic effects on the food chain and sources of water, antibiotics are potential pollutants that represent an important environmental problem. The objective of this research was to study the adsorption of penicillin G (PEN G) onto chestnut shell using a batch adsorption system. Maximum adsorption was achieved at pH 3.0. The equilibrium uptake capacity (mg/g) increased with increasing levels of initial penicillin G concentration. The uptake capacity of penicillin G onto chestnu...
Autori: Amir Sheikh Mohammadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26940

In this study, response surface methodology (RSM) method was applied based on a five-level and four-variable central composite design. The optimization of the C.I. Direct Red 81 (DR81) removal by the combination of electrocoagulation (EC) and UV processes was also performed. The effect of initial pH, reaction time, current density and initial dye concentration on the dye removal was investigated to obtain the optimal experimental conditions. The optimal conditions with the dye removal of 95% ...
Autori: Elmira Pajootan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26942

The grafted polymer of P(MMA-MAh)- PEGME synthesized was used as adsorbent to remove phenol in aqueous solution. Through the adsorption research of phenol, it was found the removal percentage (%) of phenol was promising when pH was less than 6. With the adsorbent dose increasing, the removal percentage increased, meanwhile the adsorption amount qe (mg·g-1) correspondingly decreased. It was taken 35h for the phenol adsorption with the grafted polymer to reach the equilibrium. The study...
Autori: Yun Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26966

Cameroon's coast that is located in the Guinea Gulf oil region was exposed to hydrocarbon pollution due to oil exploitations and other petroleum activities. The intrinsic biodegradation of hydrocarbons is essential for the depollution methods of the marine environment. Nevertheless, these do not represent a common practice in Cameroon. This study aimed to assess the capacity of bacteria of Cameroon’s waters coast to degrade gasoline and diesel. The kinetic degradation of gasoline an...
Autori: Lucie Leme Banock
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26983

The adsorption characteristics of nitrate ions from aqueous solution using Lewatit FO 36 was investigated as a function of pH, biomass dosage and contact time. Results showed that optimum conditions were obtained at pH 8, adsorbent dosage of 160 mg/L and contact time of 60 min. At the optimized experimental parameters, the maximum nitrate adsorption capacity of Lewatit FO 36 was 200 mg/g and nitrate adsorption followed Freundlich model. Among seven kinetic models used in this study, the adso...
Autori: Mehdi Ahmadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26996

This paper presents a mathematical model developed to solve the problem of adequate blending composition for copper smelting process and it is exclusively for the purpose of the case study in "RTB BOR" (Copper Smelter in Bor). The model proposes an objective function, which maximizes the profit by calculating both the “penalties” for the hazardous concentrate elements and “benefits” for the useful ones. Apart from the basic constraints of the existing mathema...
Autori: Ivan Jovanović
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27002

In this study the immobilized waste black tea (Camellia synensis) was used as biosorbent for the removal and recovery of Al(III) and Cr(VI) ions from the synthetic aqueous solutions. Batch experiments were conducted to optimize the various biosorption parameters that affect the biosorption capacity of immobilized waste black tea. Maximum biosorption capacity was found with a biosorbent dose of 0.1g/100 mL for both metal ions. Optimum biosorption capacity for both Al(III) and Cr(VI) ions was o...
Autori: Haq Nawaz Bhatti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27004

Rice is one of the main staple foods in China and plays an extremely important role in ensuring the country’s food security. Therefore, the impacts of climate change on rice yields have garnered considerable attention. In this study, meteorological and rice yield records during 1951-2011 from the Reclamation area (RA) and general agricultural area (GAA) in the Heilongjiang province of Northeast China were used to assess the impacts of climate change on rice yield trends using multiple r...
Autori: Yang Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27019

The aim of this study was the diversification of fodder yeast assortments with viable economic effects while reducing the pollution to the environment by capitalisation of wastewaters with high monosaccharides content from pulp and paper industry. As inoculum, in the bioreactor, a mixture of two species of yeasts Candida utilis and Candida arboreea (1:1 ratio) was used at 38°C, pH 5.5 and an air flow of 0.02 L/h was insured. Wastewaters from technological process of pulping of softwood wi...
Autori: Andrei I. Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27028

Maghemite nanoparticles (γ-Fe2O3) were synthesized in order to be used as magnetic adsorbent for two heavy metals, Pb(II) and Zn(II), from aqueous solutions. γ-Fe2O3 was prepared from magnetite nanoparticles and was tested for single and binary aqueous solutions. Efficiency removal (%) for single solutions appears only after 10 minutes and was higher than 80%. In case of binary solutions, same results regarding efficiency removal were registered after 60 minutes, being almost 90% ...
Autori: Ecaterina Matei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27029

Knowledge of the basic levels of heavy metal concentrations in soil and their spatial disposition, on a certain area, is particularly important for economic activities, but especially for preventing and stopping pollution. The spatial distribution maps, obtained by measurements performed (of a certain density), cover the entire studied area and are very useful. According to the literature several methods are known for building such maps, most of them based on a simple mathematical interpolati...
Autori: George-Călin Rogozan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27031

Removal of Cd(II) from aqueous streams is of special concern because of its very high toxicity and persistent nature. The sorbents based on natural and waste materials have very promising performances in the treatment of Cd(II) contaminated waters. Very few reviews are available that provide valuable information on the various aspects of the utilization of natural and waste materials for Cd(II) metal ions removal. In this context, this review examines a wide range of materials as green sorben...
Autori: Lavinia Tofan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27033

The generation of energy via fossil fuel burning results in carbon emissions. These emissions contribute to the climate change of our world, particularly in terms of global warming. On the contrary, energy has become blood of life for the existence and functioning of our built environments. In order to control carbon emissions, the UK has taken lead among many countries around the globe and especially in Europe by passing a bill for the Climate Change Act 2008 which legally binds the UK to at...
Autori: Talib E. Butt
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27045

This paper present first results of a study, on the determination and use of the deviations of the vertical for obtaining an accurate geoid in Romania, as a future goal. For the beginning, the study occurred on a limited area of about 22000 km2 in the south part of Romania, including the capital Bucharest. We used data from three different sources: historical astro-geodetic deviations of the vertical (before 1990), deviations derived from two global geoid models (Gravity field and steady-stat...
Autori: Octavian Bădescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27047

There are many models developed for the adjustment of the 2D or 2D+1D geodetic networks, both on the ellipsoid surface and in the map projection plane. These models are widely used by practitioners. In this paper we presented two new mathematical models for the adjustment of combined geodetic measurements and networks (those collected using Global Navigation Satellite System (GNSS) technology plus earlier terrestrial methods). Such combined networks can be adjusted either in a Cartesian geoc...
Autori: Andrei-Șerban Ilie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27051

In this paper, the steps used in the process of building 3D model creation, using images acquired with the UMK 10/1318 metric terrestrial photogrammetric camera and digital images acquired with the Canon EOS Rebel XSi/450D digital non-metric camera, are presented in detail. For the calibration process of both cameras, the Heikkila and Silven algorithm and a 3D calibration object were used. In order to save time, both on the field and back to the office, instead of taking and processing UMK im...
Autori: Ersilia Oniga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27056

In this paper both kinetic and thermodynamic parameters of thermochemical transformation of waste tires are evaluated by using thermogravimetric analysis (TGA). For rubber thermochemical decomposition, individually and in the presence of other tires components, some kinetic and thermodynamic parameters such as energy of activation (Ea), frequency factor (A), reaction enthalpy (ΔH), entropy (ΔS) and free energy (ΔG) have been calculated by using the integration method. The e...
Autori: Sana Kordoghli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27060

Urbanization and industrialization have led to the increase in impervious surfaces, the reduction of water seepage into soil and the increase of runoff discharges in urban areas. The overland flow may be carried over long distances along the streets and sidewalks depending on the land slope and morphology, while in lowland, water tends to accumulate in ponds. In this research, we aim to identify these ponds in the floodplain, slope and urbanized interfluves in Cluj-Napoca. The ponds outline t...
Autori: Ionel Haidu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27063

Quantification of geomorphological changes and rates of landscape evolution is a matter of primary importance, as much in natural hazards studies as in calibration of landscape evolution models. In this paper it is investigated the influence of dams to morphological processes on a corrected torrential valley situated in mountainous area of Romania. Several approaches were applied for evaluating the stream bed dynamics by using terrestrial measurements and GIS techniques. The methodology is b...
Autori: Mihai-Daniel Niţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27064

Dam’s behavior monitoring is highly influenced by the existence of an appropriate instrumentation system installed in structure’s body, its foundation and in the neighboring area as well as by the periodical acquisition, collection, processing and interpretation of data. Existing monitoring systems may be enhanced with mobile labs that can perform regular or special measurements. Hybrid models appear to be an attractive option for the evaluation of the static and/or the dynamic be...
Autori: Altan Abdulamit
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27065

Corporate Social Responsibility (CSR) is implemented unevenly in the Spanish tourism industry. The country’s hotel infrastructure is not an exception. Many researchers have focused on finding out to what extent the implementation of CSR is ideal from a hotel management perspective and what its effects and consequences are. To a lesser extent, this work has analyzed how and how much consumers rate socially responsible actions, particularly those associated with the environment, society a...
Autori: José Mondéjar Jiménez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27077

This study highlights the potential use of yellow Zea mays seed chaff (YZMSC) biomass as a biosorbent for the removal of Cr3+, Cd2+ and Pb2+ ions from aqueous solutions. Fourier transformed Infrared analysis of the biomass suggests that YZMSC biomass is basically composed of cellulose and methyl cellulose. The biosorption capacities, qmax, of YZMSC biomass for Cr3+, Cd2+ and Pb2+ are 14.68, 121.95 and 384.62 mg/g respectively. Biosorption equilibrium was achieved at 20, 30 and 60 min for Cr3+...
Autori: Jonathan Oyebamiji Babalola
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27083

This work evaluates the potential of Phyllanthus debilis for the adsorption of Zn2+ and Ni2+ ions using synthetic solutions. Adsorption experiments were performed in order to examine the effect of pH, contact time, biomass concentration and initial metal ion concentration in the removal process, in a batch mode. The results revealed that the adsorption is highly pH dependent. The adsorption of Zn2+ and Ni2+ ions were concentration dependent and increased from 2.446 to 8.688 mg/g for Zn2+ and ...
Autori: Mohammad Aslam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27084

This paper reports the potential of rice husk waste biomass to remove copper (II) from simulated wastewater under different experimental conditions. For this, rice husk has been pre–treated by boiling, formaldehyde and concentrated sulphuric acid. Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy dispersive analysis X–ray analyses were performed before and after adsorption, to explore number and position of the functional groups available for copper ...
Autori: Manjeet Bansal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27095

The concentrations of isopropyl alcohol were monitored during the working time (8 hours) in three different printing plants (two sheet-fed offset and one digital) in Novi Sad, Serbia, using portable gas chromatograph. The concentration levels were below the recommended limits by the U.S. National Institute for Occupational Safety and Health. Unequal presence of isopropyl alcohol in printing plants involved a multiple linear regression analysis of microclimate parameters using program ORIGIN 5...
Autori: Jelena Kiurski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27096

The goal of this paper is to determine the characteristics of a Stirling engine able to be used by a micro-solar power plant as energy conversion system. The purpose is to use solar energy as heat source and a Stirling engine because of its numerous advantages, as its high (theoretical) efficiency. This work was made in collaboration with several industrials involved in the project named MiCST, whom objective is to electrify remote villages in Africa. Results of a simple 0-D model built on M...
Autori: Nadia Martaj
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27116

In this study, the toxic effects of binary mixtures of Pharmaceutical Active Compounds (PhACs) that are observed in the effluents from a wide range sewage treatment plants and surface water bodies were investigated using the bioluminescent bacterium Aliivibrio fischeri (Microtox® test). The selected chemicals were the nonsteroidal anti-inflammatory drug (NSAID) diclofenac sodium [DCF] and the anti-epileptic carbamazepine [CBZ]. In addition, caffeine [CFF], a psychoactive stimulant of the...
Autori: Valeria Di Nica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27126

The removal of quinoline from synthetic wastewater by heterogeneous photo-Fenton in a novel internal circulating fluidized-bed reactor was investigated systematically. The flow field in the reactor was simulated by FLUENT software conjoined with tracer particles experiment, and the influence of reaction parameters such as initial quinoline concentration, catalysts dosage and H2O2 dosage were evaluated. Results indicated that the designed reactor was suitable for the heterogeneous photo-Fenton...
Autori: Ran Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27142

A new material containing 2-(2′ thiazolylazo) p-cresol (TAC) grafted poly acrylamide (PAA) was prepared and its adsorption ability was studied for the removal of inorganic mercury from aqueous media. Adsorption of Mercury (II) ions from aqueous solution was investigated in detail as a function of mercury concentration, pH, ionic strength, and temperature. The adsorption data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. The adsorption of Mercury (...
Autori: Selçuk Şimşek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27170

Equilibrium and kinetics of biosorption of lead(II) from aqueous solutions by local low-cost agricultural by-products – peanut hulls, soybean shells and grapefruit peels were compared to develop high-efficient and low-cost biosorbents for removal of lead(II) from wastewater. Batch kinetics showed adsorption equilibrium at about 90 min and the adsorption process for the three biosorbents was better represented by the pseudo-second-order model than the pseudo-first-order model. Batch equilib...
Autori: Rui Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27176

In this study, chitosan-iron(III) was used as adsorbent of the dye acid red 29. The effect of pH, temperature and concentration of the dye on the adsorption capacity were evaluated. The maximum adsorption capacity was calculated from the adsorption isotherms which were well fitted by Sips isotherm model. The process followed the kinetic model of pseudo-second-order. The activation parameters showed that the adsorption process is spontaneous and favorable. A decrease in adsorption capacity was ob...
Autori: Carla Albertina Demarchi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27181

The adsorption of tartrazine from aqueous solution was evaluated using an iron (III) modified zeolitic tuff. The adsorbent was characterized by scanning electron microscopy and X-ray power diffraction; the modification process does not affect the crystalline structure of the zeolitic tuff. Sorption kinetic, isotherms, dose and pH effects were determined and the adsorption behavior was analyzed. The sorption equilibrium was reached in 72 hours, the adsorption capacity determined by the Langmuir m...
Autori: Adrián Alcántara-Cobos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27182

The aim of this research is to investigate adsorption characteristics of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II) complexes with MGDA (methylglycinediacetic acid) from aqueous solutions by using the multifunctional chelating ion exchanger Diphonix. MGDA, belonging to a group of new generation complexones which readily undergo biodegradation, is patented by BASF and marketed under the brand name Trilon M. Optimum adsorption conditions were determined as a function of phase contact time, ...
Autori: Justyna Jachuła
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27183

The adsorbent gels utilized in this research project were synthesized from non-commercially available chitosan, obtained by deacetylation of chitin, which was isolated from fermented shrimp waste by a major local industrial food biopolymer. Chitosan-based adsorbent gels were used for the removal of a tris-azo dye (Direct Blue 71) from aqueous solutions. Sorption experiments focused on the chemical modification of chitosan using two cross-linking agents, sodium tripolyphosphate (TPP) and glutaral...
Autori: Reyna G. Sánchez-Duarte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27184

Rats (Rattus spp.) can cause substantial economic loss to oil palm (Elaeis quineensis Jacq.) plantations. Spatial occurrence of rat in oil palm plantation has not been adequately dealt. We evaluated the rat occurrence at an oil palm plantation in Sabah, Malaysia using habitat factors from GIS and GeoEye data. Among the regression models examined, binomial logistic regression model best predicted the rat occurrence. Overall accuracy of the occurrence prediction calculated from an independent data...
Autori: Mui-How Phua
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27189

In this work, the effect of cyclic anaerobic/aerobic conditions on the biodegradative capability of the mixed microbial culture for the azo dye Acid Red 18 was investigated in the sequencing batch reactors. For this purpose, five anaerobic/aerobic sequencing batch reactors were operated under the same operation conditions at different anaerobic/aerobic reaction times. The whole reaction time was 22-h with anaerobic/aerobic periods of 6/16, 10/12, 14/8, 18/4 and 22/0 (h/h) in An/ASBR1 to 5, respe...
Autori: Mohammad Hakimelahi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27191

In order to limit personnel exposure to electromagnetic fields, safety standards provide among others, limitations in terms of induced currents in limbs, which is the measurable quantity allowing the evaluation of thermal load in limbs in the real conditions of electromagnetic radiofrequency exposure. Using a clamp-on current meter, eleven subjects were measured for current passing through their feet during the use of backpacked radio equipment, configured in various operating modes while using ...
Autori: Annamaria Paljanos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27204

Various azodyes containing one or more sulfonic groups were removed from aqueous solutions by biosorption on untreated wood shavings from Picea abies. The sorption kinetics was described by the pseudo-first-order (PFO), pseudo-second-order (PSO) and modified pseudo-n-order (MPnO) equations, from which the MPnO model provided the best fit to the experimental data. The surface reaction was identified as a rate-limiting step governing the dye sorption on wood shavings, but a mixed kinetics (with a ...
Autori: Pavel Janoš
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27207

The need to develop models for analyzing socio-ecologically structured strategic portfolios derives from concerns regarding the sustainable development manifested in the current economy. Such models are useful for underlying the strategy of the organizations oriented towards achieving their objectives and the requirements of sustainable development. The model that we propose is based on an algorithm of strategic portfolio classification focused on the organization’s potential of sustainab...
Autori: Oliver Constantin Pricop
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27209

Date pits were used as a low-cost adsorbent to study the effective removal of copper (II) ions in an aqueous solution on the basis of adsorption kinetics and isotherm equations. Before and after the adsorption process, the date pits were characterized by electron scanning microscope (ESM) as well as Infrared spectroscopy (IR). The effects of the pH, zero point of charge, the adsorbent mass, and the adsorbent particle size on the adsorption of copper (II) were also studied. Equilibrium data were ...
Autori: Tarek E. Khalil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27212

In this study, the biosorption of zinc(II) ions from the aqueous solutions by the lichen biomass of Xanthoria parietina (L.) Th. Fr. was studied as a function of contact time, initial pH of metal solution, biosorbent concentration, initial metal ion concentration and stirring speed in a batch system. The optimum pH value for maximum zinc biosorption was found to be 5.5. Concentrations intervals from 50 mg/L to 250 mg/L were tested and it was observed that the biosorption efficiency depends on th...
Autori: Zuleyha Bingul
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27213

Banana stalk (BS) waste is used to remove Pb2+ from aqueous solution. Equilibrium data were analyzed with Langmuir and Freundlich adsorption models, which fit better in the former equation. The qmax (maximum metal uptake capacity) for Pb2+ adsorption was 105.14 mg/g of BS at pH 5.0, which followed pseudo-second order kinetics model. IR spectra confirmed the participation of hydroxyl, amino, and acidic functional moieties in the removal of Pb2+. The major mechanism involved in the biosorption of ...
Autori: Kashif Iqbal Sahibzada
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27214

Adsorption equilibrium, kinetic and dynamic studies were done for removal of zinc (II) from aqueous solutions using alunite ore. The alunite sample was characterized by using X-ray fluorescence (XRF), optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) porosimetry, differential thermal (DTA), and Thermogravimetric (TG) analyses. The batch equilibrium adsorption data of zinc (II) ions onto alunite particles were applied to some...
Autori: Hoda Arabyarmohammadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27216

In this study, Response Surface Methodology (RSM) was applied to investigate both the effects of biodiesel percentage in fuel mixture and engine operating parameters (engine load and engine speed) on emission characteristics (unburned hydrocarbons (HC), CO and NOx) of a diesel engine. The optimization of biodiesel percentage in fuel mixture and engine operating parameters also was performed using the desirability approach of the response surface methodology for lower emission characteristics. Th...
Autori: Alireza Shirneshan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27217

The mixed microbial culture, isolated from the aerobic sludge was used to study biodegradation of 1,1-DCE as the sole carbon source in batch flasks. 1,1-DCE initial concentration in the medium was varied from 100μg/L to 1000μg/L. The maximum removal rate of 1,1-DCE was 89.2% obtained at 400μg/L 1,1-DCE concentration in the medium. The biodegradation kinetics of 1,1-DCE was found to follow three-half-order model at all initial 1,1-DCE concentrations with regression values greater than 0....
Autori: Shizong Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27219

In this research, Response Surface Methodology (RSM) was employed to optimize five operating variables including initial pH, current, reaction time, initial hexavalent chromium concentration and dosage of polyaluminum chloride as a coagulant for the removal of hexavalent chromium and its relative operating cost by electrocoagulation process. Central Composite Design (CCD) was applied for the optimization process. The results showed that increase of polyaluminum chloride dosage was beneficial for...
Autori: Sepideh Sadeghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27230

In this study, an upflow anaerobic sludge blanket (UASB) bioreactor at the mesophilic temperature (38ºC) was successfully used for the treatment of petroleum refinery effluents. Response surface methodology (RSM) was applied for the design and analysis of experiments to predict the behavior of the initial COD and the hydraulic retention time (HRT) in the bioreactor. A statistical analysis indicated that the models adequately represented the experimental data. At the optimal conditions, the ...
Autori: Seyed Omid Rastegar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27233

The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g–1 (for C0 = 100 mg Pb dm–3) to...
Autori: Djordje Stojakovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27234

In this study, silica gel initially reacted with N-(2-aminoethyl)-3-aminopropyl-triethoxysilane and subsequently with formaldehyde resulted in a modified solid that contained amino imine groups, Sil2NCH2. The solids were characterized by CHN elemental analysis, thermogravimetric analysis (TGA/DTG), FTIR spectroscopy, 13C solid-state NMR, and nitrogen adsorption/desorption measurements. The adsorption of Cd(II), Pb(II) and Cr(VI) ions onto Sil2NCH2 in aqueous solutions were examined to study the ...
Autori: Franklin Pessoa Aguiar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27242

The capability of ornamental rocks solid waste (ORSW) as a low-cost sorbent was investigated in order to remove As(V) and Mn(II) from aqueous solution. Physical-chemical characterization analyses of the raw material presented albite and quartz as the main minerals. The solid waste presents low surface area (209.70 m2/g). The Langmuir, Freundlich, Sips (Langmuir-Freundlich), Redlich-Petersen and Tóth models were used to analyze sorption phenomena. The maximum sorption capability from the e...
Autori: Fernando Jorge Santos Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27246

The objectives of this paper are to investigate whether the integration levels achieved by Catalan companies are related to their choice of the options for Management System Standards (MSSs) and to research the relationships of the perceived adequacy of using new MSSs and Business Excellence Models (BEMs) with Integrated Management Systems (IMSs). To test these relationships, data was obtained from 76 organizations which responded to a survey on IMSs, the options for MSSs and the possibilities r...
Autori: Alexandra Simon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27258

This study investigates the adsorption of several metals in aqueous solution, by hemp materials (loose fibre and felted fibre). After characterization of the fibre, an extensive study was conducted on the adsorption properties of this material. The experiments were carried out in poly-metallic aqueous solutions containing Al, Co, Cr, Cu, Ni and Zn at a concentration of 1 mg L-1 and 10 mg L-1 each. The pH effect was found to lead to an optimum between pH 4 and 4.5. The kinetics of the adsorption ...
Autori: Justine Bugnet
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27272

Ammonium is an environmental contaminant encountered in water and soils, its admissible concentrations in soils and waters being established by legislation. Removal of ammonium ions from aqueous solutions from different matrix can be done with several sorbents, among which nano-adsorbents, such as oxidized exfoliated graphite nanoplatelets (ox-xGnP) offer practical solutions, based on their high specific surface area, associated sorption sites and efficiency of application. Several parameters su...
Autori: Daniela Bogdan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27273

Floods have long been the cause of severe human and economic loss. Structural measures are applied to minimize the consequences of these natural disasters. A potential mitigating approach is the design and implementation of a control strategy for the water network aimed to regulate the water flowing within the river catchment system. There are several tools that have the ability to model and forecast the flood events in water networks. However, some tools are limited in the ability of providing ...
Autori: Phạm Thai Hňa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27278

A possible prediction methodology for the concentration of pollutants wave in aquatic environment using Rough Set Theory is presented. The issue is of increasingly importance especially for early pollution risk warning. The hydro-morphologic complex characteristics of surface water bodies should be taken into account when pollution dispersion models are designed. However, when more characteristics/multi-criteria are taken into account, including pollutants physical-chemical ones and their enviro...
Autori: Georgeta Mădălina Aramă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27319

The paper aims to present the sorption properties of two sorbent substrates (composts) prepared by aerobic fermentation from vegetables waste composted with beech sawdust (BR2) and beech ash (BC1) to be used for Cu2+ removal from wastewaters. The composts structures and surface properties were characterised in terms of active groups (FTIR), crystallinity (XRD), morphology (SEM), topography (AFM) and specific surface and pores analysis (BET), and the changes in properties after Cu2+ sorption were...
Autori: Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27323

Drilling waste management for oil and gas industry involves collection, transportation, processing, recycling, disposal, and monitoring of waste materials in order to reduce their effects on health and environment. In the Exploration and Production industry, environmental concerns have made effective management of drilling waste at well sites a great priority. Effective waste management is thus a key element in a successful drilling project. The industry therefore relies on effective expertise a...
Autori: M. Enamul Hossain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27375

This study models the potential effect of various fuel treatments on crown fire behavior by using two crown fire simulation models in Aleppo pine (Pinus halepensis Mill.) stands. Fuel complex characteristics that influence fire behavior were measured in a representative Aleppo pine stand in northern Greece, using standard surface and canopy fuel inventory methods. Nine different fuel treatments (control, prescribed burning, controlled grazing, thinning without slash removal, thinning with slash...
Autori: Ioannis D. Mitsopoulos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27382

Effective adsorbents were developed from sewage sludge by chemical activation with different activators (5M ZnCl2, 3M H2SO4, 3M H3PO4, 5M ZnCl2: 3M H2SO4, and 5M ZnCl2: 3M H3PO4). The developed adsorbents were used for the removal of the heavy metals Cd (II), Pb (II), Cu (II) and Mn (II) from wastewater. The effect of several parameters (pH, initial metal ion concentration, adsorbent dose, contact time and solution temperature) on the metal adsorption capacity were evaluated by batch experiments...
Autori: Mohamed Nageeb Rashed
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27385

The kinetics of azo dye reduction based on combined effect of biochemical reduction by anaerobic mixed culture and chemical reduction with hydrogen sulfide was investigated. Hydrogen sulfide was produced by sulphate reducing bacteria existing in the anaerobic mixed culture. The effect of initial anaerobic biomass, initial substrate, and initial dye (Reactive Orange 107) concentrations on reduction kinetics were studied with batch assays. The municipal waste sludge was used as electron donating s...
Autori: Umay Gokce Ozkan-Yucel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27386

Sharing economy business experiences are rapidly rising worldwide and deeply changing structures and models of customers purchasing attitudes and needs. Inspired by principles of sustainable consumption, its starting point is the idea that every underutilized resource is a wasted resource. Beyond the digital services implemented by sharing platform, there are also social and physical places where communities are experimenting the potential of collaborative and innovative solutions: purchasing...
Autori: Paola Sposato
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27417

A worldwide trend is leading the international community to explore the possible paths for the transition from a linear to a circular economic model. Recent studies identified the main enabling factors to facilitate this transition, among which closed loop logistics models and new service-based and function-oriented business models play a significant role. The diffusion of new business models relating to the use of a product rather than its ownership can indeed reduce material consumption and th...
Autori: Maria Grazia Gnoni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27418

This paper presents the decolorization of p-Dimethylaminobenzalrhodanine using titanium dioxide nano-particles under photocatalytic process at various buffer media under air atmosphere. Several effective agents including nano-photocatalyst loading, illumination time, pH of medium and initial dye concentrations have been subjected to be estimated. Furthermore, kinetic investigations of photocatalytic process fitted the pseudo-first-order kinetic for dye decolorization at all considered buffer ...
Autori: Morteza Montazerozohori
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27423

In this work, magnetic alginate was synthesized by encapsulating of Nickel Zinc Ferrite nanoparticle within Ca-alginate. The synthesized magnetic alginate was modified by ethylenediamine using microwave radiation to remove anionic dye from wastewater. The characteristics of magnetic nanoparticle, magnetic alginate and magnetic alginate amide (MAA) were studied using Fourier transform infrared (FTIR) and Scanning electron microscope (SEM). FTIR analysis confirmed the amidation of alginate. Di...
Autori: Niyaz Mohammad Mahmoodi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27424

Decolorization of C.I. Acid Orange 7 (AO7) via TiO2-assisted photocatalysis under UV illumination in the presence of H2O2 has been investigated. The effect of pH on decolorization efficiency of AO7 was investigated in TiO2/UV/H2O2 process. The performance of TiO2/UV/H2O2 system was also evaluated by using synthetic dye-bath effluent of AO7. Solar driven TiO2 photocatalysis was found significantly efficient for the decolorization and degradation of AO7. The rates of decolorization and degrada...
Autori: Ozlem Esen Kartal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27433

Removal of the heavy metal ions from water disposals remains a widespread problem due to their adverse influence on public health. The most harmful materials are the products of nuclear fission called radioisotopes such as cerium ions. Cerium barely interacts with adsorbent materials, therefore the new substances capable to bind cerium are of great interest. Ca and Na alginate samples were incubated in Ce3+ solutions; adsorption capacity was measured and the results were evaluated using Langm...
Autori: Maxim Khotimchenko
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27435

The Artificial Neural Network (ANN) model was used to predict dye (Reactive Blue 19) removal efficiency from aqueous solution using modified pomegranate residual based on 124 experimental sets. Three-layer ANN models with different neurons numbers at a hidden layer were developed. The optimum network yielded a network error of 0.0054 and 0.9606 for mean square error and coefficient of determination, respectively. Furthermore, sensitivity analysis of the network revealed that the adsorbent do...
Autori: Elham Radaei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27439

Despite the industrial decline, air pollution continues to be a major issue in Romanian cities. As in many other urban areas, in Iasi city the traffic is one of the main sources of air pollution which has a high environmental impact, also exposing population’s health to a high risk. The study focuses on the small scale examining the spatial and temporal variability of air pollution in a very important and frequently circulated crossroad, Podu de Piatra. Using various data from air pollu...
Autori: Alexandru Banica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27443

This paper reports an improved chlorolignin (CL) oxidative decolorization in alkaline media by the use of a heterogeneous system consisting of hydrogen peroxide and a silica [bis(dibenzoylmethido) copper II] (S1) catalyst. The catalytic functions of S1 in the presence of H2O2 were evaluated by comparing the chlorolignin decolorization in media with and without addition of catalyst. Since decolorization is associated with CL degradation, the pH variation and chloride release assays were carrie...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27448

Soil erosion by water, sediment transport, sediment deposition and their impact on watershed area are complex processes. Therefore, the state of theoretical knowledge and mathematical modeling of them are still in an incipient phase. Most of the existing mathematical models are based on relations obtained either experimentally or in laboratory conditions, either in situ or physical models; because of existence of multitude factors involved in these processes and influence each other. These m...
Autori: Erika Beilicci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27449

The negative effects of acid mine drainage (AMD) on the natural and human environments are well understood in South Africa, yet a robust and economic AMD treatment technology has not been developed. The current study aimed at exploring the performance of synthetic zeolite F9 in AMD treatment with specific focus on iron and manganese removal. For this, batch adsorption mode was adopted for which the effects of adsorbent dosage, initial pH and temperature were investigated. As a result, it was fou...
Autori: Mike Masukume
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27454

This study assesses the feasibility of using the filamentous fungus Fusarium solani for the removal of colour, chemical oxygen demand (COD) and total phenols from a pulp mill industry effluent, inoculated in a rotating biological contactor (RBC). The study was done in a RBC of total volume 7.2 L, operated with 40% of useful volume at 37(±2)°C, inflow 3.5 L d-1, hydraulic residence time (HRT) 20 h and rotation speed 2 rpm. A Haldane model was used to determine the kinetic parameters of...
Autori: Alberto Vergara-Fernández
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27456

This paper displays the kinetics of the corrosion process for short-term immersion of seven mild steel samples of similar compositions. A comparison between the data obtained for corrosion process in three types of water: bidistilled water (BW), drinking water (DW) (tap water) and river water (RW) (from Bahlui River, Iasi, Romania) has been done. Electrochemical techniques such as the cyclic voltammetry (CV), the linear voltammetry (LV) and the rotating disk electrode technique (RDE) have been u...
Autori: Alexandra Ciomaga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27460

Municipal Solid Waste (MSW) disposal is currently one of the major environmental issues in big cities. Several tools and techniques have been developed for Environmental Impact Assessment (EIA) of MSW disposal options, including scoping, checklists, matrices, qualitative and quantitative models and decision-support systems. Rapid Impact Assessment Matrix (RIAM) is a partially new method which is particularly advantageous over others as it provides a transparent and permanent record of analysi...
Autori: Zohreh Aliakbari-Beidokhti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27465

In recent years, increasing temperatures and extreme weather conditions have had a significant impact on quality of life, especially in terms of the environment. Governments have made environmental preservation a priority and have received public support in turn. We formulate models to investigate a company’s optimal production quantities over two periods, including green technology efforts, to examine the impact of a carbon trading policy. We build separate inter-temporal production mode...
Autori: Changsong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27469

Three modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), cetyl trimethylammonium bromide modified bentonite (CTAB-Bent), and both cetyl trimethylammonium bromide and hydroxy-aluminum modified bentonite (Al(OH)-CTAB-Bent) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) analysis. Batch experiments were conducted on the adsorption of phenol at different temperatures, pH and initial concentration. The results indicated that adsorption capacity o...
Autori: Xiping Luo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27481

An experimental design methodology was applied to study the copper removal from aqueous solutions by immobilized nanoscale Lentinus edodes. The effect of the various variables (biomass loading, initial metal ions concentration, PH, contact time, agitation speed and temperature) were studied in the batch experiment. The results showed that pH, contact time and agitation speed were the most significant variables on biosorption of copper ions determined by Minimum Run Equireplicated Res V Design...
Autori: Rong Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27487

An apatitic calcium phosphate gel (HaG) was elaborated and used to treat municipal wastewater in a physicochemical cycle prior to the standard biological degradation process. Preliminary laboratory batch experiments outlined the kinetics of heavy metal sorption by monitoring the concentrations found in filtered fractions as a function of treatment time. On site experiments were performed in a municipal wastewater treatment plant by derivation of real wastewater into an experimental tank. In this...
Autori: Nathalie Lyczko
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27488

This study investigates the dynamic relationship between economic growth, energy consumption, financial development, and CO2 emissions at macro level in the case of 49 countries from Europe and Central Asia over a two-year period. The research focuses exclusively on country-level characteristics and uses a heteroscedasticity-consistent standard error estimator (HC3) to analyze the aforementioned relationship. The proposed econometric models test whether: i) the level of development of financial ...
Autori: Marilena Mironiuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27494

This study evaluated the performances of adsorption and Fenton oxidation for the removal of multilan red (MLR) and multi-active blue (MActB) dyes from aqueous solution. Zeolite, the adsorbent used in the study was modified using two surfactants: hexadecyltrimethylammonium bromide (HDTMA-Br) and cetyltrimethylammonium bromide (CTAB). The modified zeolite characterized using FTIR, SEM and XRD analysis. The modification studies revealed that HDTMA-modified zeolite exhibited better performance than ...
Autori: Jacob Kitinya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27505

This paper investigates the macrophyte Azolla pinnata modified with sodium hydroxide, as a bioadsorbent for Cu2+ and Pb2+ ions in synthetic solutions. Biomaterial characterization was performed using Scanning Electronic Microscopy (SEM); Energy- Dispersive X-Ray Spectroscopy (EDX); Fourier Transform Infra-red (FTIR) spectroscopy techniques and through the blocking of carboxylic and sulfonic functional groups. Kinetics of the process has highlighted a quick and efficient adsorption, even in low ...
Autori: Arielle Barros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27532

A series of column experiments were conducted to study volatile contaminant (benzene) removal and process principles using soil vapor extraction (SVE) under different thermal conditions. Compared with the normal SVE method, two thermal methodssteam injection and electrical resistance heating effectively increased the benzene vapor diffusion and removal rates. The removal efficiency of benzene with the electrical resistance heating method was 96.5%, which was significantly higher than that with t...
Autori: Peng Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27534

The potential use of a novel low-cost adsorbent, Eupatorium adenophorum Spreng, as a solution to remove Cr(VI) ions from aqueous was reported. Effects of various regulating parameters, such as pH value of reaction, adsorbent dosage and temperature, were investigated. To fit the adsorption equilibrium data, Langmuir isotherm and Freundlich isotherm were invoked. Additionally, thermodynamic parameters of the adsorption process, such as ΔG, ΔS and ΔH, were also calculated. The res...
Autori: Chen Jin-fa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27535

The aim of this study was to examine the adsorption of malachite green dye from aqueous solutions on the waste foundry sand. The effects of contact time, adsorbent amount, pH and initial dye concentration were investigated. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin adsorption isotherm models. The adsorption capacity of waste foundry sand for the removal of malachite green dye was determined with the Langmuir and found to be 23.29 mg/g. The adsorption isothe...
Autori: Elif Hatice Gürkan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27536

This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm-1, respectively, and the measured surface area was 1.3728 ± 0.0160 m2 g-1, with predominance of microporous < 10.51 Å. ...
Autori: Milene S. Pereira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27540

It is acknowledged that organic fertilizers and wastes, such as animal slurries/manure from intensive farm enterprise, sewage sludge, poultry litter are and will continue to be spread on agricultural land and provide beneficial nutrients to crops. However, many of these materials which are also potentially polluting if not properly managed can pose a risk to groundwater and surface water quality. Generally, their distribution on the soil is performed with specialized machines to reduce the risk...
Autori: Vasilica Ştefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27545

The synthesis and the study of the complexes obtained in this paper represent the beginning of our research for applied coordinative compounds of this type in agriculture. The analysis and the study of Mn(II) complexes with DL-β-Aminoisobutyric acid as ligand were accomplished in aqueous and alcoholic solution and also in solid state.The composition ratios and the stability of the synthesised compounds were analysed with specific methods: conductance, pH measurements, spectrophotometry and ...
Autori: Doina Sibiescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27549

In this study major factors affecting the phenolation process of lignosulfonate (LS) waste liquor (recovered from pulp and paper industry) were optimized in order to improve LS substitution for replacing petroleum-based phenols during phenolic resin manufacturing. Four different parameters, namely phenol/lignosulfonate ratio, time, temperature and lignosulfonate waste liquor concentration, were varied in an experimental program having as response function the reaction yield. Response Surface Met...
Autori: Andrei Ionuţ Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27551

Among the organic pollutants, the chlorinated phenols represent an important class of compounds having a stable world market of ca. 100 kt per year. Due to their aryl structure and presence of the chlorine atom, chlorinated phenols are exceptionally recalcitrant toward chemical reactions aimed at their reduction. Adsorption from liquid phase has received special interest due to its flexibility and simplicity in operation. Especially adsorption using activated carbon (AC) has been recognized by t...
Autori: Marius Sebastian Secula
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27552

Absorption of gases into liquids, with chemical reaction, is an important unit operation useful in many fields, especially synthesis of new products and waste gas treatment. Gas treatment means the separation of pollutants: acid gases, organic sulphur compounds, and other contaminants which may be found in gaseous streams. The absorption into liquid is a process almost exclusively used for removal of contaminants. The removal refers to retention of the majority of acid gases present in high conc...
Autori: Maria Harja
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27555

Two multiple linear regression (MLR) models were developed with the aim to estimate the decomposition temperature of a series of polyimides. Two parameters, Tni and Tai, corresponding to the temperature of 10 % weight loss of the sample, determined by dynamic thermogravimetric analysis under conditions of N2 inert atmosphere and air, respectively, were used as a criterion for thermal stability. The obtained MLR models correlate thermostability with a series of characteristics of the studied poly...
Autori: Catalin Lisa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27556

The solid-liquid extraction process and some of its influencing factors such as solid-liquid ratio, temperature and salt initial amount have been investigated. Also, mathematical modeling for mass transfer coefficients calculation was applied. An inert porous solid material (coal), impregnated with 10% and 20% mass NaCl or 15% and 30% mass CaCl2, was used. The leaching was conducted in a fixed bed column, in laminar flow. The CaCl2 impregnated samples were investigated in a column with a height...
Autori: Marcel Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27557

The potential of Sphagnum moss peat to adsorb oxyanions (As(III), As(V), Sb(III), Sb(V) and Se(VI)) from aqueous solution was studied in batch mode. For arsenic (both species) and selenium, the results were negative: moss peat is not able to retain these oxyanion. For antimony, the hydroxyl and carboxyl groups from the Sphagnum moss peat surface seems to be responsible for Sb uptake. Kinetic studies were conducted for both Sb(III) and Sb(V) and a fast uptake process was observed, equilibrium bei...
Autori: Gabriela Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27565

• Environmental engineering and Management Journal No. 4    • AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II – USER INTERFACE AND FIELD VALIDATION    • COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS    • FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS – A REVIEW    • ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27577

• Environmental engineering and Management Journal No. 4    • AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II – USER INTERFACE AND FIELD VALIDATION    • COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS    • FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS – A REVIEW    • ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27576

In this research, the capability of uranium biosorption by dried biomass of the red algae was investigated in a batch system. For the screening of the most appropriate biosorbent, they were placed in 0.5 mmol/L uranium solution with different pH for 3hrs of contact times. The obtained results showed that the species of the Gracilaria corticata (J. Agardh) are having the maximum rate of the biosorption. Sorption equilibrium was reached within 3hrs of contact time (at pH 4.5), and the results of t...
Autori: Reza Dabbagh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27596

With anticipation of global warming and climate change, quantitative prediction of future precipitation trend is more important than ever. Global circulation models (GCMs) are widely used as the base for simulating climate change. However, due to their coarse resolution, researchers have been using various downscaling techniques to produce finer model for regional use. Recent advancements in metaheuristic algorithms have provided an alternative approach in downscaling. This paper introduces the ...
Autori: Sze Miang Kueh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27604

A new low-cost activated carbon was developed from kiwi peel for removing Pb(II) from aqueous solution. The adsorbent characteristics were determined by different analyses such as BET, FTIR and SEM. The adsorbent demonstrated remarkable characteristics such as high surface area (306.18 m2.g-1) and large total pore volume (0.4810 cm3.g-1). The effect of pH, contact time, initial concentration, shaking rate and adsorbent dosage on the Pb removal efficiency was investigated. It was found that the o...
Autori: Mostafa Rahimnejad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27605

Neural networks are a series of simple mathematical models, created on the architecture of human brain which gives a superior capacity of learning based on numerous connections established among neurons. The artificial neural networks have strong units of processing which are characterized by an extreme simplicity, but because of their whole interaction, the results are complex. The paper presents the comparison of two methods: mathematical regression and artificial neural network, used for pred...
Autori: Daniel Lepadatu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27608

The study of binary biosorption of Pb(II) and Cu(II) was performed by pine nuts shell. Results were compared with the single biosorption of Pb(II) and the single biosorption of the Cu(II). Experiments were performed in batch stirred and in a continuous system. The presence of lead caused a slightly decrease of the copper biosorption yield and can be related to the copper equilibrium uptake. This antagonistic action can be related to competition phenomena between metal ions in solution for active...
Autori: Gabriel Blázquez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27611

β-glucosidases are very important in the improvement of cellulose degradation rates by diminishing the inhibition of end products. Although, cellulase cost has reduced significantly in last decade but still the high costs of biomass saccharification is one of the main challenges for the commercialization of ethanol from LC biomass. In this work, β-glucosidase immobilization in calcium alginate was optimized using response surface methodology. 89% immobilization efficiency was achieved ...
Autori: Ruchi Agrawal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27614

The aim of this study is the treatment of Chlorothiazide in an aqueous medium by Electro-Fenton process using a Platinum anode. This pharmaceutical product is used to treat hypertension. Removal rates and mineralization efficiency have been analyzed under different operational conditions. Degradation kinetics well fitted to a pseudo–first–order reaction. Apparent rate constant of the oxidation of Chlorothiazide by electrochemically generated hydroxyl radicals was determined to be 9.4...
Autori: Saied Taieb
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27616

The thermal degradation of kenaf (Hibiscus cannabinus) under the effect of several variables (particle size, Ar flow rate, sample initial mass and heating rate) was investigated. From experimental data and by application of various model-free methods (Friedman, Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa), the activation energies (EA) were calculated as a function of conversion. The results obtained allowed to conclude that kenaf follows a multi-stage degradation mechanism, with EA values rang...
Autori: Silvia Román
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27617

FLUCTUATION OF RIVER NETWORK WATER ENVIRONMENTAL CARRYING CAPACITY IN A COMPLICATED RIVER-LAKE SYSTEM    • MINERALOGY AND GEOCHEMICAL DISTRIBUTION OF HEAVY METALS FOR THE FAGUL CETĂȚII TAILINGS, ROMANIA    • ACCUMULATION AND AVAILABILITY OF TRACE ELEMENTS FROM SOIL INTO ORIENTAL TOBACCO GROWN IN MACEDONIA    • OLFACTORY EFFECT ON LANDSCAPE PREFERENCE    • EFFECT OF MOLASSES ADDITION AS BIODEGRADABLE MATERIAL ON PHENOL REMO...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27628

Degradation of Clindamycin phosphate (CMP) was studied in aqueous solutions by an anodic oxidation process under galvanostatic conditions. The electrolysis cell consisted of a Ti/SnO2-Sb anode, prepared by dip-coating technique, and a 316 stainless steel cathode, both of which had a surface area of 6 cm2. The effects of critical factors, including CMP concentration, current density, initial pH, and the supporting electrolyte were evaluated. The electrochemical oxidation of CMP was controlled by ...
Autori: Mitra Gholami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27639

The mineralization of azo dyes could be realized through solar photocatalytic degradation that is a green method where non-harmful end products are produced. The aim of this study was to investigate the mineralization of Orange G (OG) and New Coccine (NC) using ZnO as catalyst. The degradation of the azo dyes was conducted at different experimental conditions, and parameters such as effect of sunlight to the degradation rate, initial azo dye concentration, amounts of catalyst dosage, pH and effe...
Autori: Wan Fadhilah Khalik
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27643

This paper reviews the recent developments and implementations for greenhouses facilities, focusing on recent progress regarding greenhouse environment monitoring and control with many available application examples. State of the art and current trends concerning the main parts of the greenhouse environment automation are discussed: i) greenhouse climate models, ii) wireless sensor networks, iii) remote monitoring/command and supervisory control and data acquisition (SCADA) systems, iv) image pr...
Autori: Eugen Horatiu Gurban
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27644

Copper pollution is common across the world and has caused serious public health problems recently. Among the conventional methods, adsorption has proved effective, economic, versatile and simple for the removal of aqueous Cu(II) contaminants. Deposits of natural Kaolin are abundant around the world, and are regarded as valueless due to its limited usage in industry. In this study, the adsorption behavior of natural Kaolin towards Cu(II) was evaluated. According to the results, the isothermal ad...
Autori: Qiang Tang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27651

Eco-industrial parks (EIPs) and other eco-industrial developments have different histories, sizes, locations and organizational forms. In order to characterize them several classifications and models have been elaborated. In this work for the first time the existing European EIPs are overviewed with the help of four classifications. These classifications are based on (1) the stage of the development of the area, (2) the starting point, (3) the activity of the EIP and (4) the location of the comp...
Autori: Ewa Liwarska-Bizukojc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27652

The separate and simultaneous photocatalytic reduction of poisonous Cr(VI) and Ni(II) ions were examined with trace amounts of commercial titania nanoparticles (up to 50 mg/L). A direct irradiation photo-reactor, equipped with ultrasonic source was employed. The effects of four influencing parameters, catalyst dosage, pH, temperature and metal ions concentration ratio were investigated. The simultaneous operations, in the ternary Cr(VI)/Ni(II)/TiO2 system, show a synergism in reduction effici...
Autori: Javad Saien
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27662

This paper proposes a study on the estimation of daily solar irradiation (global and diffuse irradiation) under real-sky conditions and the validation of proposed estimation models by analyzing the most important statistical indicators. Two types of regressions are proposed for the estimation of solar daily global irradiation; the first type is based on the second order degree Ångström-Prescott correlations; the second type uses the second order Ångström-Prescott correla...
Autori: Elena Eftimie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27670

Adsorption, desorption, and kinetics behavior of Gd(III) ion on chelating resin were investigated in this paper. Batch adsorption studies were carried out with different pH, contact time, and temperature. The adsorption of Gd(III) follows the Langmuir model better than the Freundlich model. The apparent activation energy Ea and adsorption rate constant are k308 4.16 kJ/mol and 6.01×10-5 s-1, respectively. Thermodynamic parameters such as ΔH, ΔS and ΔG indicated that Gd(II...
Autori: Leilei Pi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27688

Hexavalent chromium Cr(VI), a constituent of wastewater from many industries, is regulated by the Environmental Protection Agency (EPA) as one of the priority pollutants. Adsorption is an important technique that can be used for Cr(VI) removal from wastewater. The challenge in adsorption techniques is to find a cheap, widely available adsorbent that has a high adsorption capacity to Cr(VI). Dates stones (DS) and palm fiber (PF) are two agricultural wastes that are produced from palm trees. These...
Autori: Reda Abubeah
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27689

The presence of nitrogen in its reduced forms serves as an indicator of natural aquatic system degradation. The excessive concentrations of nitrogen in reduced forms (NH4+, NO2-) found in the sections of the the Shireutsi (of the Prut River) and the Olaneshti (of the Nistru River) prove that these sites are areas to focus efforts on improving water quality. Laboratory simulations indicate a good environmental buffer action of natural waters to potential pollution in Sculeni and Ungheni sections ...
Autori: Petru Spataru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27698

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27782

In the present study, Dowex HCR-S/H, cationic resin was used as a resin for the removal of cadmium from aqueous solutions. The experiments were carried out in a batch vessel. Subsequent experiments were performed as a function of initial solution pH, resin dosage, agitation time, initial Cd2+ concentration, solution temperature and agitation speed. Ion exchange rate increased with the increase in initial cadmium concentration, stirring speed and temperature. The Langmuir, Freundlich, Elovich,...
Autori: Baybars Ali Fil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27777

The adsorption rate and dynamic behavior of the system are important factors as regards the process design and operational control. The aim of this study was to find a suitable kinetic model for the hexavalent chromium removal in a batch reactor. The experimental data were analyzed using four adsorption kinetic models: the pseudo- first and second order equations, the Elovich equation, and the intraparticle diffusion equation, so as to determine the best fit equation of the Cr(VI) adsorption ont...
Autori: Ankica Radjenovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27773

Bare zero-valent iron nanoparticles (bare-ZVIN) have a great tendency to aggregate, which drops their reactivity with pollutants. To address this issue, polyvinylpyrrolidone stabilized-ZVIN (PVP-ZVIN) was synthesized and used for the removal of Cd2+ from aqueous solution in a batch system. The effects of operation conditions such as the pH of aqueous solution (2-8), reaction time (0-120), adsorbent concentration (1-6 g L-1) and the initial Cd2+ concentration (10-60 mg L-1) on the removal efficie...
Autori: Amirhosein Ramazanpour Esfahani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27764

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27729

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27730

The aim of this study is to identify the influential factors which affect the planning and construction process in coastal ecological engineering. Through the application of AHP to analyze weight, it applies the data obtained from descriptive statistics as a reference in decision-making. Research methods are by means of expert questionnaire. To understand the same and different points of views from the experts and scholars, then according to different purposes it uses the results of this study i...
Autori: Chi-Shun Hsu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27732

In this study, the removal of Cu(II) from real industrial wastewater, being taken from galvanotechnic industry, by means of manganese ferrite (MnFe2O4) nanoparticles (NPs) was investigated. The effects of pH, adsorbent dosage, and contact time on Cu(II) removal from wastewater were monitored using the real wastewater while the effect of initial concentration was studied on synthetic aqueous solutions. Optimal conditions were found for copper removal in this study. Cu(II) removal and adsorption c...
Autori: Naim Sezgin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27743

Leather manufacturing process generates significant volume of wastewater. Deliming is one of the unit processes, in which about 4.5 L of wastewater is generated per one Kg of pelt. Reuse of wastewater from the unit processes, where significant volume of wastewater is generated is much important to address pollution mineralization and water conservation. Presence of significant level of organic pollutants is the primary factor that deters reuse of waste streams. In this paper, the Electro-Oxidati...
Autori: Sundaramoorthy Sundarapandiyan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27744

The potential effects of climate change on nutrient (total N and total P) loads in four large-scale (A=2940–6771 km2) river basins in Lithuania were analyzed. The climate impact assessment was based on an ensemble of four (RCP2.6, RCP4.5, RCP6.0 and RCP8.5) future climate projections, representing the averaged outputs from three (GFDL-CM3, NorESM1-M and HadGEM2-ES) global climate models. For each climate projection, near-future (2016–2035) and distant-future (2081–2100) time pe...
Autori: Arvydas Povilaitis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27751

Debris from deciduous trees in the form of park green waste was investigated as a potential biosorbent for the removal of chlorinated solvents from water. The sorption properties of beech leaves and cupules, oak leaves and acorns, birch leaves and lime leaves (all tree species common for a moderate climate) in a non-modified form were investigated with regard to the removal of perchloroethylene, 1,1,2-trichloroethane and 1,1,1,2-tetrachlorothane. The preliminary results showed that these biosorb...
Autori: Marek Tobiszewski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27760

Activated sludge (AS) is the mainly used biological process in water treatment; therefore, assessing the influence of various operating conditions on this process is relevant. This study aimed to evaluate at laboratory-scale the influence of the gas-to-liquid volume ratio (RG/L) and the stirring speed (SS) on the biodegradation of carbamazepine (CBZ) by activated sludge. For this purpose, a central composite design (CCD) was used in association with response surface methodology (RSM). Batch cult...
Autori: Samer Semrany
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27869

In this study, application of integrated anaerobic-aerobic membrane sequencing batch reactor (MSBR) for treatment of an azo dye-containing wastewater was investigated. For this purpose, three lab-scale MSBR systems were operated at various hydraulic retention times (HRT) of 48, 24 and 16 h with constant value of solid retention time (SRT) for all reactors. The treatment performance and the decolorization kinetic of the systems as well the fouling rate of the membranes were evaluated during the e...
Autori: Maryam Hasani Zonoozi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27851

Transesterification is one of the main biodiesel production method that produces huge amount of wastewater due to the high organic substance content (COD =300000-400000 mg/L, oil and grease= 17000-25000 mg/L). Although there are several treatment methods, flotation is the current conventional treatment method for oil and grease (O&G) before the biological treatment. In this study solvent extraction method was developed for pre-refining of biodiesel wastewaters. For the solvent extraction met...
Autori: Pınar Tanattı
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27850

This paper presents a mapping procedure for determining the environmental impact of flooding in spatial planning. This procedure is applied to a section of the Guadalquivir River in the Quemadillas sector of Córdoba, southern Spain, where flood risks are of great importance because of improper riverside planning and the absence of prevention measures. We performed a comprehensive environmental analysis in conjunction with hydrological and hydraulic modelling using GIS techniques, allowing...
Autori: Antonio Miguel Martínez-Grańa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27837

The macrophyte Pistia stratiote was used as biosorbent for the removal of Black Krom KJR (BK-KJR) dye in synthetic aqueous solution. Initially, some tests were performed to verify the best operational conditions such as pH, biosorbent particle size, sorption temperature and stirring speed, which were later used in the kinetic and equilibrium tests. All tests were performed in duplicate. The highest removal rates of the pollutant were achieved at the process conditions of initial pH 2, granulo...
Autori: Aparecido Nivaldo Módenes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27843

Advanced oxidation process is getting tremendous importance in the treatment techniques for the removal of nonbiodegradable organics from wastewater due to its ability to completely mineralize the pollutants. It uses different methods to produce hydroxyl radicals which are responsible for oxidation of pollutants. In this work, studies on Fenton, ultraviolet radiation (UV) and UVhydrogen peroxide processes for removing acetamiprid, a neonicotinoid insecticide from aqueous solution are carried ...
Autori: Puthenkattil Abdukunji Fasnabi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27895

The paper aims to carry out a cross-country analysis of the effects of environmental reporting on company’s market performance. For this purpose, we have used a set of data comprising information on industrial companies ranked in top 150 by net sales for the year 2017 and originating from 15 European countries, for the period 2007-2016. The study included both environmental qualitative reporting based on environmental scores calculated by the authors, and reporting combining qualitative...
Autori: Maria Carmen Huian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27897

The native and surface modified adsorbents from agricultural waste, such as Psyllium stalks (PS) were investigated for their ability to remove the Coomassie Brilliant Blue (CBB) dye from aqueous media. The native and surface modified adsorbents were characterized by the Fourier Transform Infrared spectroscopy (FTIR). The results show that the Sodium Bicarbonate Treated Carbon (SBTC) has good surface properties for the removal of the CBB dye from aqueous media. The SBTC was analyzed by Scanni...
Autori: Premkumar Manickam Periyaraman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27898

This paper presents the results of theoretical estimations of the quantity of landfill gas (LFG), as well as the energy potential of Cell A from the municipal landfill in Oradea city, Romania, based on a mathematical model. Considering three scenarios for LFG recovery according to the capture system efficiency, the following LFG theoretical flows have been obtained: 157 m3LFG/h for 45% recovery efficiency; 209 m3LFG/h for 60% recovery efficiency; and 297 for 85% recovery efficiency, respectiv...
Autori: Gerardo Collaguazo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27903

The influence of initial metal ion concentration and temperature on the adsorption of Zn(II) from aqueous solution onto amino ethyl cellulose (AEC) functionalized with Orange 16 reactive dye, was examined. Batch experiments were performed at pH of 4.0 and adsorbent dose of 8.0 g/L previously established as optimum, ranging the initial Zn(II) concentration between 22.74-181.92 mg/L and temperature between 2 and 60 C. Three isotherm models (Langmuir, Freundlich and Dubinin – Radus...
Autori: Gabriela Nacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27904

Biosorption of copper(II) by lyophilized and thermally treated bacterial biomass of Pseudomonas aeruginosa PAO1 and Pseudomonas fluorescens BME in aqueous suspension was studied. The cell surface properties were characterized and the experimental conditions, e.g., pH, adsorption time, and initial metal concentration were optimized for efficient biosorption. The surface charge was negative at pH above 2.5 for P. aeruginosa, and above pH 4 for P. fluorescens. The highest copper(II) uptake was ...
Autori: Anikó Kőnig-Péter
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27917

This paper applied an artificial intelligence methodology for streamflow prediction in a flash flood in Pinang catchment based on TOPMODEL input and output data sets. TOPMODEL is a semi-distributed rainfall runoff model widely used in numerous water resource applications. However, literature has indicated relative weakness in TOPMODEL performances in streamflow prediction. Thus, radial basis function neural network (RBF-NN) has been employed to improve the accuracy of streamflow prediction an...
Autori: Ali H. Ahmed Suliman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27924

The applicability of an electrocoagulation process with the biological treatment for the color removal of C.I. Basic Red 46 (BR46) dye was studied. It was shown that decolorization efficiency increased by increasing current density (j), pH, temperature (T) and agitation speed (ω) and decreased with the initial dye concentration [BR46]0. The optimal conditions in presence of a grid electrode (waste) used as cathode were found to be j=9 mA cm-², pH 8, T=35°C, [BR46]0=30 mg L-1 an...
Autori: Katia Madi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27927

We assessed the variability of the main physico-chemical parameters of drinking water: oxidability, turbidity, conductivity, water hardness, free chlorine concentration, chlorides and nitrates across the four seasons (Spring, Summer, Autumn of 2013 and Winter of 2014). We collected data from several points in the supply network of Satu Mare city, NW of Romania, where the source of drinking water is groundwater. The results revealed significant higher average values in spring for some of the ...
Autori: Thomas Dippong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27928

Agro-industrial waste are seen as potential precursors in the development of adsorbents for the removal of phenolic compounds, which exhibit a harmful effect to human health due to their high toxicity. This work evaluated the use of coal prepared from coconut tree agro-industrial waste, for the adsorption of phenol in aqueous solutions. Three coal samples were prepared as follows: carbonized only (Cb), activated with synthetic air (Cair) and activated with CO2 (CCO2). Based on the results of ...
Autori: Marta Duarte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27937

The present study explores the potential use of plant waste i.e. spotted golden thistle (Scolymus maculatus L.) stalks, as an inexpensive sorbent for the removal of methylene blue from synthetic aqueous solutions. Firstly, the waste material was characterized using different analysis methods, then kinetics and equilibrium of dye sorption were investigated using a batch sorption technique. The influence of contact time, initial dye concentration, sorbent dose, particle size and agitation speed...
Autori: Zoubida Senouci Bereksi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27941

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27946

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27947

The current paper is an overview on previous and ongoing research carried out by the authors concerning the use of Computational Fluid Dynamics for the accurate classification of hazardous Ex areas generated by flammable gases, for the optimization of computational simulation of air-methane mixture explosions by using ANSYS CFX and FLUENT and for calibrating computational simulations of gas explosions using the Schlieren effect. These research works containing analytic studies have led to the...
Autori: Vlad Mihai Păsculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27962

Being able to estimate the quantity of pollutants that can be spread in the environment is a factor of paramount importance in the industrial panorama. In order to accomplish such aim, a crucial step is the estimation of the so-called source term, that is the rate of generation (or release) of a substance in a generic process. A proper estimation requires to consider both the machinery and the unit operations present into the analysed system. For such reasons, ad hoc considerations and models...
Autori: Marco Barozzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27964

Human behavior in critical situations is at the core of all concerns about the fire safety of buildings, regardless of their destination. The way in which the human caught in the fire reacts to the risk factor to which he is exposed, his behavioral response to the direct action of the fire, or his psychological response to the effect of the fire (temperature, smoke opacity, reduced visibility, exposure to toxic combustion gases), are all factors that can drastically influence the required saf...
Autori: Marius Cornel Şuvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27965

Watercourses that transit rural / urban areas are susceptible to the phenomenon of aquatic pollution due to various types of polluting species. The important issues of river pollution and of polluting species dispersion, require an approach with predictive tools (models for transport of polluting species) which can evaluate the performance of depollution measures/actions to reduce pollution and to take optimal management decisions. Thus, from January 2017 to May 2017, a monitoring investigati...
Autori: Lorand Toth
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27967

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27968

Atrazine is a herbicide used widely with a large quantity in Thailand and can contaminate in surface and groundwater. This work investigated atrazine removal from an aqueous solution by catalytic photodegradation using oxides of metal-cerium-zinc (M-Ce-ZnO, M = Ag, Fe, and Cu). ZnO is texturally modified with sticky rice starch template, doped with cerium (Ce) and either Ag, Fe, or Cu with the M:Ce:Zn molar ratio of 0.005:0.005:1. The catalysts were characterized by XRD, UV-Vis-DRS, and N2 adsor...
Autori: Pummarin Khamdahsag
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27974

In the present work, acid treated natural oil palm trunk powder (OPTP) has been utilized as novel adsorbents for the removal of methyl orange (MO) from aqueous solution. The batch method was employed to study the adsorption behavior of MO which was subsequently determined by UV/Visible spectrophotometer. The adsorption characteristics and operational parameters were determined by monitoring different parameters such as pH, contact time, dye concentration and temperature. The acid treated OPTP an...
Autori: Akil Ahmad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27975

In this study, Coal Fly Ash (CFA), a byproduct of coal combustion power plants, was used as an adsorbent to remove color from locally-obtained pulp mill effluent (PME). Batch adsorption studies were conducted to determine the adsorption parameters that would result in the maximum color removal from PME at the lowest CFA dosage and process cost. The effects of operating variables on color removal were studied by varying: 1) CFA dosage, 2) initial PME pH, and 3) contact time. The findings indic...
Autori: Christopher Willett
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27986

The paper presents the development of a Flood Index (FI) based on the flood hydrograph characteristics, namely flood magnitude ratio, rising curve gradient and time to peak. These characteristic values are normalized to their respective values corresponding to a 100-year flood. The methodology developed to compute FI is applied to three case studies; Kentucky in USA, Oc-gok in the Republic of Korea and Haor in Bangladesh. The obtained results show advantages of the presented methodology over ...
Autori: Biswa Bhattacharya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27992

Little is known about the degradation kinetics of sewage sludge, sanitized with Ca(OH)2, in soil. Thus, this work aimed to monitor the degradation of limed sludge, under field conditions, when applied on soil surface or incorporated into the soil. The limed sludge was applied in dystrophic Inceptisol at a dose of 500 kg ha-1 yr-1 of total nitrogen. The mineralization process in the soil was monitored for 131 days. Samples of organic material were collected for analysis of total and easily oxi...
Autori: Isabela Diniz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27995

This study aims to define a municipal Solid Waste Management (SWM) strategy using Multi-objective Optimization Problem (MOP) and ELECTRE method. Four waste treatment technologies were considered: recycling, composting, incineration and landfilling. Firstly, a Multi-objective Linear Programing (MOLP) model was developed. The solutions obtained from this model were ranked using the ELECTRE method. It was considered as case study a hypothetical city of 1,000,000 of inhabitants, presenting the a...
Autori: Rafaella de Souza Henriques
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27998

This study presents the influence of the storage recipients’ material and of the use and the type of stirring on the drinking water quality. The kinetics of drinkable water quality alteration under stationary conditions and under magnetic and sonical stirring have been monitored for a two weeks period. The microbiological parameters (total number of germs developed at 37°C and 22°C, lactose-positive and lactose-negative bacteria, coliform bacteria and Echerichia coli), as well a...
Autori: Laura Damian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27999

This paper aims to disclose the quantitative relationship between benthic diatom biomass in natural rivers and environmental factors. For this purpose, the author selected seven natural rivers in the basin of Minjiang River as the objects. First, the samples of benthic diatoms and the environmental factors were collected from 14 different sampling sites of five rivers and the diatom density and Chlorophyll a (Chl a) content were selected to characterize the diatom biomass. Then, the number of...
Autori: Baichuan Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28001

Dairy wastewater has been a major environmental concern because of massive effluents characterized by high pollution load. This study reports the influence of initial pH (pHi), residence time (τ) and elapsed time (t) on the %COD removal (Y1) and specific energy consumed (kWh per kg of COD removed, Y2) for real dairy industry wastewater treatment in continuous stirred tank electrochemical reactor (CSTER) using aluminum electrodes. Central composite design (CCD) was applied for designing th...
Autori: Poonam Kumari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28011

This paper deals with the degradation kinetics of an anionic surfactant (sodium dodecyl sulfate, SDS) under UV and UV-H2O2 advanced oxidation process (AOP). Experiments were performed in a batch reactor which emits monochromatic light centered at 253.7 nm. The photon flux of the UV reactor was 1.9(±0.1)×10-4 Einstein/L-min. Under direct UV, only 45% SDS degradation was observed at a fluence of 40.65 J/cm2 for initial SDS concentration of 0.35 mM. The apparent fluence-based pseudo...
Autori: Bijoli Mondal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28013

The coal gas is a potential risk for the safety production in coalmines. The practical experiences in coalmine show that the gas may suffer massive desorption and migration after coal seam mining and deformation of overlying strata. Therefore, gas extraction in mines focuses on mining ground pressure relief gas extraction. In this paper, the study is carried out on gas permeability and migration pathway based on movements of overlying strata over the working face and the spatial location of t...
Autori: Jianwei Cheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28019

The aim of this paper is studying light intensity values which maximize the photosynthesis in microalgal cultures by means of models of the photochemical process and by changing cultures strategies. The photosynthetic performances of Graesiella emersonii under batch, fed-batch, semi-continuous cultivation modes and with only air sparged or CO2 added to air were quantified by means of gas exchange measure and pulse amplitude modulated fluorimetry (PAM); kinetics of the photochemical processes...
Autori: Dora Allegra Carbone
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28037

After the recent global financial and economic crises, unemployment, especially among young people have become a particularly serious problem. Fostering young entrepreneurship represent not only a tool to combat young unemployment and social exclusion but also a way to encourage innovation and a country’s economic growth. Education and training can contribute in building an entrepreneurial society and may shape individuals attitudes versus risk-taking. Risk taken ability is an important...
Autori: Ana Iolanda Vodă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28038

This paper focuses on the effect of some water quality parameters of river water which helps in the calculation of water quality index (WQI) that culminates in the development of a regression model for prediction of WQI of the river system in India. The index was calculated by arithmetic index method using twelve various experimentally estimated water quality parameters such as potential hydrogen, chlorides, dissolved oxygen saturation, nitrates, sulphates, phosphates, total dissolved solids, bi...
Autori: Divya Airattil Haridas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28065

The embedment of circular economy principles in cities is an opportunity to reduce the urban waste production and resource consumption towards closed-loop systems. In particular, the adoption of circular economy strategies as regeneration, optimization, sharing and loops can overcome waste and inefficiencies of linear economy. This paper presents some circular economy practices bringing an integration of circular strategies at urban scale. This work was funded by the Research into Electrical Sys...
Autori: Francesca Cappellaro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28076

In this study, the effectiveness of integrating ultrasound with mangosteen fruit peel activated carbon (MFPAC) for the removal of reactive black 5 (RB5) dye was investigated. MFPAC prepared by the potassium carbonate activation method was characterized using BET, SEM and FTIR. The effects of ultrasound power, contact time, pH and adsorbent quantity on the removal of RB5 were examined. Obtained results indicate that the MFPAC has a higher removal efficiency with ultrasound integration and can re...
Autori: Randeep Singh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28093

Deforestation and changes in forest cover are subject to the effects of many factors: economic, social, cultural, political, and environmental and their interactions. To assess these factors, one should necessarily know their nature and then model them. Nowadays many models have been introduced to explore deforestation, however most of them are based on past events and do not pay enough attention to socioeconomic factors. Moreover, considering the future is sometimes absent in those models. The ...
Autori: Maryam Jadidi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28112

China’s tremendous economic developments are achieved at the expense of environmental deterioration. In recent years, PM2.5 pollution has become increasingly serious in China, attracting widespread attention from the citizens and the government. This study aims to investigate the temporal–spatial characteristics of PM2.5 in China in 1998–2012, fully considering the potential influencing factors of PM2.5. The satellite remote sensing data compensate for the deficiency of surface...
Autori: Wenyang Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28115

In this study we present time-related 3D ERI models for a site that was contaminated using waste automobile engine oil. The pristine geo-electrical characteristics of the site were recorded before the contamination was carried out. The purpose of the study was to progressively monitor the geo-electrical responses of the site for possible natural bio-transformations on the waste oil. Data were acquired once every two weeks for a period of three months using eight parallel 2D resistivity profiles....
Autori: Bokani Nthaba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28118

To produce drinking water, the water treatment plants generate huge quantities of sludge, this sludge is a waste and they are evacuated to the dump. The valuation of these sludge will be benific This study focuses on the development of composite alginates beads and sludge activated chemically by sulphuric acid and thermally for the removal of dyes from aqueous solutions. Two dyes were studied; a basic cationic dye (methylene blue) and an acidic anionic dye (Congo red) to compare the adsorption m...
Autori: Hasna Elmontassir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28125

The mesoporous MCM-48 was synthesized at room temperature with different templates such as hexadecytrimethylammonium bromide (C16TABr), hexadecytrimethylammonium chloride (C16TACl) and dodecyltrimethlammonium chloride (C12TACl). The obtained materials were characterized by XRD, N2 adsorption/desorption, FTIR and SEM techniques, and their performance as uranium adsorbent were investigated. In this framework, the effect of contact time, pH of solution, initial uranium concentration and temperat...
Autori: Meriem Chabane Sari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28131

There are considerable environmental and health and safety concerns regarding liquid crystal display (LCD) waste glass because of the waste electrical and electronic equipment (e-waste) that is deposited in landfills. In current study, the effect of variation in LCD waste glass on the deconvoluted fractions of silicon centers of metakaolin geopolymers has been comprehensively investigated to discover the underlying mechanisms governing the performance. Solid/liquid ratio affects the kinetics of ...
Autori: Kang-Wei Lo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28146

The main goal of this work was to develop a cheap and easy method for the synthesis of the porous metallosilicate macrospheres. Zirconium silicate macrospheres with diameters in the range 1.5 – 1.6 mm were obtained by the spray gelling technique, using the multi templating method. Tetraethyl orthosilicate was used as silica source. The chitosan played a dual role (pore and shape generating agent), while other inexpensive and easily accessible biomaterials including yeast, sugar and gelatin...
Autori: Emil Ioan Mureșan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28148

As CO2 concentration levels in the atmosphere are steadily reaching a point of no return, it is paramount that actions are taken towards mitigating emissions by improving the efficiency of existing processes. Sorption-enhanced water-gas shift (SEWGS) combines the water-gas shift reaction with in-situ adsorption of CO2 on potassium-promoted hydrotalcite (K-HTC). This enables a direct conversion of syngas into separate hot streams of H2 at feed pressure and CO2 at regeneration pressure, making th...
Autori: Vlad-Cristian Sandu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28149

Soluble dyes are intensively used in various industrial activities. They represent an important class of water pollutants from which they are rather difficult to remove. This paper focusses on the elimination of Congo Red (CR) ionic azo dye by adsorption on a low cost material. Cherry stones were used for activated carbon preparation by carbonization method. A temperature of 600 °C and a time of 4 h were found as adequate parameters for the physical activation and led to a final white powder...
Autori: Cristina-Gabriela Grigoraș
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28153

The Cellets product represents a cellulose material, which combines different properties such as the perfect sphericity, fine particle size distribution, low friability and solubility, and inertness. The experiments were carried out with Cellets 200 granulated celluloses used as a filling material for a laboratory glass column, using diluted dye solution (9-10 mg of dye /L of solution) at adequate initial pH (4.7). The effect of flow rate was investigated, and the modeling of experimental data f...
Autori: Iulia Nica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28155

In this work, the removal of methyl orange (MO) and Cd2+ by simultaneous adsorption on adsorbent obtained from modified charcoal (BCBH) coated with TiO2 has been studied. The synthesized materials obtained from wood branches were characterized using atomic force microscopy (AFM) for the roughness and SEM to determine the morphology of the surface. EDX spectroscopy indicates the presence of C, N, O, Na, K, P and Ti on the surface of the adsorbent materials. The micro-porosity and BET specific sur...
Autori: Nicoleta Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28157

The contamination of aquatic and terrestrial environments by pesticides is highlighted by their possible toxic properties and poor biodegradability on the environment. The development of low cost by products from agricultural sectors as a suitable solution for contaminated areas remediation is of great environmental interest. Straw wastes can be considered as a promising alternative to remove different chemical compound that are environmentally toxic. In this study, some materials derived from ...
Autori: Irina Gabriela Cara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28161

The pyrolysis of frying palm oil was studied in continuous stationary process, in a micropilot plant. The main factors affecting the products yields are temperature and residence time. For the studied parameters range (temperature: 475oC - 630oC and residence time: 120 s- 240 s), the gas yield varied between 7.9% (w/w) and 63.3% (w/w), related to feed. Unsaturated hydrocarbon yields (olefins) can reach 24-29% (w/w) related to feed, at the right processing parameters, the main products having goo...
Autori: Ana Maria Sivriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28162

The goal of this paper is to contribute to environmental improvement. This goal has been achieved by the development of an algorithm that allows the optimization of fuel consumption and transport of combustion products. The paper considers the outlier – robust recursive algorithm. This algorithm is used for identification of multivariable ARMAX (Autoregressive Moving Average with Exogenous Variables) models. In this paper, we introduce pseudo-Huber loss function which is a continuous nonli...
Autori: Vojislav Filipovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28167

The valorization of a metallurgical waste (i.e., an iron-rich slag) as raw material for the fabrication of high hardness glass-ceramics using differential thermal analysis, X-ray diffraction, X-ray fluorescence and scanning electron microscopy was investigated. The melting of the slag was aided by the addition of waste glass cullet (WGC) and the vitrification field of this system was investigated. The non-isothermal crystallization kinetics of the parent glass with the highest slag content was s...
Autori: Erika Iveth Cedillo-GonzĂĄlez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28168

The study attempted to identify the best suited models to determine the kinetics of chlorine decay and trihalomethanes (THMs) formation in drinking water supplies. Batch experiments were conducted on synthetic water samples to simulate the characteristics of raw water collected from Maithon water treatment plant (MWTP), Dhanbad, Jharkhand, India. Influence of various parameters like total organic carbon (TOC), reaction time, pH and chlorine dose on the rate of THMs formation were analysed. The s...
Autori: Minashree Kumari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28171

The objective of the present work was to introduce a novel adsorbent with high adsorption potential toward methylene blue by decorating montmorillonite clay (MMT clay) with Zn(OH)2–nanoparticles (Zn(OH)2–NPs). The adsorbent was characterized structurally by FE-SEM and FTIR techniques. Central composite design–response surface methodology was applied to optimize experimental variables including adsorbent dosage, pH, initial MB concentration, NaCl concentration, and sonication ti...
Autori: Adel Valipour
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28173

Adsorption of diazinon from aqueous solution was studied by using cross-linked Chitosan/Carbon Nanotube (CHN-CNT) in a fixed-bed column. The cross linked CHN-CNT with 2.5% of MWCNT was prepared with a protected crosslinking method. The effects of the initial concentration of diazinon, bed-height, and flow rate on the adsorption of diazinon onto the cross linked CHN-CNT were investigated. The highest bed capacity of 29.47 mg/g was obtained at the initial concentration of 50 mg/L, flow rate of 10....
Autori: Tahere Taghizade Firozjaee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28174

In cold, high-latitude regions, snow evaporation can significantly influence the snow water equivalent and thus change the regional water balance in early spring. In order to explore how the snowfall event and environmental factors affected the snow evaporation rate in the northern Daxing'an Mountains in China. From the snow melting period of March 2016 to April 2018, the eddy covariance method was used to explore the relationship between environmental factors and snow evaporation. The resul...
Autori: Youwei Lin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28181

The textile industry has been contributing to the generation of wastewater containing dyes during the dyeing process. In this sector, Reactive Blue BB is a dye used on a large scale. One method widely applied to dyes wastewater treatment is adsorption. This technique is inexpensive since it can apply industrial by-products as adsorbents. In this work, the adsorption of Reactive Blue BB dye by the sugarcane bagasse, a by-product from the sugar and alcohol industry, was evaluated in batch syste...
Autori: Handria Hariane Piffer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28226

The paper brings a methodological contribution useful for supporting the development of predictive models of phenomena and human behaviours in the area of environmental protection with respect for history, geo-location, environment boundaries and considering further applications in defining corresponding stimulating policies by decision makers and management teams. It proposes a handy and easy-to-use technique of deriving spatial variables (e.g. aerial distances to a custom border and belonging...
Autori: Daniel Homocianu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28244

Advanced oxidation processes (AOPs) are used with high efficiency in wastewater treatment due to the formation of hydroxyl radicals with high oxidation capacity. However, there exists many different variables which affect the efficiency of theses processes as it affects the amount of hydroxyl radicals formed; such as reaction time, pH, temperature, reactant concentrations and catalyst amount. In this study, the removal of 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP), which are highly t...
Autori: Aysun Altikat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28251