AbstractAromatic volatile organic compounds (VOCs) proved to have enhanced polluting behavior upon the atmosphere and human health. Their catalytic destruction is an alternative for environmental pollution reduction in the case of gaseous emissions with low contents of VOC.In this paper, an experimental study is presented, concerning the conversion of benzene and its mono-halogenated derivatives on SCR-DeNOx (V2O5-WO3/TiO2) commercial catalyst, specific for the reduction process of nitrogen oxid...
Autori: Florin Bandrabur, Heinz Koser, Ion Balasanian, Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25105

<!--[if !supportEmptyParas]--> The photocatalytic degradation of Alcian Blue 8 GX, a copper phthalocyanine cationic dye, has been investigated in aqueous solutions both in heterogeneous and homogeneous systems. Initial colour removal rates in different conditions were calculated in both cases. Influence of amounts of H2O2 and FeCl3 was studied and compared for the two photocatalytic systems. Finally, some conclusions regarding the efficiency of the two photocatalytic processes were es...
Autori: Anca Florentina Caliman, Chrysanthi Berberidou, , Liliana Lazar, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25114

The use of gasoline oxygenated with MTBE (methyl tert-butyl ether) reduced significantly air pollution (16 - 23% lower emissions of CO and 18% lower emissions of unburned hydrocarbons) but increased water pollution. There is no European or national regulations for MTBE in drinking water except for Denmark, which has set a limit value of 30 Âľg/ L for MTBE. USEPA proposed a maximum concentration of 20- 40 Âľg/L. This paper is a review with 70 references on the MTBE production, use, properties and...
Autori: Camelia Beţianu, Florina Ungureanu, Loredana Branza, Lucian Vasile Pavel, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25122

In recent years the removal of toxic substances especially heavy metals from water and wastewater by using of non-conventional low-cost sorbent (industrial wastes and some natural material including microorganisms, plant-derived materials, agricultural products and by-products, mineral oxides, clays) has received much attention. In this paper efficiency of Zn (II) removal from aqueous solutions by sorption onto Romanian sphagnum peat moss was studied in batch experiments involving process parame...
Autori: Angelica Kicsi, , Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25126

AbstractThe textile industry is a large water consumer. Stringent regulations of wastewater characteristics require the use of membrane processes for the removal of persistent organic pollutants (POPs) from textile wastewater prior to discharge or recycling of these effluents.This paper presents an overview of research related to the removal of persistent organic pollutants from textile industry by membrane processes, discussing also the correlations with actual pre-treatment and removal rates. ...
Autori: , Corina - Petronela Musteret
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25127

AbstractThe paper describes the synthesis and characterization of layered double hydroxides (LDH) intercalated with 4,6-dinitro-o-cresol(DNOC) and 2,6-dichlorobenzonitrile (2,6DBN) by anionic exchange method. The incorporation of the organic pesticides in the structure of layered double hydroxides can offer premises to increase the pesticide active life by reducing its volatilization, controlling the release of the pesticide from the layered structure and decreasing the pesticide adsorption in s...
Autori: Gabriela Lisa, Marcel Ionel Popa, Mihaela Frunza
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25144

This study presents an evaluation of the catalytic performances of Fe containing clay-based catalysts for the wet hydrogen peroxide catalytic oxidation (WHPCO) of 4-chlorophenol (4-CP) aqueous wastes. The catalysts were prepared by well-established techniques, their properties being determined by DRX, BET and chemical analysis techniques. All the tests were performed on a laboratory scale set-up. The ion-exchanged clays were the most active catalysts (100 % 4-CP and 84 % COD removal for Fe-Mt) b...
Autori: , Cezar Catrinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25157

AbstractThe mechanisms in the shaping of organic food in Denmark since the 1970'ies are analysed as a contribution to the discussion of strategies for a more sustainable production and consumption of food. The background is the major  achievements in Denmark within organic food since the 1970'ies, but also the recent years' reduction in the land converted to organic farming. The analyses are based on experiences from projects, analyses and literature and draw on innovation theory and theory...
Autori: Michael Sogaard Jorgensen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25153

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

In recent years, the release of volatile organic compounds (VOCs) has received much attention. Catalytic oxidation of VOCs, found in small concentration in industrial gas emissions constitutes an alternative for environmental pollution reduction.In this paper, a comparative study regarding the non-catalytic and catalytic oxidative destruction of non-halogenated or halogenated C6 hydrocarbons (C6H14, C6H12, C6H6, Cl-C6H5, Br-C6H5), is presented. Catalytic oxidation was studied in the presence of ...
Autori: Florin Bandrabur, Heinz Koser, Ion Balasanian, Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25162

Contain all the articles from this issueICEEM /01 PLENARY CONFERENCETen years of Environmental Engineering and Management education and research at the Technical University of IasiMatei Macoveanu, Carmen Teodosiu ICEEM/01  - Environmental Engineering SectionRemoval of nitrogen oxides from Diesel exhaust: Laboratory studies for development of an SCR-catalyst-system using solid urea as reducing agentWerner Weisweiler High temperature desulphurization of hydrogen sulphide containing ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25167

Contain all the articles from this issue:ICEEM/01 -- Environmental Management Section Corporate environmental competence: A concept for characterising and assessing the environmental practice in companies and product chainsMichael S?¸gaard J?¸rgensen, Marianne Forman Life cycle assessment of some alternatives for the supply of thermal energy in the municipality of Iasi (Romania).Nicolae Peiu Management options for the industrial and municipal wastes in the city of Iasi Carmen Teod...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25169

Contain all the articles from this issueEnvironmental analysis by capillary electrophoresis. Atmospheric samplesCamelia Draghici, Gheorghe Coman, Mihaela Sica,Dana Perniu, Mihaela Badea   The ecological farms - A solution for sustainable agriculture. II. Position and perspectives of the ecofarms in the frame of the productive agricultural system Stela Axinte, Alina Stanciu, Lorica Axinte  The extraction and clean up of organochlorine pesticides and PCB's from water using solid phase ex...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25170

Contain all the articles from this issueEditorialEstablishing effluent discharge limits - have we got it right?Yusuf Chisti Full papersSurvey on the treatment of gaseous streams containing volatile organic compoundsOana Penciu, Maria GavrilescuEU environmental policy for industrial pollution control. IPPC DirectiveElena Bobu Environmental monitoring Antonius A.F. KettrupProcess The sonochemical degradationof cyanide ions using atmospheric oxygen as oxidizing agentIoan Iordache, Mircea Teodor Nec...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25171

Plants as biomarkers, biosensors and biomonitorsModelling of wastewater treatment of a pulp and paper mill for monitoringCatalysts for heterogeneous photocatalysts. Part I. Possibilities to improve photoefficiency through catalysts modificationThe global assessment method of the water qualityAspects regarding the wood certification in RomaniaDecolorizing of pulping effluents by ammonium lignosulphonate oxidationPowder coatings-based organic filmsOn environmental effects of the pulp and paper mil...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25172

Contain all the articles from this issueDestruction of Volatile Organic Compounds by catalytic oxidationAlice Oana Rusu, Emil DumitriuRisk assessment for a shipyard from Romanian Black Sea CoastAnca Florentina Caliman, Ion Balasanian Monitoring the behavior of the restoration interventions of the Probota Monastery’s indoor frescoes under the influence of the environmental factors. II. Modifications of the physical-structural and chemical characteristicsIon Sandu, Adrian Dima, Ioan Gabriel Sand...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25173

Contain all the articles from this issueCatalysis for heterogeneous photocatalysis. Part II. Methods for synthesisAnca Florentina Caliman, Ion BalasanianpH influence on sonochemical degradation of cyanides with H2O2 and O2Ioan Iordache, Mircea Teodor Nechita, Nicolae Aelenei, Gabriela Apostolescu, Ioan Rosca Studies of various wastewater nitrification bioreactor types based on modelling and simulationDiana Lupasteanu, Florina Ungureanu, Maria Gavrilescu Wastewater from winemaking industry: monit...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25175

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Design for sustainability (D4S): towards advanced product conceptsHan Brezet, Sacha SilvesterICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Water and Wastewater Treatment Technologies"Complex approach to the problem of persistent organic pollutants degradation in water environmentVictor Covaliov, Olga Covaliova, Angela Cincilei, Gilles Mailhot, Pasca...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25176

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Green technology foresight of high technology: Hype of potentials - The challenges from nanotechnology, Biotechnology and ICTMichael S?¸gaard J?¸rgensenIntrinsic properties of noble metals in catalytic selective reduction of NO by propene in lean burn conditionsAnne Giroir-Fendler, Helleh Saadallah, Adela HaletaICEEM/02 - ENVIRONMENTAL ENGINEERING ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25178

Contain all the articles from this issueCatalysis for heterogeneous photocatalysis. Part II. Methods for synthesisAnca Florentina Caliman, Ion BalasanianpH influence on sonochemical degradation of cyanides with H2O2 and O2Ioan Iordache, Mircea Teodor Nechita, Nicolae Aelenei,Gabriela Apostolescu, Ioan RoscaStudies of various wastewater nitrification bioreactor types based on modelling and simulationDiana Lupasteanu, Florina Ungureanu, Maria Gavrilescu Wastewater from winemaking industry: monitor...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25179

Contain all the articles from this issueNitrous oxide decomposition over Fe-ZSM-5 catalysts prepared by different methodsMircea Teodor Nechita, Ioan Rosca, Daniel Sutiman, Gabriela Apostolescu, Ioan Iordache Geometrical correlation method for global estimation of the ecosystem stateCamelia Popa, Cornel Cojocaru, Matei MacoveanuImmobilized lipases as biocatalysts for organic synthesis 1. Transesterification of ethyl acetate with alcohols in the presence of free Candida antarctica lipase BBrindusa...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25181

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

Include urmatoarele articole:� Removal of persistent organic pollutants from textile wastewater by membrane processes� Sustainability evaluation of an urban residential settlement� Removal of zinc (II) from aqueous solutions by romanian sphagnum peat moss� Development trends of cold plasma reactors in the global context of carbon emission reduction� Assessing the potential of wind power in Romania within Kyoto targets� Research on the impact induced in the environment by milk process...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25198

Include urmatoarele articole:� Keynote Lectures Energy from municipal solid waste: large-scale incineration or small-scale pyrolysis?� Electrical properties of SnO2-Pt/Al2O3 in reduction atmosphere� Corporate management tools to address sustainability Challenges. A reflection on the progress and difficulties experienced during the last decade� Emerging academic responsibilities and opportunities for promoting regional sustainability� Challenges for integrated water resources management...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25200

? 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

AbstractIn this paper, the application of the heterogeneous photocatalysis in degradation of a cationic copper phtalocyanine dye, used as model of persistent organic compound is investigated by assessing the efficiency of the process. The influence of hydrogen peroxide on the photocatalytic process is studied using two types of commercial catalysts, such as TiO2 Degussa (88% anatase, 20% rutile) and TiONa Millennium (100% anatase). Another electron acceptor, FeCl3 is also used for investigation ...
Autori: Anca Florentina Caliman, , , Ioannis Poulios, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25211

AbstractVolatile organic compounds (VOCs) constitutes an important class of environmental pollutants, which, together with other contaminants as NOx, SOx, CO, NH3, CO2 etc. participate in degradation of atmosphere and exhibit a potential risk for human health. VOC emissions may be generated in more than 25 percentages through the use of solvents in different industrial or house holding activities. For applying a certain plan concerning the pollution reduction, any user of organic solvents contai...
Autori: Florin Bandrabur, Ion Balasanian, Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25218

AbstractAluminum and ferric salts are widely used as coagulants in water and wastewater treatment. They are effective in removing a broad range of impurities from water, including colloidal particles and dissolved organic substances. As well as traditional additives, such as aluminum sulphate ("alum") and ferric chloride, other products containing prehydrolized metal ions such as polyaluminum chlorides are now commonly used. The aim of this study was to develop a model for coagulation/flocculati...
Autori: Avid Banihashemi, Manouchehr Nikazar, , Reza Maknoon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25230

AbstractCadmium is listed by US-EPA as one of priority pollutant and as a known carcinogen, and therefore its removal from wastewaters of various industrial processes is a very important environmental problem. The paper analyzes the effectiveness of a Romanian sphagnum moss peat as available and cheaper sorbent in removal of Cd (II) from aqueous solutions. Batch sorption experiments were carried out in order to establish the influence of solution pH, peat dose, contact time and initial cadmium c...
Autori: Catalin Balan, , Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25231

AbstractThe paper presents new experimental results on the photodegradation of two important phenyl urea herbicides in water: Monuron and Isoproturon. The photodegradation was performed by two Advanced Oxidation Processes (AOPs): the homogeneous photo- Fenton process (, UV-H2O2 - Fe3+) and a heterogeneous photo - Fenton reaction using an iron pillared Laponide- RD catalyst (Fe-Lap-RD). The Fe-Lap-RD catalyst was prepared from iron nitrate 0.2 M solution and a suspension of Laponite - RD clay. Th...
Autori: Elsa Lundanes, Ilie Siminiceanu, Maria-Magdalena Bobu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25234

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

AbstractThe behaviour of three types of steel, with a variable carbon concentration (from 0.20 to 0.40 %) is studied in medium of ethylene glycol - 10 % methanol - 5 % succinic or adipic acid with water concentration varying between 1 % to 5 %. IR spectroscopy, Xray diffraction and chemical analysis were the methods used for corrosion compounds analysis. The weight losses were measured; also the polarization curves were plotted and the corrosion parameters were established. Based on the obtained...
Autori: Daniel Mareci, Daniel Sutiman, Ioan Iordache, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25240

AbstractThis paper presents an overview of research related to use of surfactant modified natural zeolites (SMZ) in water and wastewater treatment. The most common natural zeolite, widely used as starting material is clinoptilolite, but other natural zeolites have also been used (chabasite, heulandite, mordenite). In the first part, the preparation methods and the influence of process parameters on the final product properties is reviewed. The discussion is focused on the influence of surfactant...
Autori: , Cezar Catrinescu, Roxana Elena Apreutesei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25241

AbstractHollow fiber polyacrylonitrile membranes with three different MWCOs (i.e. 6, 13, 50 kDa) have been tested for dead-end ultrafiltration of a combined refinery and petrochemical secondary effluent. The effluent treatment envisaged further recycling as cooling water make-up following an ultrafiltration/reverse osmosis advanced treatment scheme. Criteria for ultrafiltration evaluation included flux restoration by backwashing, turbidity removal efficiency and water recovery. The membranes cou...
Autori: , Lidy E. Fratila-Apachitei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25258

AbstractIn this study, we follow the chrome distribution and his association forms with mineral and organic components, from 14 soilsamples from industrial zone of IaÂ?i city.The total chrome concentration in studied soil samples varied between 11.73-129.35 μg/g, being lower than the normal values only for four samples. The Cr(VI) weight of total chrome content varied between 3.78-14.52 %. For none of studied soil samples the chrome content is not over to value of alert concentration. The q...
Autori: Constantin Rusu, Doru Juravle, Dumitru Bulgariu, Laura Bulgariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25260

AbstractAdvanced closing of paper machine circuits results in the accumulation of the dissolved and colloidal substances (DCS) in the process water. At a critical concentration, the DCS are destabilizing even by small variations in paper machine parameters, producing operational and product quality problems. This article presents results of lab experiments simulating the process water recycling in short circuit of paper machine, without and with addition of fixing agents. Tests were performing w...
Autori: Dan Belosinschi, Elena Bobu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25261

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

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

AbstractIn this work it had been tested the recovery of some compounds like: Fe2O3, TiO2, PO4 3- ions, Al2O3 from the sludges, which result in the industrial facilities for output of pure uranium dioxide. Solubilization of the chemical compounds from the uraniumwastes was performed in strong acidic media, using adequate methods....
Autori: Alexandru Cecal, Doina Humelnicu, Romeo Iulian Olariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25288

? 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

AbstractThe possibility of biological phosphorus removal (BPR) was studied using a lab-scale single reactor the same as SHARON process. Up to now, there has been no investigation of the feasibility of SHARON process for the purpose of phosphate removal. The optimal operation conditions were established to obtain highest removal rates. Under the experimental conditions, the phosphorus concentration dropped from an influent concentration of 1000 mg/L to levels around 0.1 mg/L or less. It was concl...
Autori: Abbas Rezaee, Hatam Godini, Masod Solimani, Nayera Nami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25293

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 development of technologies for waste treatment, simultaneously with minimizing greenhouse gas emissions, has become a matter of great concern at global level. Biogas systems can help in the fight against global warming by avoiding to escape methane from organic waste, into the atmosphere. Biogas technology is of great benefit to the end-users and the environment by energy, compost and nutrient recovery. Romania is a country with a huge biomass potential. Implementing of biogas techn...
Autori: , Corina Alice Babutanu, Gheorghe Băran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25300

AbstractThis paper discusses the results of study concerning the interaction between the birch veneer and some compounds with biocide potential action are presented. With this end in view the samples of veneer were immersed in solutions with a concentration of 5% of the following products: unmodified straw lignin or modified through hydroxymethylation, furan resin and tannins dissolved in 0.1 N ammonia solution. To make a comparison, the same combined treatments were applied, using ammonia solut...
Autori: Adina-Mirela Capraru, Elena Ungureanu, Valentin I. Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25309

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

AbstractGroundwater is an important source of drinking water, especially for rural population. In the last years, bacteria, nitrate, organic chemicals and other pollutants existing in groundwater have increased public concern about the quality of groundwater. Groundwater provides about 22% of all freshwater withdrawals; 37% of agricultural use (mostly for irrigation); 37% of the public water supply withdrawals; 51% of all drinking water for the total population and 99% of drinking water for the ...
Autori: Ancuţa Rotaru, Paulica Raileanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25329

AbstractIn this paper the results of surface water treatment process for drinking purpose are presented, using the microfiltrationultrafiltration process. The experimental studies were carried out using a microfiltration-ultrafiltration pilot plant and raw water from Bega River, Timisoara as feed. To assess process performance, the water quality, e.g., turbidity, total coliforms and hardness parameters were determined for two different operating regimes subjected to filtration time. A good effic...
Autori: Camelia Podaru, Cristian Danielescu, Florica Manea, Georgeta Burtica, Ilie Vlaicu, Viorel Patroescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25332

AbstractObservations and data regarding the intense corrosion and deposit phenomena of the carbon steel tube bundle of the heat exchanger are presented. The bundle ensures the cooling of the light fraction C1 - C5 from the top of the distillation column which carries out the removal of pentane and smaller derivates into the RC equipment. Chemical and mineralogical analyses confirm the aggressive action of the fluids flowing through the exchanger. Tests have been done in order to replace the carb...
Autori: Ana-Daniela Georgescu, Lucian Georgescu, Maria Apostolescu, Nicolae Apostolescu, Ovidiu Georgescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25333

AbstractThe removal of Acid Red 398 (AR398) dye from dye-containing solution using coagulation/flocculation process with polyaluminum chloride (PAC) and Alum was investigated. The effect of different parameters involving pH, dosage of coagulant, initial dye concentration, and bentonite as a natural coagulant aid was examined. According to the obtained results, the optimum pH, at which the maximum removal occurred, was about 4 and 5 for PAC and Alum, respectively. However, PAC performed efficient...
Autori: Maryam Hasani Zonoozi, , Mokhtar Arami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25335

AbstractNatural hemp fibers have been evaluated for Zn (II) ions sorption from diluted aqueous solutions. In order to establish the optimum conditions, the effect of initial pH of solution, hemp dose, Zn (II) concentration, temperature and contact time of phases on the Zn (II) sorption by natural hemp has been studied. To model the Zn (II) sorption at three different temperatures the Langmuir and Freundlich isotherms have been used. The Langmuir maximum sorption capacities were determined as bei...
Autori: Carmen Paduraru, Lavinia Tofan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25336

A study was conducted to investigate the organic compounds residues in different types of coffee from market inThe detection limits ranged from 0.02 ng/kg to 0.04 ng/kg and quantification limits were 0.2 ng/kg. Calibration and recovery studies gave satisfactory results. Concentrations of OCPs in coffee samples varied from 0.001 mg/Kg to 0.007 mg/Kg. The methods provide a rapid and accurate determination of these organic compounds in coffee samples....
Autori: Gabriela Stanciu, Mariana Popescu, , Simona Dobrinas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25338

Include urmatoarele articole:� Composite membranes with cross-linked matrimid selective layer for gas separation� Determination of organic compounds from different types of coffee by Hplc and Gc-Ecd analysis� An integrated assessment of the suitability of domestic solar still as a viable safe water technology for India� Investigations on the possibility of natural hemp fibers use for Zn(II) ions removal from wastewaters� Removal of acid red 398 dye from aqueous solutions by coagulation...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25340

Abstract        The sorption of metal ions from aqueous solution plays an important role in water pollution control and in recent years there has been considerable interest in the use of low-cost adsorbents. Many researchers have tried to exploit naturally occurring materials as low-cost adsorbents, for removing of heavy metals. In this article the removal performance of various low-cost adsorbents derived from agricultural waste or natural material is evaluate...
Autori: Raluca Maria Hlihor, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25379

AbstractThe technological process of basic chemical organic compounds synthesis is included among the economic activities that can affect the environment quality. The environmental impact of chemical organic synthesis is evaluated using the alternative method of global pollution index that considers the concentric circles graphical methodology proposing a scale of the arithmetic mean values for the evaluation scores of each environmental components (e.g. water resources, gaseous emission, soil a...
Autori: Carmen Zaharia, Ilie Murăraşu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25352

AbstractAn experimental three-stage subsurface flow constructed wetland system was investigated for the removal of nutrient and organic matter from primary-treated domestic wastewater. Built in the Turkey Scientific and Technical Research Council-Marmara Research Center, Gebze, Turkey (Istanbul), the system consisted of a vertical flow-gravel filtration in the first stage, a horizontalsubsurface flow bed vegetated with Iris in the second stage, and a vertical-subsurface flow bed vegetated Phragm...
Autori: Bilal Tuncsiper
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25358

Include urmatoarele articole:� CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cells� Trend in exhaust emissions from in-use gasoline vehicles� Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths� Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solution� Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cells� Hydrodynamic modelling of pollution with LNAPL gene...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25367

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

â€? Bioremediation of contaminated air using a bioscrubberâ€? Quality risk evaluation of the groundwater resources on the moldavian areaâ€? Electrochemical characterization of some dental materials in accelerated environmental testingâ€? Preliminary study of simple and Fenton oxidation with hydrogen peroxide applied on final effluents from a zootechnical farmâ€? The environmental impact assessment caused by the dykes failureâ€? Revaluation of beer industry byproducts – medical implicationsâ€? ...
Autori: http://www.ecozone.ro/reviste.php?RID=25372

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25373

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25374

� 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 use of adhesives for floor covering have been deeply modified for longtime, by formulations of polymer-based products in aqueous dispersion as an alternative to organic solvents. These advances envisaged ways for obtaining nonpolluting products. Developing these adhesives required the parallel development of methods for monitoring and analyzing the emissions over time. This paper shows the results of some research devoted to identify the indoor presence of volatile organic compounds ...
Autori: Irina Ioniţă, Domnica Ciobanu, Monica Tulbure, Iulian Tanţoş
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25388

AbstractUltrafiltration (UF) represents an important option for the advanced wastewater treatment as it offers good performances from both technical and economical points of view, for the removal of suspended solids, colloids and some of the organic compounds present in different effluents. The occurrence of priority organic pollutants in wastewaters streams and the environment has raised intensive scientific debates about their effects and the possible abatement technologies. As part of a broad...
Autori: George Barjoveanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25390

AbstractPersistent organic pollutants (POPs) are toxic chemicals that adversely affect human health and the environment around. This group of priority pollutants consists of pesticides, industrial chemicals and unintentional by-products of industrial processes. Natural materials, waste from industry and agriculture and bioadsorbents can be employed as inexpensive adsorbents to remove POPs from environmental components by sorption processes. The paper presents various natural sorbents and some ou...
Autori: Laura Carmen Apostol, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25395

Abstract The efficiency of Cd (II) removal from aqueous solutions was investigated using Sphagnum moss peat as sorbent. A 23 orthogonal central composite design was successfully employed for experimental design and analysis of results. The combined effect of the initial solution pH, peat dosage and initial Cd (II) concentration was studied and optimized using Response Surface Methodology (RSM). The optimum values of these variables were found to be pH = 4.72, 14.7 g peat /L and 13.64 mg Cd /L, ...
Autori: Catalin Balan, Corneliu Cojocaru, Petru Bulai, Doina Bilba, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25399

Abstract This paper presents the preliminary results of photocatalytic oxidation of humic acid from water using two types of catalysts, i.e., TiO2 and Ag-doped TiO2 modified zeolite (TMZ and Ag-TMZ). TMZ and Ag-TMZ, with zeolite granulation of 315-500 ?Źm was synthesized by sol-gel method, and the morphology and composition of the unmodified/modified zeolite were characterized by BET (Brunauer–Emmet–Teller) method, X-ray Diffraction (XRD), scanning electron microscopy (SEM) and energy dis...
Autori: Cornelia Ratiu, Carmen Lazau, Paula Sfirloaga, Corina Orha, Daniela Sonea, Stefan Novaconi, Florica Manea, Georgeta Burtica, Ioan Grozescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25397

Abstract This work examines the influence of experimental conditions on the copper (II) ions removal from aqueous solutions using chelating ion exchange resin Purolite S930. The influence of solution pH, initial metal concentration, contact time, temperature, ionic form of the resin and resin dose was studied in batch experiments. The percent of Cu (II) removal has a maximum at pH 5.0 (buffered solutions), and increases with the increasing of resin dose, of the contact time and of temperature...
Autori: Petru Bulai, Catalin Balan, Doina Bilba, Matei Macoveanu
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25401

Abstract The potential of using ultrasonic irradiation and microbiological treatment for the removal bis(1-chloro-2-propyl) ether from aqueous solutions has been investigated. Experiments were performed in a continuous bioreactor, 3500 mL volume, and in an ultrasonic bath respectively, using frequencies of 38+1kHz and applying a power of 30 W. Under these conditions, the sonochemical conversion of ether was found to be superior to the biological one. The ultrasound method was improved by air ...
Autori: Mihaela Iordache, Vasile Lucian Pavel, Lim Myunghee, Ioan Iordache
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25403

Abstract This paper presents a comparative study of natural and mechanically mixed composting processes of marc resulting as a byproduct during the production of alcohol obtained from fermented fruits. Moisture, temperature, pH values, soluble fraction, total organic carbon, Kjeldahl nitrogen and ash content were monitored for 60 days. During this period the atmospheric temperature varied from 18Â?C to 21Â?C. The composting process could be considered a combination of three stages: mesophilic...
Autori: Anca-Ileana Penu, Daniela Simina Stefan, Mircea Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25407

Abstract Phytoremediation is an eco-friendly, cost effective, in situ treatment technology. In the present research study, phytoremediation technology has been employed for remediation of radionuclides namely 137Cs and 90Sr by using living green plant Catharanthus roseus. C. roseus plants were exposed to different activity levels of 137Cs and 90Sr in aquatic condition to assess the efficiency of plants for remediation of radionuclides. C. roseus plants have been found to remediate 70%, 52% an...
Autori: Singh Anamika, Susan Eapen, Madhusudan H. Fulekar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25417

Abstract Textile industry is one of the most pollutant and water consuming industries. Large quantities of water are required in materials preparation and dyeing, so consumption and waste generation have become serious concerns for textile manufacturers and finishers. Textile effluents are characterized by high values of quality indicators such as BOD and COD, suspended solids and heavy metals. A serious environmental problem and also an aesthetic problem is the color of the effluent. Reactiv...
Autori: Daniela Cailean, George Barjoveanu, Corina - Petronela Musteret, Liliana Rozemarie Manea, Nicolae Sulitanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25420

Abstract The analysis over the underground water monitoring system and the collected data from survey drilling show that the underground water has an unsatisfactory quality due to some physical and chemical characteristics. Along with these, factors like the surface water pollution, the hydrodynamic exchange between surface and underground waters and the reintroduction in the agricultural activities of nitrates and phosphorus based fertilizers lowers, as well, the quality that it has been tal...
Autori: Ioan Crăciun, Catrinel-Raluca Giurma-Handley, Ion Giurma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25436

Abstract This study examined the effect of hexane concentration in the inlet gas stream on the treatment performance of a concentric tube internal loop airlift bioreactor with a 7 L capacity, inoculated with a strain of Pseudomonas aeruginosa. The experiments were conducted employing hexane-contaminated air, in 0.62, 1.26, 2.15 and 4.5 g/m3 concentrations at 29 ¹ 1°C. The 100% hydrocarbon removal was verified when effluents containing 0.62 and 1.26 g/m3 of hexane were employed. Under contin...
Autori: Fernando Jorge Santos Oliveira, Leonardo Vazquez, Francisca Pessoa de Franca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25437

Abstract The synergistic combination of polymers and inorganic compounds via sol-gel process has attracted great attention, by manipulating structure at molecular level, for developing new materials with desired properties. These new hybrid materials could have a controllable combination of the benefits of polymers (flexibility, toughness, ease of processing) and those of ceramics or glasses (hardness, durability, thermal stability). The microstructures and the properties of hybrid materials...
Autori: Lucia Dumitrescu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25446

Abstract At present, dangerous industrial wastes are a main source of environmental pollution because they are stored and deposited improperly. Besides, dangerous industrial wastes could also be a source of secondary raw materials which are not well capitalized. This fact causes substantial losses of secondary raw materials and energy and it is explained by the lack of certain technologies of treatment, capitalization and final removal that are technically and economically sustainable. To ide...
Autori: Neculai Mihailescu, Vasilica Daescu, Elena Holban, Mariana Nicoleta Badea, Jenica Paceagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25447

Abstract Spent hydroprocessing catalysts from petroleum refining industries have been classified as hazardous wastes due to their content in heavy metal and persistent organic pollutants (POPs). The aim of our paper determine the polycyclic aromatic hydrocarbons (PAHs) residues contents in spent catalysts samples from four different units of the Romanian refinery Rompetrol Rafinare,Constanta: Hydrogen (H), Gas Desulfurization Sulfur Recovery (GDSR), Hydrofining Turbojet Kerosene (HTK) and Pet...
Autori: Camelia Draghici, , , Gabriela Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25449

Abstract The waste recycling done in order to obtain composite products with performant properties and also, with long life cycle is the main purpose for the sustainable development. The present paper describes the way in which, different kind of solid wastes are immobilised in an organic resin as a binder matrix. Composites with different proportion of waste as, rubber/plastic, glass and silica sand have been obtained. The physical-mechanical properties and chemical stability of such organic...
Autori: Ioan Ropota, Emilia Zamfirache, Marcela Muntean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25450

Abstract It's well known the degradation of many Romanian (including Dobrogea) soils, both in hill and in plain environments, due to the increasing anthropic pressure on natural resources. Soil erosion and organic matter loss are recognized as the main processes responsible of such degradation and of the rising risk of desertification, to which land use changes and politics for agriculture not suitable for land specificities often contribute. The knowledge of land use impact on soil quality i...
Autori: Marioara Nicolaescu, Naliana Lupascu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25453

Abstract Arsenic (As)-contaminated drinking water is a major problem around the world. The removal efficiency depends strongly on the size of Fe3O4 sorbents.Fe3O4 prepared in laboratory is more efficient in the removal of As and is also more easily recovered from column of magnetic separator than the commercial materials. This would be beneficial in a water treatment system because the As-contaminated Fe3O4 could be flushed from the column permitting reuse of the separator system. The dispers...
Autori: Ionel Balcu, Adina Segneanu, Marius Mirica, Mirela Iorga, Catalin Badea, Iuliana Firuta Fitigau
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25456

Abstract The paper presents new studies about the removal efficiency of the biochemical treatment process of the Municipal Wastewater Treatment Plant from Constanta city, during 2008. Influent and effluent samples of biochemical treatment stage were collected and ammonium concentration, chemical oxygen demand (CODCr) and biochemical oxygen demand in five days (BOD5) were measured, aiming to study the evolution of the removal efficiency, during 2008. Additional analyses have been performed in ...
Autori: Elisabeta Chirilă, Camelia Draghici, Adriana Puhacel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25458

Abstract The studies of Cu (II) adsorption were conducted by testing various sawdust types. Two biomass, oak sawdust wood (Querqus robur) and white poplar sawdust wood (Populus alba), have been compared considering their efficiency for copper removal from diluted water solutions. Raw sawdust proved no efficiency in adsorption. Therefore, pre-treatment processes were developed and optimized, to enhance the sawdust affinity for heavy metals adsorption. The optimized pre-treatment conditions are...
Autori: Dora Lucaci, Anca Duta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25460

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 paper presents the comparative study regarding the turbidity removal using aluminium sulphate Al2(SO4)3*18H2O and polyaluminum chlorides, Aln(OH)mCl3n-m, commercial name, Sachtoklarr 39, in water treatment plant from Covasna City. The parameters that influence the treatment process and the efficiency of turbidity removal were studied. The water characteristic parameters of Basca Mare and Covasna rivers - the two sources of water alimentation for Covasna water treatment plant were...
Autori: Daniela Simina Stefan, Cristina Costache, Viorica Ruxandu, Monica Balas, Mircea Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25462

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 The aim of this present paper is investigation of the reactions of preparation of unsymmetrical reactive carbonates from the corresponding symmetrical carbonates and different type of alcohols. The asymmetrical carbonates represent alternative reagents (mild, efficient) for alkoxycarbonylation of amines and amino-acids. The synthesized compounds were characterized by spectroscopic and chromatographic methods. A general method for preparation of asymmetrical carbonates was develop fro...
Autori: Adina-Elena Segneanu, Ionel Balcu, Marius Constantin Mirica, Mirela Ioana Iorga, Marius Milea, Zoltan Urmosi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25472

Abstract A crucial stage which makes the other directions of development of membrane processes is getting new membrane materials, to meet increasingly stringent of selectivity and productivity. Polyetheretherketone shows high stability against chemical and physical agents but is poorly soluble in most common solvents. Present studies on obtaining the support of the polyetheretherketone membranes were limited by: solubility of polyetheretherketone in concentrated sulfuric acid and fast speed a...
Autori: Mihaela Emanuela Craciun, Aurelia Cristina Nechifor, Florin Aldea, Gheorghe Nechifor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25475

Abstract Nanotechnologies may have properties of self-assembly, stability, specificity, drug encapsulation and biocompatibility as a result of their material composition. Nano-particles are being actively developed for tumour imaging in vivo, bio-molecular profiling of cancer biomarkers, and targeted drug delivery. These particles are stable, environmentally benign, and their chemical properties can be easily tailored by chemically modifying their surfaces. Conjugated with pharmacological a...
Autori: Simona-Florentina Pop, ,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25484

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 The cleanup of environmental pollution involves a variety of techniques, ranging from simple biological processes to advanced engineering technologies. Cleanup activities may also address a wide range of contaminants. Technologies to remediate contaminated soil fall into two principal clean-up approaches: in-situ (which is always done onsite), or ex-situ (which can be done on- or off-site). In-situ treatment deals with contamination without removing material from the ground, while ex...
Autori: Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25501

Abstract This paper presents preliminary results of a batch-scale study assessing the contribution of the multiple phenomena involved in siloxane removal in three-phase biomatrices. Batch scale experiments were undertaken in shaken flasks containing acclimatised culture medium, solid media and siloxane vapours (octamethylcylotetrasiloxane and decamethylcyclopentasiloxane, respectively) under anaerobic gas-phase conditions. Abiotic and biotic phenomena, considered to be possible siloxane remov...
Autori: Gabriela Soreanu, Patricia Falletta, Michel Beland, Kara Edmonson, Peter Seto
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25510

Abstract The individual physical, chemical, and biological interactions that determine the exposure of plants and animals to chemicals associated with soils are of great importance in the assessment of contaminants bioavailability. Understanding of bioavailability processes is at last needed to improve the scientific basis of risk assessment and is the purpose of the present research. Since bioavailability processes are embedded within existing human health and ecological risk frameworks, so...
Autori: Brindusa Mihaela Robu, Camelia Smaranda, Florentina Anca Căliman, Laura Carmen Apostol, Lucian Vasile Pavel, Maria Gavrilescu, Raluca Maria Hlihor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25516

Abstract Waste management hierarchy has as priorities waste recycling and energy recovery. Unfortunately, Romania is in the situation so as the waste landfilling is still considered as a suitable solution for waste management. European Union imposed a number of regulations and programs in the field of waste treatment and management that Romania must comply. The paper describes some aspects regarding characterization of the leachate originating from the Tomesti landfill (situated in Iasi County...
Autori: Ana-Maria Schiopu, Brindusa Mihaela Robu, Ion Apostol, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25523

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 Peat moss has been widely used as low-cost adsorbent to remove a variety of pollutants, including organic compounds and metal ions from aqueous effluents. Various functional groups allow such compounds to bind on active sites of peat moss. The adsorbent used in this study was Romanian peat moss sampled from Poiana Stampei (Romania). The adsorption of Co(II) ions from aqueous solutions on Romanian peat moss was studied in batch experiments, in order to establish the influence of initi...
Autori: Corneliu Caramalau, Laura Bulgariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25533

Abstract The constructed wetlands are considered as a low-cost alternative system for nitrogen removal. Shale was selected as a media in constructed wetlands, on the basis of adsorption capacity and suitability for plant growth. The specific objective of this study was to evaluate nitrogen adsorption capacity for using as a media in constructed wetlands. Shale was sieved into 5 particle sizes Shale A-E. The physical and chemical characteristics of shale showed that it is suitable to be use as...
Autori: Amara Daothaisong, Jareeya Yimrattanabovorn
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25535

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 In the textile finishing and dyeing industries, the total volume of water consumed is around 150 millions tons/year, and thus very large quantities of water are processed and produced as wastewater by textile plants. Quality indicators of textile wastewaters, like BOD and COD, have values which, in some cases, exceed 5 times the maximum concentration value (allowed by the national quality standards). One of the greatest concerns in wastewater treatment of a textile effluent is the co...
Autori: Daniela Cailean, , Florin Brinza
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25538

Abstract This paper is the investigation concerning the removal, from surface water, of humic acids and of some cations (Cu2+, Al3+) on activated carbons AG-3, BAU, CASO-16 from individual solutions as well as from their mixtures both in static and dynamic conditions. The conclusions of the paper are that, when humic acids are adsorbed from micellar solutions, semiassociates are formed on the surface of activated carbon BAU (in its porous structure), while humic acids adsorption on activated ...
Autori: Tudor Lupascu, Mihail Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25539

Abstract The practical capacity of an ion exchange or chelating resin depends on various process variables, such as initial solution pH, initial metal ion concentration, metal/resin ratio, contact time and temperature. This work presents the optimization of process variables to maximize the copper loading capacity of chelating resin Purolite S930. To study the combined effect of the initial solution pH, initial Cu (II) concentration and resin dosage were used a 23 orthogonal central composi...
Autori: Petru Bulai, Catalin Balan, Corneliu Cojocaru, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25563

Abstract Withania frutescens plant from the south-western Morocco was used as an environmentally friendly material for the removal of As(V) ions from aqueous solutions. This work presents the characteristics of the adsorption and the desorption processes of As(V) using the dried W. frutescens plant as an environmentally friendly adsorbent. The mass of the adsorbent, the As(V) concentration, the contact time and the pH of the tested aqueous solutions were used as controlled variable parameters...
Autori: Mohamed Chiban, Gabriela Lehutu, Fouad Sinan, Gabriela Carja
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25568

Abstract A prehydrolyzed aluminium chloride (PAC), commercial product selected from a previously studied series, and the electrochemically obtained PAC (E-PAC) were tested as coagulants, comparatively with the classical aluminium sulfate (alum). A new method for producing E-PAC has been applied. The level of turbidity, the amount of total organic carbon, the UV-254 absorbance and the residual aluminium were evaluated, for determining the efficiency of the coagulation process in all situations...
Autori: Adina Pacala, Ilie Vlaicu, Ciprian Radovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25569

Abstract The textile wastewaters have a diverse composition depending both on the used raw materials and applied manufacturing technologies. These wastewaters may contain various pollutants such as organic compounds (e.g. residual dyes), suspended solids, metal ions etc. Most of dyes are synthetic compounds with aromatic molecular structures and non-biodegradable. The oxidative destruction via homogenous oxidation processes with hydrogen peroxide (simple chemical oxidation with H2O2 or advanc...
Autori: Carmen Zaharia, Daniela Suteu, Augustin Muresan, Rodica Muresan, Alina Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25570

Abstract This work describes the preparation of a hydroxyapatite/polyurethane composite membrane and their characteristics. The porous hydroxyapatite/polyurethane composite membranes were made via solvent casting process. The deposited hydroxyapatite layers were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The data suggest that the method utilized in this work can be applied to obtain deposition of coating of crystalline hydroxyapatite on porous polyurethane...
Autori: Gabriela Ciobanu, Dorina Ignat, Gabriela Carja, Constantin Luca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25572

Abstract Some doses of compost obtained in farms were tested during 2004-2006, comparative to chemical fertilization, at S.C. Soimul S.R.L. from Vacareni Plain, Jijila village, Tulcea district. It was found out that fertilization with 30 t/ha of compost had established the highest production of wheat Dropia variety, 6512 kg/ha, with 40.7% higher than unfertilized variant and 16.8% higher than N160P80K80 fertilized variant. The highest protein content of 15.21% has been obtained in the case o...
Autori: Mihail Axinte, Teodor Robu, Marius Zaharia, Costel Moglan, Carmen Ghitau
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25575

Abstract Organic matter is ubiquitous in every type of aquatic system and due to the influence that it has on their ecological health, can be used as a useful water quality indicator. Fluorescence spectroscopy has been efficiently used in the past decades to determine and characterize organic matter, and its link to function and chemical water quality. In this paper, fluorescence fingerprints are presented in order to evidence the anthropogenic influence on different aquatic systems. Using f...
Autori: Elfrida M. Carstea, Luminita Ghervase, Gabriela Pavelescu, Dan Savastru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25576

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 Wastewaters of textile and leather dying industries contain significant quantities of water-soluble dyes. Moreover the temperature and pH of these wastewaters may be controlling variables affecting the biosorption performance. In this study the sorption of dark blue dye by Aspergillus biomass and peat was studied as a function of temperature, initial dye concentration, and initial pH values. In addition, the effects of sorbent dosage on the sorption processes were systematically stud...
Autori: Cornel Cojocaru, Cornel Pohontu, Igor Creţescu, Mariana Diaconu, Roxana Elena Benchea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25587

Abstract The present paper proposes an integrated-treatment process of leachate from a municipal landfill, which involves two treatment steps. The first step consists in diminishing the organic content through an advanced oxidation process using ozone and hydrogen peroxide. The second step is performed in order to diminish the content of heavy metals through a sorption process on a natural low-cost biosorbent, thus the traces of organic substances remained after oxidative degradation or oxida...
Autori: Carmen Paduraru, Corneliu Pohontu, Igor Creţescu, Lavinia Tofan, Marius Sebastian Secula, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25589

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 use of biomaterials as biosorbents for treatment of wastewaters will provide as a potential alternate to the conventional treatment methods. The main advantages of biosorption are high selectivity , cost effectiveness and good removal performance. World wide numerous low cost bio materials have tried for biosorption of dyes. In this present investigation, the dead biomass of Penicillium sp. fungus and wood sawdust was used as biosorbents and their capacity to removed malachite gr...
Autori: Cornel Pohontu, Florin Luca, Igor Creţescu, Manea Liliana, Mariana Diaconu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25593

Abstract This paper presents a portable device for rapid preparation of samples, in situ, in order to facilitate the detection and identification of toxic substances. This product is for research and provides increased sensitivity NBC detection equipment (ion mobility spectrometers, indicated tubes), and decreasing the time needed for preparation solid and liquid samples to identify toxic substances by spectrometric techniques (gas chromatography with mass spectrometry). It is used especially...
Autori: Alexandru Bobes, Aurica Dumitrescu, Doru Alexe, Gabriel Epure, Liliana Rece, Nicoleta Petrea, Petrisor Zamora Iordache, Razvan Petre, Vasile Somoghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25595

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 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 The aim of this study was to assess nitrate removal using impregnated activated carbon (AC) with MgCl2. After impregnating of AC using heat treatment, the MgCl2 is converted to efficient MgO. The denitrification was conducted at pH 6.2, 25?C, and initial concentrations of 20 mg/L nitrate-N. The effects of the operating parameters including AC dosage, pH, and contact time have been investigated. Experimental data show that AC modified by MgCl2 was more effective than virgin AC for nit...
Autori: Abbas Rezaee, Hatam Godini, Sahand Jorfi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25618

Abstract The Schiff base N,N??(salicylidene)-methylenediamine, known as Salmen in combination with Cr(III) forms at pH = 4.5 a greenish precipitate, which is stable at room temperature but decomposed on heating. The study of the Infrared spectra, Electron Spin Resonance (ESR), X-ray diffraction and thermogravimetry has pointed out that the precipitation form is a complex, while the molar ratio showed that the combination rate of Cr(III): N,N?-bis(salicylidene)-methylenediamine is 1:1. The new...
Autori: Doina Sibiescu, Ioan Roşca, Irina Spatarescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25619

Abstract The chlorine is the reagent of the widest application in disinfection processes of drinking water but it shows the short coming of reacting with the organic substances therein giving trihalomethanes with possible cancerous action. For this reason the tendency is noticed of replacing chlorine by reagents with higher disinfecting properties and lack of final toxic products. The chlorine dioxide could be used to this purpose. A comparative study on the effects obtained by treating the P...
Autori: Corneliu Oniscu, Dan George Popovici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25620

Abstract The adsorption behavior of bael tree (BT) leaf powder for cadmium ions from aqueous solutions has been investigated as a function of appropriate equilibrium time, adsorbent dose, adsorbate concentrations and pH using a batch system. Studies showed that the pH of aqueous solutions affected cadmium removal as a result of the fact that removal efficiency increased with increasing solution pH. The maximum adsorption was 93.56% at solution pH equal to 6.0, contact time of 30 min and initi...
Autori: Ponnusamy Senthilkumar, Rangasamy Gayathri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25621

Abstract In this study, the effect of adding granular activated carbon (GAC) to aerobic sequencing batch reactor (SBR) on possibility to treat a wastewater containing a reactive dye (Brill Blue KN-R) was investigated. Experiments were performed in four cylindrical Plexiglas reactors for 68 days (5 days for acclimatization of sludge and 63 days for normal operation in two separate phases). Initial dye concentrations were adjusted to 20, 25, 30 and 40 mg/L in the reactors R1, R2, R3 and R4, res...
Autori: Amir Asadi Vaigan, Hossein Hashemi, Mohammad Reza Alavi Moghaddam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25624

Abstract The aim of this study was to evaluate the capacity of certain bacterial and fungal strains - isolated from the dairy industry wastewater - to biodegrade the organic compounds such as casein, lactose and lactic acid similarly to those which determine the organic pollution. The strains able to rapidly biodegrade organic compounds were identified and screened for the inoculum preparation which is afterward tested for the aerobic biological treatment of the simulated dairy-processing was...
Autori: Gabriela Bahrim, George Ifrim, Marian Barbu, Mihaela Palela, Sergiu Caraman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25625

Abstract Finding solutions to the waste problems generated by human activity represents a high concern of authorities and environment specialists for many years. Furthermore, energy conservation and reduction of the dependency from fossil fuels represents a top priority of governmental organizations at world level. The developments in alcohol industry have resulted in the increase of wastewaters which are highly polluted with organic substances, causing environmental pollution hazards. A wide...
Autori: Carmen Mateescu, Ionel Constantinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25626

Abstract Mathematical modeling of the ultrafiltration (UF) process is motivated by the complexity of retention phenomena that occur during the UF in conjunction with the complexity of wastewater matrices submitted to ultrafiltration, as well as by the need to predict the process behavior in extreme conditions, such as high pollution loads for UF-membrane cleaning cycles optimization or for automated control of the process. Thus, series of laboratory-scale ultrafiltration experiments were perf...
Autori: , George Barjoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25630

Abstract In this study the possibility to apply the oxidation process for treating textile effluents, by using hydrogen peroxide and Fenton process was evaluated through determining the color and chemical oxygen demand (COD) removal. The experimental variables studied include the dosages of hydrogen peroxide and iron salts, oxidation time and pH value. The result showed that oxidation process using hydrogen peroxide alone is inefficient in COD and color removal, since only 25 % of COD removal...
Autori: Abdelnaser Omran, , Marniyanti Mamat Noor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25631

Abstract Two different inocula - acclimated and non-acclimated to fat- were used to evaluate the methane production of cow manure, food waste and oily waste in batch assays. The inoculum adapted to fat had a better performance in the methanisation of substrates with significant lipids content. Furthermore, it is demonstrated that an increase in the ratio inoculum/substrate can enhance the initial methane production rate of oily waste when using a non-adapted inoculum, improving also the ultim...
Autori: Lucia Neves, Maria Madalena Alves, Raquel Ferreira, Rosario Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25634

Abstract The structural modification of external surface of NaY was investigated in order to enhance efficient biosorption systems consisting of a bacterial biofilm, Arthrobacter viscosus, supported on that zeolite, for removing hexavalent chromium from aqueous solutions. The supported bacterial biofilm reduces Cr(VI) to Cr(III) and this cation is then retained in the zeolite by ion exchange. NaY zeolite was modified by alkali-treatments using NaOH 2.0 M, with two different contact periods of...
Autori: Bruna Silva, Cristina Quintelas, Hugo Figueiredo, Isabel C. Neves, Manuel F.R. Pereira, Teresa Tavares
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25637

Abstract The aim of this work was the evaluation of the denitrification potential of a consortium of activated sludge adapted to anoxic conditions. As the carbon source is the main parameter influencing the denitrification process, in the first stage three carbon sources (acetate, citrate and glucose) were assayed in batch activity tests. The highest denitrification efficiency was ttained with acetate, being nitrate and nitrite completely reduced. The adapted sludge was then used as a potent...
Autori: Joana Azeredo, Pilar Teixeira, Rosario Oliveira, Zelia Fernandes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25638

? 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

? POLLUTION PREVENTION, A KEY TO ECONOMIC AND ENVIRONMENTAL SUSTAINABILITY ? A COMPARISON BETWEEN DIFFERENT SCENARIOS OF ROMANIAN MUNICIPAL SOLID WASTE TREATMENT BEFORE LANDFILLING ? A STUDY ON ENERGY CONSUMPTION IN ROMANIA ? ENVIRONMENTAL INFLUENCES ON STRESSED METALLIC SURFACES ? ASPECTS OF HYDRODYNAMICS AND MASS TRANSFER IN DIFFUSED AERATION SYSTEMS ? THE STATUS OF SOME SELECTED HEAVY METALS IN ROADSIDE SOILS OF BURSA PROVINCE, TURKEY ? PREPARATION AND CHARACTERI...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25656

? MUNICIPAL SOLID WASTE LANDFILLING AND TREATMENT OF RESULTING LIQUID EFFLUENTS ? ROMANIA: ENTREPRENEURIAL VALUES AND SUSTAINABILITY ? THE COMPRESSIVE STRENGTH OF WOODEN BRIQUETTES USED AS RENEWABLE FUEL ? ECO-FRIENDLY EXTRACTION AND SEPARATION METHODS OF CAPSAICINES ? ADDRESSING ISSUES OF GEOENVIRONMENTAL RISKS IN DOBRUJA, ROMANIA/BULGARIA ? ADSORPTION OF 2,4-DINITROPHENOL AND 2,6-DINITROPHENOL ONTO ORGANOCLAYS AND INORGANIC-ORGANIC PILLARED CLAYS ? APPLICATION O...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25659

? 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

? STUDY OF BIODIESEL PRODUCTION FROM OILSEED PLANTS II. EVALUATION OF BIODISEL PRODUCTION FROM SOME CULTIVARS OF RAPES ? STUDY OF BIODIESEL PRODUCTION FROM OILSEED PLANTS I. EVALUATION OF THE GENETIC SIMILARITY OF SOME Brassica Napus CULTIVARS USING RAPD MARKERS ? STRUCTURAL CHARACTERIZATION AND IN VITRO CYTOTOXIC POTENTIAL OF COAL DUST IN A ROMANIAN POWER PLANT ? MUNICIPAL SOLID WASTE MANAGEMENT IN BENGHAZI (LIBYA): CURRENT PRACTICES AND CHALLENGES ? COMPARATIVE ENVIRONM...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25661

? AN ASSESSMENT OF OPERATIONAL PARAMETERS FOR THE REMOVAL OF CHLOROPHENOLS FROM WASTEWATER ? ENVIRONMENTAL SCIENCES: A PSYCHOLOGICAL-BEHAVIORAL MODEL FOR RESEARCHERS ? ECOLOGICAL AGRICULTURE: DYNAMICS OF THE BIOLOGICAL ACTIVITIES IN SOILS CULTIVATED WITH MAIZE UNDER THE INFLUENCE OF ORGANIC FERTILIZATION ? SOLAR-ASSISTED JOULE-BRAYTON ENGINES USED TO REDUCE CARBON DIOXIDE EMISSIONS ? STUDY OF THE ENVIRONMENTAL EFFECTS OF HEATING SYSTEMS ? MIXED JET-VORTEX METHOD FOR ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25662

? COMPARATIVE CONSIDERATIONS ON THE STRUCTURE OF SOME MOLYBDENUM/NIOBIUM DOUBLE PEROVSKITES OXIDES ? THE INFLUENCE OF THE STORAGE TIME ON THE STABILITY OF BUTTER ? CaCO3 CONTROLLABLE SYNTHESIS BY DOUBLE EXCHANGE METHOD USING CaCl2 RESIDUAL SOLUTIONS ? OPTIMIZATION OF COAGULATION-FLOCCULATION IN THE TREATMENT OF CANAL WATER ? ANODIC DETERMINATION OF PENTACHLOROPHENOL FROM WATER USING CARBON NANOFIBER-BASED COMPOSITE ELECTRODE ? STUDY OF PRECIPITATES GROWTH IN COAGULATION ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25663

? COMPACT MICROPULSE BACKSCATTER LIDAR: AIRBORNE AND GROUND-BASED APPLICATIONS ? STUDIES OF THE IMPACT OF AEROSOL OPTICAL PROPERTIES ON CLIMATE CHANGE PROCESSES ? A STUDY OF THE AEROSOL OPTICAL PROPERTIES AT TWO AERONET STATIONS FROM ROMANIA ? COMPLEMENTARY ATMOSPHERIC URBAN POLLUTION STUDIES IN THE NORTH-EAST REGION OF ROMANIA, IASI COUNTY ? ?NGSTR?M TURBIDITY IN THE LOWER LAYERS OF THE TROPOSPHERE ? LIDAR MONITORING OF ANTHROPOGENIC POLLUTION AND NATURAL PHENOMENA ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25665

? Environmental Engineering and Management Journal, Vol. 9 Nr. 4 ? THE PROTECTION OF EQUIPMENTS USING VOLATILE INHIBITORS ? CONTINUOUS SURFACE TEMPERATURE MONITORING TO ESTIMATE SENSIBLE HEAT LOSS BY BUILDING FINISHES ? RECYCLE OF POLYAMIDE DYEING WASTEWATER FOLLOWING DECOLORIZATION WITH POLYMERIC SORBENTS ? PERFORMANCE EVALUATION OF AMINO ACID SALT-BASED COMPLEX ABSORBENTS FOR CO2 CAPTURE ? ADSORPTION EQUILIBRIUM STUDIES ON COPPER (II) IONS REMOVAL BY NATURAL WASTE USIN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25666

? HYDROGEL MICROSPHERES BASED ON ENVIRONMENTALLY FRIENDLY POLYMERS WITH POTENTIAL BIOMEDICAL APPLICATIONS ? STUDY ON THE MIXING EFFICIENCY IN A BASKET BIOREACTOR WITH IMMOBILIZED YEASTS CELLS ? MANAGEMENT OF WASTE FROM ELECTRICAL AND ELECTRONIC EQUIPMENT IN CYPRUS ? A CASE STUDY ? SEPARATION AND CHARACTERIZATION OF ANTHOCYANINS BY ANALYTICAL AND ELECTROCHEMICAL METHODS ? AN INTEGRATED DECISION AID FOR IDENTIFYING AND PRIORITIZING STRATEGIES IN FOREST MANAGEMENT ? INFLUEN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25668

? 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

Biosorption of lead (II) onto the biosorbent, represented by untreated S. cerevisiae and NaOH-treated S. cerevisiae was examined and the effects of contact time were investigated. The lead (II) biosorption was fast and equilibrium was attained within 90 mins. The maximum removal ratios of lead (II) for untreated S. cerevisiae and NaOH-treated S. cerevisiae after 3 h were 48.6% and 92.5%, respectively, with initial lead (II) concentration of 40 mg/L and optimum pH of 5.0. Data obtained from batch...
Autori: Ying Zhang, Yingjie Dai, Baiyin Liu, Fang Ma, Ru Zheng, Limin Donghttp://www.ecozone.ro/reviste.php?RID=25670

The removal efficiency of p-xylene from gas stream was experimentally investigated in a dielectric barrier discharge (DBD) reactor, which was combined with catalyst, MnO2/Al2O3 pellets, in the discharging and the afterglow area, respectively. The CO2 selectivity of the two kinds of structure was also discussed. The results showed that in both the situation, the synergetic removal efficiency of p-xylene by the DBD-catalyst hybrid system increased with increasing the discharge power and decreasing...
Autori: Hongxia Liu, Yun Liuhttp://www.ecozone.ro/reviste.php?RID=25674

Rhizobag incubation experiments were conducted to study microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), soil respiration and enzyme activity (urease and phosphatase) in the rhizosphere soil of three different wetland plants and its influence on the removal of total organic carbon (TOC) and total nitrogen (TN). MBC, MBN, soil respiration and enzyme activity were higher in the rhizosphere than in the non-rhizosphere soil of the wetland plants. Microbial activity in the rhizospher...
Autori: Defu Xu, Hua Fang, Xianghua Xu, Xiaoli Zhao, Yingxue Lihttp://www.ecozone.ro/reviste.php?RID=25679

A multi-stage filtration system located next to Lushan River in Gaofeng Town of Chongqing, P.R. China was built to indicate the impact of loading rate on agricultural runoff purification performance. The experimental system was proved to be effective in the removal of agricultural non-point source pollutants, and it was adapted to the changes of influent quality and quantity. The average removal rate of chemical oxygen demand (COD), ammonia (NH4 +-N), total nitrogen (TN) and total phosphorus (TP...
Autori: Lei Huang, Xu Gao, Wei-dan Xie, Jun-hong Chen, Xiao-xia Ma, Ming-guo Chen, Jin-song Guohttp://www.ecozone.ro/reviste.php?RID=25682

Treatment of mustard wastewater with high salinity and organic concentration by electrochemical degradation was studied. The influence of the critical parameters of electro-oxidation such as pH, current density, salt concentration and energy consumption on the removal efficiency of COD and NH3-N was studied using porous carbon electrode. It was found that the COD and NH3-N removal efficiency could be enhanced by increasing pH, current density and salt concentration. The current density of 0.032A...
Autori: Hainan Ai, Qiang He, Hongxiang Chai, Xuebin Hu, Tengrui Longhttp://www.ecozone.ro/reviste.php?RID=25685

Our investigation in 2007 revealed that the concentration of microcystin (MC-LR) in Miyun reservoir was 0.224 μg L-1, below the safety limit of surface drinking water in China (1.0 μg L-1). The phytoplankton community in Miyun reservoir was composed of 8 divisions and 84 species (including genera and varieties). The density of phytoplangkton was 393.71?—104 cells L-1 including 24.6% of Chlorophyta, 32.5% of Cyanophyta and 15.3% of Bacillariophyta. The toxin-producing cyanobacteria incl...
Autori: Huimin Li, Guisen Du, Yumei Wu, Dianwei Wu, Jingshi Wanghttp://www.ecozone.ro/reviste.php?RID=25691

Chlorine dioxide (ClO2) is widely used as disinfectant in tertiary sewage treatment process. In order to identify the impact of disinfection with ClO2 on treated water quality, secondary effluent pretreated by coagulation was disinfected by ClO2, and the characteristic of dissolved organic matter (DOM) and the biological toxicity of the water before and after disinfection were investigated. The results showed that ClO2 could remove part of DOM and the removal rate of hydrophobic (HO) component b...
Autori: Lihua Cheng, Xuejun Bi, Aihua He, Changqing Liu, Qi Wang, Zuliang Liaohttp://www.ecozone.ro/reviste.php?RID=25692

A series of sodium bentonites as raw material were prepared to the modified inorganic iron-nickel montmorillonites and organic composite montmorillonites. The structural characterization and morphology of the iron-nickel crosslinked modified bentonites were observed by means of IR spectroscopy, X-ray diffraction, scanning electron microscopy. The effects of the amount of bentonites, adsorption time and pH change on the adsorption of Cr(VI) have also been studied. The results indicated that the a...
Autori: Shao Hong, Cao Ninghttp://www.ecozone.ro/reviste.php?RID=25695

A submerged membrane bioreactor (MBR) was employed to treat wastewater containing different content of seawater in this work. During the process, the operating conditions were as follows: COD was 800-1000 mg/L, ammonium-N was 80-100 mg/L, pH was 7.5-8.5, mixed liquor suspended solids (MLSS) was around 7000 mg/L, dissolved oxygen (DO) was 2-4 mg/L. The results showed that the ammonium-N removal was better than COD removal. Sludge settling property was good in saline wastewater treatment, and the ...
Autori: Jin Li, Deshuang Yu, Dan Wanghttp://www.ecozone.ro/reviste.php?RID=25697

The solubility and sorption behavior of naphthalene in the presence of dissolved organic acid was studied. The presence of dissolved organic acids at lower concentrations had only a little effect on naphthalene sorption. However, when the concentration exceeds a certain concentration, a significant inhibition was observed. Moreover, the inhibition enhanced with the increasing concentrations of dissolved organic acids. The change trend on solubility is similar to the sorption of naphthalene, that...
Autori: Jin hua Li, Bao xue Zhou, Qing Zheng, Wei min Caihttp://www.ecozone.ro/reviste.php?RID=25698

The paper analyses the removal efficiency and fluorescence spectroscopic characterization of landfill leachate dissolved organic matter (DOM) fractions in the combined stripping, fenton oxidation, sequence batch reactor, and coagulation process. The high contents of DOM of landfill leachate in each process unit were fractionated into HA, FA, and HyI. The result was the combined process availability for effective removal of DOM fractions. The removal rates for DOM, HA, FA and HyI were 91.9%, 97.1...
Autori: Zhiping Liu, Jin-song Guo, Fang Fanghttp://www.ecozone.ro/reviste.php?RID=25702

Abstract:Drying wood requires a significant amount of thermal energy, in order to heat-up wood and evaporate the water inside it.Therefore, solutions to minimize this consumption are a topic of maximum interest for wood-processing industries. Employingsolar power for drying wood is not a novelty, considering that this possibility was already acknowledged at the end of the 17thcentury, but since then, kiln design was significantly improved, once with the progress of knowledge regarding the mechan...
Autori: Ion Marinescu, Mihaela Câmpean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25727

In this study, the application of freeze-concentration method to treat low-concentration polluted water was demonstrated. The effects of stirring, the temperature in a freezing cabinet and the volume of water involved in the freeze-concentration treatment of pollutants were investigated under laboratory conditions. The removal of pollutant by freeze-concentration treatment was also attempted. Results had shown that the ratio of pollutants removed was about 83% when the experiment was carried out...
Autori: Yingjie Dai, Ying Zhang, Baiyin Liu, Masahiro Teduka, Yongbo Lin, Shunitz Tanakahttp://www.ecozone.ro/reviste.php?RID=25709

The beneficial effect of urban plants in improving air quality is often mentioned in literature but is seldom quantified and valuated. Quantification and valuation of the benefits provided by urban plants allow direct comparison between plant species and help make more informed urban planning decisions. Based on fieldwork study and data processing, carbon dioxide (CO2) sequestration, oxygen (O2) generation, transpiration cooling, sulfur dioxide (SO2) removal and dust interception are quantified ...
Autori: Qijiao Xie, Zhixiang Zhou, Fang Chenhttp://www.ecozone.ro/reviste.php?RID=25710

Abstract:The textile industry uses high quantities of water which in many cases are disposed to the environment with inadequate treatment.In this work the effluents from the polyamide textile industry containing Bemacid Gelb, Bemacid Rot and Bemacid Blau weretreated by heterogeneous photodegradation. Treatment performances have been evaluated in terms of conductivity, turbidity, totaldissolved solids (TSD), chemical oxygen demand (COD), total organic carbon (TOC), biochemical oxygen demand (BOD5...
Autori: Luminita Andronic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25720

Abstract:The paper aims to present the new pattern of modular agriculture, as evolution of agri-food production in the coming decades aswell as to highlight the direct relation between this pattern and the massive energy support it requires.The paper basically deals with reactions to climate change, reductions of carbon emission, in addition to high quality and safetyrequirements for food production. The author envisages the PAC measures called for in order to ensure a sustainable developmentof ...
Autori: Romulus Gruia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25746

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 paper presents the results obtained when using one ketonic Mannich base BM (1-(2’-hydroxyphenyl)-3-(1-piperidinylamino)propan-1-one hydrochloride) as corrosion inhibitor in saline environment, for different types of carbon steels,with various alloying elements. The Mannich base was synthesized and used in corrosion experiments, in concentrations varyingfrom 0….1300 ppm. The corrosion experiments were performed by potentiodynamic polarization studies, with 50 mVs-1 scanrate. The ...
Autori: Andreea Milea, Cristina Bogatu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25754

Abstract:Hybrid nanocomposites may synergistically combine and enhance the properties of inorganic nanoparticles and organicmolecules.The objective of this paper is to examine particular nanocomposites films based on binary copolymers and inorganic TiO2nanoparticles from the structure and properties point of view. These nanoparticles were dispersed in maleic anhydride-styrene(MAS) copolymer by using elaidic acid, trans isomer of the oleic acid, as coupling agent in order to increase the compatib...
Autori: Alina Matei, Dana Perniu, Ileana Cernica, Irina Popescu, Lucia Dumitrescu, Vasilica Schiopu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25755

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:Our research was focused on developing some new procedures to reduce the biodegradable wastes by composting. The aim of thisstudy was to obtain and asses at laboratory scale the maturity of three compost samples of different proportion of vegetable waste,beech sawdust and sewage sludge by analyzing their FT-IR spectra and C/N ratio. The composting process was monitored by testsperformed weekly on the three samples in order to investigate the physical parameters (pH and electroconductivi...
Autori: Anca Sauciuc, Claudia Zaha, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25772

Abstract:The study involved investigating the effects of Cr(III) and the efficacy of powdered activated carbon (PAC) in reducing theinhibitory effects of Cr(III) on activated sludge under sequencing batch reactor (SBR) operation. The addition of Cr(III) into SBRsystem caused significant inhibitory effects on the activity of activated sludge as indicated by drastic drop in specific oxygenuptake rate (SOUR). The increase of Cr(III) concentration from 5 to 10 mg/L further deteriorated the treatment...
Autori: Eiichi Toorisaka, Makoto Hirata, Soon-An Ong, Tadashi Hano
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25773

Abstract:This study aimed to assess the coagulation performance using simple aluminum sulfate (Alum) and pre-hydrolyzed polyaluminumchloride (PACl) coagulation agents by conventional global parameters, i.e., turbidity and organic matter expressed by totalorganic carbon (TOC) and chemical oxygen demand (COD), and non-conventional spectrophotometric parameters.Non-conventional spectrophotometric parameters, expressed as absorbance recorded at different wavelengths, i.e., A254, A280,A365, allowed d...
Autori: Florica Manea, Georgeta Burtică, Ilie Pisoi, Smaranda Masu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25777

Abstract:In this paper, photo-catalytic process for treatment of phenolic wastewater by TiO2 nano powder immobilized on concrete surfacein a recirculation hydraulic flow was investigated. The process affected by different operational conditions that the optimum onescould be obtained from variables interchange. Taguchi method as a proper method for design of experiments and optimizationwas used to find optimum conditions. Selected five parameters at four levels were consists of initial phenol con...
Autori: Bita Ayati, Hossein Ganjidoust, Mohammad Delnavaz, Sohrab Sanjabi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25778

Abstract:In this study, removal of nitrate from aqueous solutions was investigated using an anion exchange resin, Purolite A-520E. Theinfluence of several experimental parameters, such as initial solution pH, resin dosage, phase contact time, initial concentration ofnitrate ions from aqueous solution, and temperature, has been examined in batch experiments. The results of this investigationreveal that the ion exchange process is favored at the initial solution pH (around) 6.8. The resin studied ...
Autori: Anca Ceica, Igor Creţescu, Ion Balasanian, Laura Bulgariu, Liliana Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25788

Abstract:Experimental research evaluated the possibilities of air treatment efficiency of a cylindrically shaped bio-charge, namely straw, toremove volatile organic compounds from the air. As determined during experiments, the air treatment efficiency of the straw biochargefor acetone removal reached 97.3%, while for butanol removal the efficiency was 86.0%. It has been determined that, withvolatile organic compound concentrations increasing biological air treatment efficiency is decreasing as h...
Autori: Alvydas Zagorskis, Petras Vaitiekunas, Pranas Baltrenas, Raimondas Leopoldas Idzelis,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25790

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 refers at adsorption studies using the maghemite nanoparticles as adsorbent for removal of the hexavalent chromium from aqueous synthetic solutions. Adsorption reached at equilibrium within 10 minutes and was registered as maximum at pH 2.54. The adsorption data were analyzed and fitted by Langmuir isotherm. Investigation methods for characterization of the nanoparticles were X-ray diffraction, scanning and transmission electron microscopy. Also, in order to evaluate the hexav...
Autori: Andra Mihaela Predescu, Andrei Predescu, , Eugeniu Vasile
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25805

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:The effect of organic carbon loadings (OCLs) on NH4+-N and Mn2+ removal was investigated using a novel approach of biological aerated filter (BAF) for drinking water treatment system. Three different OCLs of 0.2, 0.5 and 1.0 kg COD/m3.d were loaded into BAF which was operated in batch-wise at 24 h hydraulic retention time. The experiments resulted in higher COD, NH4+-N and Mn2+ removal percentages at OCL of 1.0 kg COD/m3.d with removal of 97.1%, 97.4% and 94.7%, respectively. The +-N ef...
Autori: Hassimi Abu Hasan, Noorhisham Tan Kofli, Siti Kartom Kamarudin, Siti Rozaimah Sheikh Abdullah
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25808

Abstract:The aim of the present study is the optimization of biosorption conditions using a metal tolerant actinomycete (strain 723) for the removal of lead ions from waste water in batch and dynamic flow mode. The optimum conditions for lead biosorption by the strain were determined as initial pH 3.0, biomass amount 2.0 g L-1, and initial metal concentration 400 mg L-1 in the batch condition. The maximum lead biosorption performance was obtained with a 19 mm diameter column, a 1 mL min-1 flow r...
Autori: Ayşe Betül Karaduman, Maria Julia Amoroso, Mustafa Yamaç, Sergio Antonio Cuozzo, Zerrin Pat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25811

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

This paper presents a study on the integration of two advanced treatment processes for the removal of priority organic processes from wastewaters: catalytic oxidation (Fenton homogenous process) followed by ultrafiltration. The aim of this study was to assess the removal efficiency for 4-chlorophenol (used as model pollutant), as well as the decrease in effluent toxicity in various processes conditions. The experiments have mainly focused on studying the effect of the oxidant dose of the catalyt...
Autori: , Cezar Catrinescu, Corina Petronela Musteret, Daniela Arsene, George Barjoveanu, Petru Apopei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25834

� SUSTAINABILITY IN ENVIRONMENTAL REMEDIATION � EVALUATING THE CLIMATIC CHANGES IN THE HYDROLOGICAL FLOW REGIME OF THE MOLDAVIAN AREAS � ENSURING ECONOMICAL AND FINANCIAL SUSTAINABILITY: STATE FISCAL CONTROL - A WAY TO PREVENT AND REDUCE TAX AVOIDANCE � COMBINED OXIDATION AND ULTRAFILTRATION PROCESSES FOR THE REMOVAL OF PRIORITY ORGANIC POLLUTANTS FROM WASTEWATERS � THE FREE LEVEL UNIFORM POST-DARCY FILTRATION THROUGH A SPHERE-MADE HOMOGENOUS MEDIUM � HSLA ST...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25838

The reactive extractions of propionic acid with TOA dissolved in three solvents with different dielectric constants (dichloromethane, butyl acetate, n-heptane) without and with 1-octanol as phase modifier have been comparatively analyzed. The results indicated that the mechanism of the interfacial reaction between acid and extractant is controlled by the organic phase polarity. In absence of 1-octanol, the structures of the extracted complexes are RCOOH.Q2 for dichloromethane and butyl acetate, ...
Autori: Alexandra Cârlescu, Anca-Irina Galaction, Dan Caşcaval, Mădălina Poştaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25938

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

The paper aims to present the environmental impact of pulp and paper manufacturing and the most important production and control practices to minimizing this impact. The environmental consequences of manufacturing pulp and paper from pulping and bleaching processes are discussed in qualitative and quantitative terms. In these processes, sulfur compounds and nitrogen oxides are emitted to the air, and chlorinated and organic compounds and nutrients are discharged to the wastewaters. Large quantit...
Autori: Adrian Catalin Puitel, Dan Gavrilescu, Gheorghe Dutuc, Grigore Craciun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25857

This paper presents original studies about the influence of mineral and/or organic fertilization on the minerals contents (P, Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Ni and Pb) in leguminous plants from permanent grassland situated in a hill area of Banat County. Determination of minerals in grassland is very important both for the nutritional or toxic effects of these elements and their compounds, in the plants, animals and environment. Phosphorous was analyzed colorimetric and all the others metals hav...
Autori: Alexandru Moisuc, Iosif Gergen, Monica Harmanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25858

This paper presents a new photo-Fenton procedure applied in oxidative degradation of organic pollutants using 4-chlorophenol (4-CP) as low biodegradable testing compound. The homogeneous photo-Fenton process was modified by using a photo-catalytic reactor equipped with a steel wire mesh which acts as source for Fe2+ catalyst generation into reaction medium and as heterogeneous catalyst, by iron oxy-hydroxyl compounds formation on the surface. The oxidation process was evaluated by measuring the ...
Autori: Adina-Elena Segneanu, Cristina Orbeci, Ion Untea, Mihaela Emanuela Craciun, Rodica Stanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25864

Chromium and cadmium are heavy metals that occur naturally in the environment and especially in soils. Their toxic effect is more pronounced at high concentrations and it depends on the oxidation states. While Cr (III) is considered an essential trace element for the metabolism of living organisms, Cr (VI) has a higher mobility and is easily soluble in soils and can be leached into surface water or groundwater, and taken up by plants. That leads to a toxic and carcinogenic effect to humans via i...
Autori: Dumitru Bulgariu, Florian Statescu, Maria Gavrilescu, Mariana Diaconu, Vasile Lucian Pavel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25866

Among the different types of waste products tested, the bark of different Pinus species have been identified as a promising class of low- cost sorbents for heavy metal binding. In this context, the potential of Romanian pine bark wastes as green and economical sorbent for cadmium (II) ions removal from aqueous solutions has been tested in batch conditions as function of initial pH, contact time, sorbent dose, metal ion concentration and temperature. The equilibrium data at three different temper...
Autori: Anca Miron, Brindusa Robu, Carmen Paduraru, Lavinia Tofan, Roxana Laura Mihailescu Amalinei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25871

Herbicides industry is a large consumer of water, as well as a major wastewater generator, its effluents contain priority organic pollutants in very high concentrations which have severe effects on human health and on the environment due to their toxicity and bio-recalcitrant nature, persistence in the environment and bioaccumulation. A vast number of herbicides and other priority organic pollutants have been found in wastewater effluents, surface water, and drinking water around the world. The ...
Autori: Bianca Weinberg,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25874

Newly prepared SnO2-CeO2 catalyst samples used as depollution catalysts were characterized applying low-temperature nitrogen adsorption (BET), X-ray diffraction (XRD), thermo-gravimetry (TG-dTG) and temperature-programmed reduction (TPR) methods. Pure SnO2 has higher surface area (17 m2/g) than the pure CeO2 (8 m2/g). Addition of organic tin oxide precursor to ceria in amount of 5 wt% slightly decreases the surface area of CeO2 (SSn5-Ce= 7 m2/g). The increase of tin oxide content to 10 and 20 wt...
Autori: , Anca Vasile, , Cristian Hornoiu, Jozsef Kovacs, Tatiana Yuzhakova, Veronica Bratan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25875

Nowadays, advanced wastewater treatment has become a stringent step for the removal of priority organic pollutants and many technologies have been proposed in order to achieve effluents with a superior quality for recycling or reuse purposes. This research is focused on the possibilities of using an integrated process, comprising 2 stages: the advanced oxidation process of ultrasonication and a membrane separation process, ultrafiltration. The main objective of the study is to assess the efficie...
Autori: , Daniela Cailean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25880

In this paper, Cadmium and Zinc removal from soil by phytoremediation was investigated. The experiments were carried out with two types of plants, Brassica napus and Triticales sp. Response surface modeling and optimization of Cd and Zn removal rate was performed for each type of plant under controlled conditions, i.e. as a function of Cd concentration, Zn concentration and pH. Although the maximum heavy metal uptake (i.e. 2.4 % Cd removal rate and 1.80 % Zn removal rate, respectively) was obtai...
Autori: Corneliu Pohontu, Gabriela Soreanu, Igor Creţescu, Matei Macoveanu, Paula Caraiman Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25881

Fluorescence spectroscopy is a promising approach to the characterization of natural aquatic components and organic pollutants, due to its rapid analysis and high sensitivity. Petroleum products had been studied, using fluorescence technique, in numerous occasions, as seawater and soil contaminant or as raw sample. Nevertheless, no complex assessment has been made on fluorescence real–time spectra of freshwater diesel oil contamination. This study reports a 5–days experiment on an urban rive...
Autori: Elfrida M. Carstea, Gabriela Pavelescu, Luminita Ghervase, Marina Tautan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25882

Fly ash and fly ash based zeolites are inorganics used for improving soil quality. In the current paper, the hydrothermal modification of fly ash was studied. Three methods have been employed for this purpose. The first method involved the use of an autoclave, where synthesis has been performed at a temperature of 120 0C and a treatment time of 4 to 8 hours. Within the second method, the modification of the ash at a temperature of 600 0C by fusion was carried-out. In this method, a mixture of as...
Autori: Corneliu Munteanu, Daniel Bucur, Lacramioara Rusu, Maria Harja, Marinela Barbuta, Ramona Carla Ciocinta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25885

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

Two experimental periods have been undertaken to investigate the biodegradability of sewage streams (mainly regarding the organic substances) produced by a gas cartridge production, filling and distribution company. A sequencing batch reactor (SBR) was used for the laboratory examinations launched with municipal sewage sludge with a concentration of approx. 3 g MLSS/L. The various conditions in the reactors followed each other cyclically (fill, anoxic, aerobic, settle, draw) three times a day. T...
Autori: Bence Fazekas, Karoly Reich, Krisztian Varga, Viktoria Pitas, Viola Somogyi, Zsuzsanna Banyai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25902

Abstract Effects of the aeration rate on nutrient removal from synthetic domestic wastewater using an intermittently aerated sequencing batch reactor (IASBR) were studied at ambient temperature. Two aeration rates, 0.8 and 1 L air/min, were studied. At the aeration-rate of 0.8 L air/min, removals of COD, NH4+-N, total nitrogen (TN) and PO43--P were 84%, 96%, 75% and 99%, respectively. At the aeration rate of 1 L air/min, removals of COD, NH4+-N, TN and PO43--P were 90%, 99%, 70% and 66%, re...
Autori: Liam G. Henry, Liwen Xiao, Xinmin Zhan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25941

Abstract A one-stage aerobic moving bed biofilm reactor (MBBR) (Reactor A) and a combined reactor (Reactor B) involving an anoxicgravel-bed biofilm reactor (GBBR) and an aerobic MBBR were applied to the treatment of heavily polluted river water. Reactorperformance was investigated throughout the experiment for almost 200 days and molecular techniques including PCR-DGGE,FISH/CLSM and FISH/FCM were used to reveal the evolutions of bacteria community, abundance of nitrifying bacteria and their...
Autori: Linyun Gu, Xiangchun Quan, Yin Qian, Yuansheng Pei, Zhifeng Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25942

Abstract An activated sludge from SBBR (sequencing biofilm batch reactor) reactor filled with Fe0  as filler had been acclimated to Fe(III)rich environment aiming at secure an enrichment culture of iron-reducing bacteria. The dissimilatory Fe(III) reduction ability and its efficiency on the effect of nitrogen and phosphorous removal by dosing different Fe(III) under anaerobic condition were investigated. The mechanism was also proposed based on the results derived from the experiment a...
Autori: Jie Li, Juanjuan Feng, Siyuan Zhai, Ya’e Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25943

AbstractIn this study, a novel excess activated sludge (EAS) based nitrification and denitrification process was developed using EAS toprovide nitrifiers and denitrifers for nitrogen removal from the reject water of a municipal wastewater treatment plant (MWWTP).This can achieve a significant reduction in the nitrogen (N) loading in wastewater treatment plants. The results show that theammoniacal-nitrogen (NH4+-N) and total nitrogen (TN) removal efficiencies were in the range from 74.7% to 93.1%...
Autori: Wei Li, Xiaoxia Yang, Xinchao Guo, Yongzhe Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25946

AbstractPartial nitrification for the biological nitrogen removal (BNR) via nitrite has recently gained interest for treating high-strengthammonium wastewater with low organic matter content. However, stability of partial nitrification is still a challenge in activatedsludge system. In the present study, the technique of aerobic granulation was developed to produce granules for stable nitritation,treating ammonia-rich inorganic influent with 400 mg NH4+-N/L. The morphology, physical properties, ...
Autori: An-Jie Li, Xiang-Chun Quan, Xiao-Yan Li, Zhi-Feng Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25947

AbstractWastewater from butyl rubber production is causing an increasing environmental problem due to its large quantity and complexquality. In this paper, two types of wastewaters generated from rubber synthesis, i.e. alkaline wastewater (AW) and cleaning andflushing wastewater (CFW), were investigated. Coagulation and flocculation were firstly applied to remove suspended solids(SS) from the AW. By single factor experiment, the optimum operational conditions were obtained as pH 8, PAC dosage 40...
Autori: Lujun Chen, Rui Liu, Wei Li, Wei Zheng, Yan Zhang, Ying Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25950

AbstractIn this paper, we report a study on structural evolution, magnetic susceptibility and arsenic content of colloidal pyrite fromXinqiao deposits in Tongling, Anhui Province, China. The pyrite was treated under N2 atmosphere and charaterized with X-raypowder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), magnetic susceptibility analysis, and atomicfluorescence spectroscopy (AFS). We observed that heating of colloidal pyrite in N2 atomosphere did not change the crys...
Autori: Dong Chen, Ping Li, Tianhu Chen, Xiao Zhu, Yadan Shi, Yan Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25951

AbstractVegetable waste was used as the fuel of a two-chamber microbial fuel cell (MFC) for simultaneous power recovery and wastedegradation. Effects of ultrasonic pretreatment, organic loadings, anolyte pH adjustment on the MFC performance wereinvestigated. Results showed that higher power generation and organic compounds removal efficiency were achieved in theMFCs with the vegetable waste pretreated with ultrasonication at >1.0W/mL compared to the un-pretreated control. A maximumvoltage of ...
Autori: Kun Tao, Xiangchun Quan, Yanping Quan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25953

AbstractThis paper reports the effects of COD:sulfate ratio on sulfate removal and electricity generation from oil shale retort watertreatment using microbial fuel cells (MFCs). Field-collected retort water was augmented with organics to obtain a range of initialCOD:SO42- ratios (0.5:1 to 2:1), and treated in two different MFC designs (tubular and two-chambered). The two-chamberedMFCs exhibited COD and sulfate removal 1 to 2 orders of magnitude higher than those of the tubular MFCs. The tubular ...
Autori: Ho Il Park, Lian-Shin Lin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25954

Geochemical cycling of reduced inorganic sulfur in sediments may affect water quality. This study investigated the reducedinorganic sulfur distribution and environmental behaviour in superficial sediments in different watersheds and coastal zones inBohai Bay, China. Acid volatile sulfur (AVS), chromium (II)-reducible sulfur (CRS) and elemental sulfur (ES) distributed insurface sediment were quantified. Total organic carbon and total nitrogen were presented in higher concentrations in the fluvial...
Autori: Robert Mortimer, Simon Bottrell, Wenjing Shi, Yanqing Sheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25959

AbstractPolyvinyl alcohol (PVA) is a typical refractory organic pollutant with low biodegradability and high molecular weight. Thispaper presents data on the radiolysis of PVA in aqueous solutions by using ionizing radiation. Response surface methodologywith Box-Benhken design of experiment was applied to analyze the interactions among initial concentration of PVA, absorbeddose, and initial pH of aqueous solutions on PVA removal efficiency. 9.4-89.4% PVA was removed based on differentcombination...
Autori: Jianlong Wang, Jinping Tian, Lujun Chen, Shijun He, Weihua Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25967

AbstractWastewater streams and particularly industrial effluents tend to increase in volumes and to get more complex in terms ofpollution. Nevertheless, nowadays the focus is directed towards recycling or reuse of treated wastewater so as to close the wateruse loop. Advanced wastewater treatment allows these possible applications by achieving good quality effluent to suit the newpurposes, but the implementation of this treatment stage is a difficult task. This study gives an example on how to ap...
Autori: , Daniela Cailean, Florina Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25971

AbstractEfficient large-scale recycling of polymeric wastes for automotives is of increased interest from ecologic and economic point ofview and represents an important goal for the car recycling industry. One alternative is to develop novel composite materials,relying on waste car parts, for indoor or outdoor large-scale applications, without using small molecular plasticizer or otheradditives but insuring a good compatibility for large percentages of thermoset plastics in the composite. Previo...
Autori: Anca Duta, Cristina Cazan, Dana Perniu, Mihaela Cosnita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25982

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

AbstractIn this paper we describe a wireless system, including smart sensing nodes for indoor air quality and unobtrusive cardiorespiratorymonitoring. The sensing nodes include a set of solid state gas sensors, sensors for temperature and relative humidity, amicrowave Doppler radar sensor for cardio-respiratory function, and appropriate conditioning circuits expressed by active filtersand amplifiers. The analog signals provided by the signal conditioning circuits is applied to a data acquisition...
Autori: Gabriela Postolache, Octavian Postolache, Pedro Silva Girăo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26007

AbstractThe developing of the infrastructure for wastewater collection and treatment in Romania is leading more and more to theproduction of huge quantities of activated sludge, as direct result of the application of state of wastewater treatment. The rapidand rational development of a national policy for management of activated on short, medium and long term has emerged as anecessity, and must be implemented urgently.The EU 27 countries consider environmental management of activated sludge as a...
Autori: Ilie Vlaicu, Ioan Neamt, Ioana Ionel, Mihail Reinhold Wächter
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26019

AbstractThe increased concentrations of priority pollutants in wastewaters have imposed the completion of conventional treatment withadvanced treatment stages (such as catalytic oxidation, membrane processes, adsorption, ion exchange, etc.) for their removal bychemical degradation and/or physical separation.In this study, 4-chlorophenol (4-CP) is proposed as model-pollutant for the priority organic pollutants present in syntheticwastewaters and several processes which can act as advanced treatme...
Autori: Carmen Teodosiu, Corina Petronela Musteret, Daniela Arsene, Daniela Cailean, George Bârjoveanu, Petru Apopei, Roxana Elena Apreutesei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26022

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

AbstractMultifunctional materials based on iron substituted anionic clays and their derived mixed oxides owning specific porousproperties and textural characteristics are synthesized, characterized and tested as photocatalysts in the process of the azo-dyesdegradation from aqueous solutions. The features of X-ray diffraction patterns point out the modification of the lattice parameterswhen Fe3+ is substituted Al3+ in the brucite like layer. N2 adsorption-desorption analysis reveals specific poro...
Autori: Carmen Gherasim, Gabriela Carjă, Magda Puşcaşu, Mihaela Bîrsanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26024

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

AbstractThis paper deals with the experimental investigation related to removal of hydrogen sulfide from simulated groundwater byadsorption/oxidation on activated carbons. Carbonaceous adsorbents were synthesized from peach stones by physical-chemicalactivation method and modified by oxidation following impregnation with Cu2+ by ion-exchange method. Obtained carbonaceousadsorbents were characterized by specific surface area and micropore volume. Surface chemistry properties were evaluated usingB...
Autori: , , Vasile Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26026

AbstractThe aim of this work is to characterize the flocculation process of a bentonite synthetic suspension with characteristics close toBega River from Timisoara, Romania. The time stability of the synthetic suspension was firstly investigated. After a few days ofcontinuous mixing a stable suspension was reached, stability being confirmed by monitoring the main physicochemicalparameters (pH, temperature, turbidity, dissolved organic carbon and initial particle size). In order to determine the ...
Autori: Alain Liné, Cosmina-Mariana Militaru, Ligia Barna, Teodor Todinca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26027

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 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

AbstractWater quality is an inportant concern for the ecosystem state from a particular region. Since the continuous urban and economicdevelopment induces a negative impact on entire hydrological cycle, this study investigates the water quality of a Romanian lake,located in the Surduc area - Timis County. This perimeter has undergone significant economic development in the past twodecades due to increased tourism potential and the number of holiday residences.We proposed hybrid materias for the ...
Autori: Adina-Elena Segneanu, Cornelia Bandas, Florentina Cziple, Ioan Grozescu, Paula Sfîrloagă, Titus Slavici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26040

AbstractZinc is an important metal for humans and the environment. Its intensive application in industry has led to water and soilcontamination. A lot of microorganisms both unicellular and multicellular can be applied for removal of metals from theenvironment. The process of zinc adsorption by cyanobacteria Spirulina platensis biomass was investigated. The concentrationsof 0.34 mM and 3.4 mM of ZnSO4ˇ7H2O were used. The process of biosorption of zinc was studied during 1-hour experiment.To dete...
Autori: Gheorghe Duca, Inga Zinicovscaia, Liliana Cepoi, Marina V. Frontasyeva, Sergey S. Pavlov, Svetlana F. Gundorina, Tatiana Chiriac, Valeriu Rudic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26041

AbstractThere are many treatment methods used to remove color from textile wastewater, and Fenton oxidation, a well known AdvancedOxidation Process is one of the most efficient. Apart of Fe(II), other metal ions have been used as catalysts in Fenton’s Reagent,and Cu(II) proved to be a good alternative.In this study the effect of the concentration of dye, catalyst and hydrogen peroxide were studied and optimized for thediscoloration process of Reactive Black 5 using a Fenton-like process, H2O2/Cu...
Autori: Andrei-Petru Bertea, Armand-Florin Bertea, Romen Butnaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26042

AbstractThis paper describes preliminary tests carried out in treatment plants serving two different pig farms in Northern Italy, in order toassess the feasibility of implementing biological sulphur removal from biogas produced by anaerobic digestion processes. Thisnormally consists of mixture of CH4, CO2, and other gases; in the presence of sulphur, H2S is also formed, which must beremoved prior to the gas use in thermal engines, to avoid corrosion phenomena. Sulphur removal in the plants consi...
Autori: Andrea G. Capodaglio, Arianna Callegari, Vincenzo Torretta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26074

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 present study reports the efficiency of almond shell as a cheap and available material for the removal of Cu (II) fromcontaminated aqueous solutions. The equilibrium experiments indicated that Cu (II) sorption obeyed the Langmuir isotherm at26, 40 and 55oC. The highest value of the maximum uptake (Qo) from the Langmuir equation was found 6.783 mg g-1 at 40oC.The various thermodynamic parameters such as ΔGo, ΔHo and ΔSo were also calculated. The values of ΔGo varie...
Autori: Soheil Aber
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26080

AbstractExperiments were designed to optimize the Cr(VI) adsorption on Salvinia cucullata. The significance of different adsorptionparameters along with their combined effect on the adsorption process has been established. A regression equation wasformulated by representing percentage of Cr(VI) adsorption as a function of different independent variables such as contact time,pH, adsorbate concentration and adsorbent dose. The insignificant terms were assessed through student ‘t’ test and are remo...
Autori: Saroj Sundar Baral
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26084

AbstractCombined electrocoagulation (EC) and homogeneous phase TiO2 photo-assisted system were applied to methyl orange (MO)wastewater treatment. Optimum including current density, initial concentration of MO, TiO2 concentration, pH, solutionconductivity and electrode distance were investigated. 98% decolorization (initial concentration = 500 mg/L) was achieved in 30min with a current density of 125 A/m2, electrode distance of 2.5 cm, electrolyte KCl concentration of 0.5 g/L, initial pH of 6.86,...
Autori: Yi Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26090

AbstractTwo laboratory-scale constructed wetlands planted with Juncus effusus were used to investigate the effect of nitrate load on thesulfur transformation dynamics related to the removal of organic carbon and ammonium. Organic carbon was removed at aconstant high mean level of 80% (inflow of 25 mg/L total organic carbon), irrespective of the nitrate load. In contrast, sulfatereduction responded immediately to the presence or absence of nitrate in an opposing manner, indicating a high abundanc...
Autori: Shubiao Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26095

AbstractA new approach to environmental protection management is the aerobic microbial digestion of food industry wastewaters byusing those waters as substrate, while the pollutants contained work also as oxygen-vectors. In biotechnology, oxygen masstransfer is a key parameter involved in the design and operation of mixing–sparging bioreactors and it can be analyzed by meansof the oxygen mass transfer coefficient (kLa). The influence of a second liquid phase with higher oxygen affinity (in this ...
Autori: Elena Folescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26097

The book edited by Haibo Xie and NicholasGathergood focuses on one of the most importantscientific issues of the 21 century which is thereplacing fossil fuel with sustainable alternatives suchas biomass. Fossil fuels are conventional rawmaterials for many industrial sectors includingchemical and energy production. Usage of fossil fuelis limited by their availability, price and carbonfootprint. Biomass is a renewable resource globallyavailable, cheaper and carbon sequestering. Step bystep shiftin...
Autori: Adrian Catalin Puitel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26101

Abstract In order to accomplish the water quality standards required for a specific use, the continental surface water is treated through a sequence of operations and unit processes. The treatment technological flowsheets carry out, partially or totally, the removal of various pollutants, every treatment step being used for improving one or more qualitative parameter. The treatment scheme is specific to water source type and water use. One of the basic operations for water treatmen...
Autori: Oana Tirtoacă Irimia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26136

Abstract Using sludge with dangerous substances content as an agricultural fertilizer can provide risks for humans and all environmental components. An important risk factor that had to be taken into account is the combination of sludge used as a fertilizer and agriculture activities that has its own consequences. In this paper, a risk evaluation for sludge disposal was elaborated. The most important risk factors in the studied case, wastewater sludge used as an agricultural fer...
Autori: Elena Manea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26141

Abstract After any treatment process of wastewater results residual sludge that is characterized depending on the type of the wastewater or by the sludge treatment type. The sludge treatment process can be divided in three important stages: the preliminary stage (with the sludge thickening), the stabilization stage, and the dewatering stage. The paper shows the results of the research for the identification of the most efficient organic cationic flocculants, which might be used wit...
Autori: Mariana Turcu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26149

Abstract The reason for carrying out this research is related to the significant risk of heavy metals present in wastewater on the environment and human health. The removal of heavy metal ions from aqueous solutions was performed in a batch system, using peat (from Poiana Stampei, Romania) as adsorbent. The efficiency of the process was predicted with high accuracy (correlation with experimental data more than 0.99) based on a feed-forward neural network with two hidden layers. The...
Autori: Gabriel Dan Suditu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26150

AbstractTo understand the typical organic pollutant contamination status of the main source water in Yellow River basin, samples werecollected from fifty source water points (including reservoir and river) in Yellow River basin. The samples were analyzed for therepresentative organic pollutants, including benzene homologous, chlorobenzene compounds, organophosphorous pesticides, and nitrobenzene compounds, total of 17 compounds. It was observed that all concentrations of the 17 compounds in the ...
Autori: Jijun Gao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26155

AbstractIn the conventional water flooding process of Daqing Oilfield in China, the occurrence of abundant sulfate-reducing bacterialpopulations has substantially affected the industrial production. This study was conducted from the perspective of ecologicalsuppression by operating anaerobic ABR reactors and dosing ecological inhibitors in a continuous-flow experiment. The practicaloperating efficacy was investigated and associated dynamic bacterial population succession was analyzed. Results sh...
Autori: Bin-song Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26165

AbstractA novel parallel A2O-MBR system was developed in this study based on the theory of denitrification with phosphorus removal.By utilizing the denitrifying phosphorus accumulating bacteria (DPB), the carbon source in the influent could meet the needs ofboth the denitrification and dephosphorization processes. Therefore, the carbon source restriction in conventional A2O processeswas resolved. The proposed system was inoculated with the sludge collected from the secondary settling tank in a m...
Autori: Liang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26170

AbstractA wet flue gas desulfurization (WFGD) system adopting electrostatically-assited twin-fluid atomization injector was presented.Spatial distributions of the droplet sizes, velocity for different voltages were measured using limewater and SO2 removalefficiency for different voltages and Ca/S ratios were tested using limewater drops. The physical and chemical improvementmechanisms were analyzed using spray characteristics and double film theory. The analysis showed that electrostatically-ass...
Autori: Zhentao Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26175

AbstractAs a new type of photoelectrocatalytic materials, the TiO2 nanotube arrays have drawn a lot of attention for efficientlyphotoelectrocatalytic organic pollutants degradation due to their highly photoelectrocatalytic properties. Yet, the performance ofphotoelectrocatalytic organics degradation using TiO2 nanotube arrays electrode is influenced by Cl-, a kind of typical reducingmaterial. This paper focuses on the effect of Cl- on the different photoelectrocatalytic performance of TiO2 nanot...
Autori: Jialing Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26177

AbstractThermal behaviour, microstructure and mechanical properties of the clay polluted by acidic and alkaline pollutants wereinvestigated by thermogravimetric/differential thermal analysis (TG-DTA), scanning electronic microscope (SEM), mercuryintrusion experiments, permeability coefficient and unconfined compressive strength tests. The clay polluted by alkaline solutionpresented distinct exothermic peaks at 304-310oC, while it’s not observed for the one polluted by acidic solution due to thed...
Autori: Zhao Ying
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26182

AbstractIn spite of the ambition of the Millennium Development Goals (MDGs), water supply and sanitation are still worryingly deficientin South-East Asia (SEA). Due to the rapid increase in population, increased urbanization and industrial activities, and absence ofa strong regulatory framework, water quality in this region is impaired due to the high levels of contamination. Because of thechallenge of providing safe drinking water from poor quality water sources, development of low-cost drinkin...
Autori: Pham Thi Thuy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26202

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

AbstractExcess biomass produced in the degradation processes of organic pollutants is creating environmental challenges for wastewatertreatment plants. The A+OSA system, a modification of the anoxic / oxic (A/O) process via insertion of a sludge holding tankinto a sludge return line, has been demonstrated to be capable of achieving simultaneous nutrient removal and sludge reduction.Here we report the results of an investigation aimed at evaluating the impact of the sludge holding tank on the bio...
Autori: Li Jia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26207

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

AbstractThe reuse of a wastewater treatment system was investigated using intermittent media infiltration (IMI) to evaluate the fecalcoliform (FC) removal efficiency with natural zeolite containing clinoptilolite from the state of San Luis Potosí, Mexico and itszinc-modified form (Zeo-Zn). The municipal wastewater, which was from Saltillo, Coahuila, Mexico, was treated for FC analysisfor four months. The physicochemical properties of zeolite were analyzed, and their behavior as filter media for ...
Autori: Sasirot Khamkure
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26212

AbstractWater-based printing ink has been used widely and perfectly in printing the packaging of food, drug, and wine products etc.However, due to the need of altering different colors of ink, most water-based printing ink wastewater was generated from theequipment cleaning process. Coagulation combined with Fenton process has been used for this kind of wastewater treatment inthis study, results showed that coagulation using polyaluminium chloride (PACl) as coagulant and ferrous sulfate (FeSO4) ...
Autori: Xiangjuan Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26214

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

AbstractDespite the Moderate Resolution Imaging Spectrometer (MODIS/Aqua) presently collects data on operational basis, evaluationof its biogeochemical products from standard bio-optical algorithms is scare especially in Arctic waters. The present study isaimed to evaluate several MODIS/Aqua bio-optical algorithms and MODIS/Aqua remote sensing reflectance (Rrs) products inKongsfjorden waters on the western side of Svalbard, Arctic. Data sets consisting of in-situ measurements of radiometric quan...
Autori: Palanisamy Shanmugam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26220

AbstractIn an urban environment, visibility strongly reflects human safety and welfare. Generally, visibility is dependent on particlescattering and absorption. The former is influenced by light wavelength, atmospheric gaseous species and particle characteristics,especially number and size distribution. Therefore, it is necessary to establish the relationship between visibility and particlecharacteristics. Furthermore, it is important to understand the formation mechanism of secondary aerosols. ...
Autori: Chih-Ming Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26221

AbstractIn 1979, the Gheshlagh river continuum was affected by the construction of Gheshlagh dam. More than three decades afterpresence and operation of this dam, there is a necessity to evaluate water quality in Gheshlagh reservoir. Therefore, water quality data was determined monthly from October 2008 to September 2009, to evaluate the impact of Gheshlagh dam presence and operation on the reservoir’s water quality. Eight parameters were analyzed (dissolved oxygen, biological oxygen demand,chem...
Autori: Fariba Rezaei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26225

AbstractIn this work the adsorption of Cu2+ and Zn2+ from industrial wastewater by peanut shells without any pretreatment wasinvestigated through optimization techniques such as a feed-forward back-propagation artificial neural network and a simplexalgorithm. The Levenberg-Marquardt algorithm was the best back-propagation algorithm, with a minimum mean squared error of0.000217 for Cu(II) and of 0.000229 for Zn2+. Mean square error on the validation set is used as an estimate for variance.Accordi...
Autori: Başak Mesci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26227

AbstractCd (II) removal efficiency of free and immobilized fungal consortia of 48-h-old Mucor sp. HI33 + 72-h-old Gliocladium virideAI003 + 72-h-old Aspergillus niger AH09 from aqueous solutions were tested under different aeration systems. Cd (II) removalby free cells under air bubble system aeration was higher (99.91%) than under shaker system aeration. Cd (II) removal byimmobilized fungal consortia was higher (83.18 %) under shaker system aeration and lower in air bubble system aerationrespec...
Autori: Arifa Tahir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26232

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

AbstractIn this research, response surface methodology (RSM) was applied to model the effect of main operational variables includinginitial pH, initial phosphate concentration, current density and reaction time on phosphate removal by electrocoagulation. It wasfound that the decrease of initial pH and initial phosphate concentration, and the increase of current density and reaction time are beneficial for improving phosphate removal efficiency. According to the ANOVA (analysis of variance) resul...
Autori: Mohsen Behbahani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26237

AbstractWastewater sludges are organic and nutrient-rich materials that could be used to improve soil tilth. However, the land applicationof sludge needs to be properly managed to avoid the detrimental effects on micro and macroorganisms in the soil. Earthwormsare one of the most important soil macroorganisms. Addition of sludge to the soil environment may impact earthworm activity,and in turn, soil productivity and health. In this study, sludge from the canned food industry was added to soil mi...
Autori: Efsun Dindar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26238

AbstractNon-pesticide persistent organic pollutants (POPs) under the Stockholm Convention include polychlorinated biphenyls (PCBs),polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDDs/PCDFs), polybrominated diphenyl ethers(PBDEs), polybromobiphenyls (PBBs) and perfluorooctane sulfonate (PFOS), which are industrial chemicals and/orunintentional byproducts that remain in the environment, bioaccumulate in human and animal tissue through the food chain, andhave adverse effects ...
Autori: Wen-Tien Tsai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26239

AbstractWashing black aluminum (Al) slag to obtain soluble salts is an important stage of the smelting slag treatment at technologicalprocess. This process is used to recover Al as a coagulant for water purification. This research aims at establishing the optimalconditions for washing (e.g. temperature (T), solid: liquid ratio (S : L), time, the recirculation waters in the system). The goal ofresearch was to determine: a) the removal with maximum efficiency of the soluble salts from black Al sla...
Autori: Romanita Teodorescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26243

AbstractThe aims of this study were to investigate the performance of anaerobic up-flow column reactor (AUFCR) and immobilizedactivated sludge biomass (ASB) potential for the adsorption of dye drimarene Blue-K2RL (Db-K2RL) and removal of chemicaloxygen demand (COD) from textile wastewater (TWW). AUFCR with ASB at flow rate of 50 mL h-1 and hydraulic retentiontime (HRT) of 10 h showed 95% dye adsorption at pH 4 and 87% COD reduction at pH 6 while non-activated sludge (NAS)showed only 60% of adsor...
Autori: Anwar Ahmad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26246

AbstractThe abundant availability of solid agroindustrial waste, sugarcane bagasse from sugar mills and juice extraction units, can bepotentially beneficial for the production of fermentation based biochemicals, paper boards and power. However, its role incausing bagassosis, an acute respiratory disease among the personnel handling large dry deposits has also been detected. Disposal of liquid waste whey from dairy industries poses a formidable threat to the aquatic ecosystem due to high BOD and ...
Autori: Manoj K. Ghosh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26248

AbstractThis paper continues the previous investigations regarding the technology for the Aluminum (Al) recovery as Al sulfate fromblack Al slag. Leaching is the next compulsory step in the Al extraction process. The paper studies the influence of mothersolutions´ (MS) recirculation resulted from the process within the system over the quality of Al sulfate and the siliceous residue(R) and, the aluminum nitride (AlN) hydrolyses in the leaching process. The optimum parameters determined are: *the ...
Autori: Romanita Teodorescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26250

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

AbstractThe aim of this study is to evaluate the treatment performance of mono azo dye Methyl Orange (MO)-containing wastewater byrecirculated up-flow constructed wetland (UFCW) with and without supplementary aeration. The successive anaerobic andaerobic treatment of the UFCW reactors could effectively remove color, organic matters and intermediate aromatic aminessimultaneously in a single reactor. With influent 50 mg/L of MO, the removal efficiencies of COD and MO were 91 and 75 %,respectively,...
Autori: Soon-An Ong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26254

AbstractA bench-scale anaerobic bioreactor for the anaerobic treatment of textile wastewater using anaerobic sludge was experimented.The Top and bottom of hybrid bioreactor were functioned with UAF (Up Flow Anaerobic Filter) and UASB (Up Flow AnaerobicSludge Blanket), respectively. The effect of organic loading rate (OLR) and hydraulic retention time (HRT) on treatment oforganic matters in the textile wastewater was investigated. The maximum removal of chemical oxygen demand (COD) and colorwas 9...
Autori: Reza Katal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26255

AbstractThe present study is aimed at a long-term treatment performance of a constructed wetland with horizontal subsurface flow atJimlíkov, Czech Republic. The system was put in operation in 1993 and the treatment performance is evaluated for the period1998-2009 due to non-existence of results from the beginning of operation. The parameters of concern were BOD5 (biochemicaloxygen demand), COD (chemical oxygen demand), TSS (total suspended solids), NH4-N (ammonia-N) and TP (totalphosphorus). A t...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26258

AbstractThis study is focused on simulating and optimizing design and configuration of anaerobic baffled reactor (ABR) by means ofartificial neural network (ANN). This approach is aimed to assess an efficient ABR performance in various operational conditionstreating municipal wastewater. For this purpose, to analyze comprehensively on a base of experimental data, the system isoperated in two pilots of 48 liters net volume made of 8 compartments. In 7 months, more than 130 sets of data are obtain...
Autori: Gagik Badalians Gholikandi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26260

AbstractThe applications of biofilm treatment technologies for domestic wastewater are being increased in many parts of the world. Theaim of the study is to assess a compacted aerobic attached growth fix-film unit (termed Bio-cache) for treatment of small volumedomestic wastewater. The system consists of the miniature plastic packing matrix, which provides a large surface area of 300m2/m3, so as to maintain the high rate growth of viable organisms responsible for organic degradation. The study o...
Autori: Alireza Valipour
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26266

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

AbstractThis paper presents the full-scale treatment of nylon production wastewater in a wastewater treatment plant in Henan province, Central China. In this case, a 9600 m3/d capacity wastewater treatment plant was installed to treat the wastewater generated from the production of nylon-66 salt, based on the biological anaerobic filter (BAnF) combined with an anoxic/oxic (A/O) process. The performance of the biological combined system was monitored over a 75-day period. The results revealed tha...
Autori: Chunlian Xu, Haiming Huang, Jiankun Dai, Jianrong Qi, Qianwu Song, Shaowei Wu, Wenjun Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26276

AbstractIn the present work an optimized experimental condition has been developed for the treatment of pulp and paper mill wastewater using an electrocoagulation process. The removal efficiency of 85 % COD and 94 % of color with a good repeatability of results (RSD <3%) has been achieved under the optimal experimental conditions of pH-7, treatment time of 2 h and a current density of 15 A/m2. In this study, wastewater from paper mill has been used and thus, high efficacy of removing the poll...
Autori: Chhaya Sharma, Rajni Sharma, Satish Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26281

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

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

AbstractSecondary aluminium production inherently generates significant amounts of slag of variate composition and including dangerous compounds. Consequently, a care treatment of the resulted slag is imperatively necessary for preventing the environment pollution and for recovering valuable materials even if present in low amounts. The aluminium recovering procedure is based on a chemical and hydrometallurgical slag treatment, leading to the technical grade aluminium sulphate (AS), possible to ...
Autori: Carmen Tociu, Cristina Maria, Elena Diacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26295

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

AbstractA new cell design which makes an efficient use of the cathodically evolved H2 to improve the mixing efficiency and thefloatation ability during electrocoagulation was used to remove dyes from waste solution. In this study, the decolorization andCOD reduction of colored solutions containing reactive and basic dyes by electrocoagulation was investigated using aluminumelectrodes in a batch mode. The effect of operating parameters such as current density, initial dye concentration, NaClconce...
Autori: El Sayed Zakaria El Ashtoukhy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26303

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 paper compares the electrocoagulation performance during the removal of Acid Brown 14, Acid Yellow 17, Acid Blue 113and Acid Black 172 dyes from aqueous solutions. For this purpose, pH changes and effectiveness of main parameters includinginitial dye concentrations and current densities for the selected dyes were examined. In addition, effluent turbidity, energyconsumption and amounts of released aluminum were also investigated. The present work shows that Acid Yellow 17 removaleffic...
Autori: Mahsa Taheri, , Mokhtar Arami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26310

AbstractThe monitored natural attenuation (MNA) of groundwater contamination is in many cases considered to be a cost-effective andappropriate strategy to manage the remediation of contaminated aquifers. A prerequisite for the public acceptance of such NAremediationapproaches is that the efficiency of the presumed NA-processes should be proven. This proof must be based on anextensive hydrogeological and in-situ characterization of the ongoing aquifer processes. Additional investigations of aquif...
Autori: Achim Möller, Anja Berning, Anne Berghoff, Bernd Mahro, Christoph Wortmann
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26312

AbstractThe removal and determination of toxic heavy metal ions in aqueous solutions has been given much more attention over the pastfew years. In this paper, a removal and separation/preconcentration method for cadmium species on Poly S15-g-EMA100 (a kind ofpolystyrene-graft-ethyl methacrylate copolymer) in water samples was developed. Some experimental parameters, such assolution pH, sample flow rate, type and concentration of eluent, amount of adsorbent and effect of common matrix ions werein...
Autori: Harun Ciftci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26317

AbstractThe aim of this paper was to study the performance of a single-stage rotating biological contactor with supplemental aeration interms of removal efficiency of organic and nitrogen content. Research was based on fifteen samples collected during the fouryear period. The wastewater was low strength with maximal measured concentration of 362 mg COD/l, 100 mg NH4/l, and 324mg TSS/L. The maximal measured removal efficiency of COD (chemical oxygen demand) and TSS (total suspend solids) were71% ...
Autori: Dragan Cvetkovic, Dusan Gordic, Milorad Bojić, Srdjan Stosic, Vanja Susterstic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26322

AbstractDue to its toxicity, persistence in the environment and specific properties, 1,2-dichlorobenzene (DCB) has been listed as apriority pollutant by the European Agency. In this study, the oxidation with ozone alone as well as in combination withultraviolet irradiation was applied for the degradation of DCB. This article presents the abatements obtained, after the varioustreatments proposed, in the levels of chemical pollution as monitored by chromatographic techniques (GC/ECD, GC/MS andHPLC...
Autori: Bertrand Sancey, Corina Bradu, Grégorio Crini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26328

AbstractA septic tank is an essential part of the decentralized wastewater management system. The aim of the experiment described inthis paper was to evaluate the impact of the method of sampling and hydraulic retention time (HRT) on the performance of acircular three chamber septic tank and to design a septic tank for a single household with four residents and wastewater flowrateof 0.6 m3/d. It was found out that the difference between suspended solids (SS) and chemical oxygen demand (COD) remo...
Autori: Ala Kirjanova, Mindaugas Rimeika, Regimantas Dauknys
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26329

AbstractIn this work, the effect of the addition of some nutrients on fungal growth and removal of Cr(III) were investigated. Theconsidered fungi, isolated from real tanning factory environment were Phanerochaete chrysosporium, Aspergillus niger and A.oryzae. Firstly, the optimal conditions for fungal growth were determined as a function of pH, contact time, temperature andagitation speed. Secondly, the effect of the addition of some nutrients on fungal growth was examined. Without the addition ...
Autori: Abdeltif Amrane, Mansur Zarrabi, Mohammad Noori Sepehr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26337

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

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

AbstractToxic cyanobacteria are an emerging and increasing threat to public water supplies across the world. As a result,it is essential tominimize the risk from toxic cyanobacteria and their metabolites, and the key is to be vigilant and monitor for cyanobacteria andcyanotoxins throughout the source water and the treatment plant. The present study aims to verify the validity of the traditionalprocess of coagulation and chlorination to remove microcystins (MCs) in the Xinxiang water plant in Chi...
Autori: Bang-Jun Zhang, Qiong-Qiong Ding, Wei-Hong Zhang, Xiao-Yu Li, You-Hai Xie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26345

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

AbstractA pilot scale Upflow Anaerobic Filter (UAF) treating tannery wastewaters was operated for 160 days. The UAF was fed with lowCOD/SO42- ratio (SO42- = 1810 mg L-1, CODtotal = 2530 mg L-1) for the investigation of sulphate and COD removal as a functionof substrates limitation and ammonia and sulphide inhibition. Sulphate-reducing bacteria (SRB) out-competed methanogenicbacteria due to the low influent COD/SO42- ratio, the high concentration of sulphide and the presence of inhibiting compoun...
Autori: Alberto Mannucci, Claudio Lubello, Giulio Munz, Gualtiero Mori
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26353

AbstractAmmonia pollution occurs frequently in urban water networks, which threatens the safety of water supply systems. Zeolite can beused for the removal of ammonium in the pretreatment of raw water for its peculiar adsorptive property to ammonium, but a largeamount of sludge from this measure could be a significant pollution source. In this work, the dewatering performance ofprecipitated sludge from the pretreatment of micro-polluted raw water was studied. Batch experiments of the simulatedco...
Autori: Bairong Zhu, Hao Chen, Huaizheng Li, Zhenliang Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26355

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

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

AbstractThe importance of air pollution for health results from the major role the air plays in preserving life. The air pollution is one ofthe most serious problems of the current society, both temporally and spatially. The air pollution of the environment is stronglyinfluenced by meteorological factors because of a complex combination of emission processes, transport, chemicaltransformations and the removal of pollutants through wet and dry processes. This study established a database on ozone...
Autori: Gilda Rusu-Zagar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26391

AbstractAcid rain is a general term used to describe acid depositions, i.e. rain, fog and snow (known as wet deposition), as well as acidgases and particles (known as dry deposition). Acid rain is of particular environmental concern in Romania, as many soils havelately become acidic, causing serious damages to plants, animals and human beings. The purpose of this study is to evaluate bysimulation the impact of acid rain on a podzol sample taken from the Retezat National Park, a Romanian protecte...
Autori: Clementina Moldovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26399

AbstractThe simulation of different situations that may occur in the operation of the mine ventilation network is performed on its virtualmodel, developed and optimized using dedicated software. Depending on the chosen scenario, on the network model are applieda number of changes (addition of new ventilation workings, addition / removal of branches and nodes, changes in aerodynamicparameters: pressure, air flow driven by the fan etc.), the ultimate goals being: to assess how the new model obtain...
Autori: Marius Cornel Șuvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26408

AbstractThe sludge treatment processes represent a priority when we refer to the municipal wastewater treatment, but can implicate verycomplex studies and applications if we consider the industrial wastewater recovery and treatment processes. Even if the industrialsludges are seen as wastes, they can represent an important resource if are properly managed in the storage, treatment andrecovery processes. This paper aims to identify some methods to optimize the coagulation and flocculation process...
Autori: Mariana Turcu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26444

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

AbstractA lab-scale packed-bed biofilm channel reactor that operates as a plug-flow system equipped with top aeration modules wasconstructed and evaluated. To assess the reactor performance a microbial community able to degrade linuron was used. Changingthe fluid flow rates and the linuron concentrations in the inflowing medium the volumetric loading rates of linuron (BV,L) weregradually increased from 0.29 to 14.93 mg/Lh. During the operation of the reactor, an airflow rate of 0.15 ą 0.05 L/min...
Autori: Erick Marrón-Montiel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26465

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

AbstractWater samples from two types of sources: partially treated sewage generated by a medium-sized city, with a high quantity oftotal coliforms and partially treated industrial wastewater, which contained mostly petroleum products from refineries, weretreated using the same concentration of TiO2 catalyst, for different exposure periods. UV-Vis and fluorescence spectroscopicevaluation of the composition changes of wastewaters under non selective oxidation conditions (achieved by photocatalysis...
Autori: Gabriela Pavelescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26474

AbstractPathogenic bacteria are fetal to human health, requiring cost-effective and safe approaches to be removed from drinking watersource. With poly-allylamine-hydrochloride (PAAH) stabilization, magnetic nanoparticles (MNPs) were introduced in this studyto remove pathogenic bacteria by electrostatic interaction and magnet capture. High removal efficiency was achieved for fourmain pathogenic species, as Escherichia, Acinetobacter, Pseudomonas and Bacillus, and over 99.5% of the pathogens can b...
Autori: Yunfeng Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26475

AbstractThe present study was undertaken to experimentally evaluate the heavy metal (HM) removal capacity of a municipal wastewatertreatment plant (WWTP) as a kind of mass balance. The aim of the work was to find a water or sludge stream in the WWTP thatcould be treated separately for heavy metal removal to maximize the same efficiency of the whole treatment technology.Although literature says that the HM content of sewage accumulates in the sewage sludge, the experimental results showed nocompl...
Autori: Gábor Gulyás
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26477

AbstractIn this study a new generation of plate-type laboratory air treatment biofilter is applied for the removal of gaseous contaminantsfrom air. The packing material for the biofilter consists of porous plates arranged vertically one after the other to produce acapillary humidification effect. The porous plate is made of polymer to secure the stiffness of the plate. Birch fibre granulesthermally treated in a steam explosion reactor are fixed on both sides of the polymer board. The granules ar...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26480

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

AbstractBiodegradation is a “green”, powerful and cost-effective way to remediate polluted environment. Still traditional biodegradationtechnologies of hazardous hydrophobic pollutants are generally limited by low bioavailability of such contaminants. That is whythere is a need to develop innovative approaches to enhance the efficiency of biodegradation. The aim of the present work was todevelop the basis of an innovative eco-friendly wastewater treatment technology for remediation of effluents ...
Autori: Tatiana Pantsyrnaya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26487

AbstractThe purpose of the present study is the comparative investigation of the calcium cations removal from aqueous solutions usingtwo strong acid cationic resins recommended during the last years for water softening. The performances of the two resins wereevaluated by the means of the cationic exchange capacity and the retention degree of the calcium cations. The evaluation of thetwo resins behaviour in the ion exchange process was performed by the means of the FTIR spectra recorded on the re...
Autori: Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26489

AbstractThe paper presents a hybrid method for the advanced removal of low biodegradable organic compounds from water, bycombining the separation selectivity of the membrane with the oxidation efficiency of the photocatalytic process. The aim of thisstudy is to evaluate the performance of the hybrid method to remove toxic compounds from wastewater. The advanced oxidationprocess, based on a photocatalytic reactor with continuous recirculation, ultraviolet (UV) radiations and a membrane, was usedf...
Autori: Cristina Orbeci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26490

AbstractIn this study, boron-doped diamond (BDD) electrode was tested in electrochemical oxidation and reduction processes using thesame vertical electrodes undivided cell in order to remove natural organic matter (NOM) and nitrogen compounds (NC) fromdrinking water. Boron-doped diamond-based electrochemical oxidation process has proven to be an efficient and versatilemethod suitable for NOM and NC in forms of nitrite and ammonium present in drinking water sources. However, the applicationof BDD...
Autori: Florica Manea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26492

AbstractBisphenol-A (BPA; 2,2-bis(4-hydroxyphenyl)propane) is a monomer used primarily in the production of polycarbonate andepoxy resins that has been reported to have estrogenic activity. The biodegradability of BPA has been previously investigated inseveral studies designed to simulate surface waters and biological wastewater treatment systems. However, there is littleinformation available about the phytoremediation of groundwater contaminated with BPA. Halophytic species are of specialintere...
Autori: Margarita A. Petoussi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26493

AbstractFluorescence spectroscopy and parallel factor (PARAFAC) form a powerful tool in separating different fluorophores and maybe useful in detecting the fluorescent signature of dissolved organic matter (DOM). Despite the large number of studies onfluorescence and PARAFAC it is still uncertain if this combination is capable to separate DOM from different water types byanalyzing the presence of specific components and their spectral shape. This paper presents a preliminary study on thefluoresc...
Autori: Elfrida M. Carstea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26495

AbstractConcentrations of seven heavy metals (Cd, Cr, Cu, Fe, Ni, Pb and Zn) in the discharged effluents of four wastewater treatmentplants located on the Romanian Black Seacoast, evaluated as average values for four seasons, during 2010-2011 are presented.Total and dissolved metals occurrence was investigated from seasonal samples, to assess the bioavailability of the heavy metalsin the discharged effluents. The analytical measurements were performed by flame atomic absorption spectrometry (FAA...
Autori: Elisabeta Chirilă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26498

AbstractA soot transducer based on the measurement of the electrical resistance value of the soot layer deposited on a finger structure wastested at different thermophoretic potentials. The soot, similar to that issued from the Diesel engines, in terms of particle numberand size distribution, was obtained by the incomplete burning of propane and subsequent dilution. The decrease of the resistancevalue in time was directly proportional with the temperature gradient. Thus a soot transducer is aime...
Autori: Doina Lutic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26503

AbstractAs air quality becomes increasingly deteriorated in world-wide cities, air quality monitoring has extended beyond the criteriapollutants (CO, SO2, NOx, O3 and PM) in order to include several toxic air pollutants such as volatile organic compounds(VOCs). In the present study it was investigated the presence of 29 VOCs and PM including PM2.5, PM2.5-10 and PM>10 fractions,in an urban area from Romania. The total VOCs was higher in the urban area (176.72 - 192.54 μg/m3) than in the r...
Autori: Carmen Roba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26504

AbstractAnalysis and monitoring of arsenic is still a challenging analytical task. Due to its complex behaviour (different forms of arsenicthat can be present depending on pH and oxidation states of arsenic) as well as demanding analytical procedures and instrumentaltools for control of arsenic concentration in drinking water which is set to 10 μg L–1, there are still some open questions andissues when arsenic is the scientific topic. In this paper the idea was to use a multivariate statist...
Autori: Vladana N. Rajakovic-Ognjanovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26506

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

AbstractPetroleum tanker trucks are integral vehicles for delivering fuel and other petrochemical products from place to place and must becleaned regularly. Pressure washing with hot or cold water serving to remove oil and filth from the tanker truck container,produces oily waste water with an oil concentration of about 300-500 mg L-1 which, according to environmental standards andregulations worldwide, must be disposed of and treated properly. In the present paper an integrated electrochemical ...
Autori: Konstantinos Dermentzis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26520

AbstractWater recycling and reuse, answering the needs of creating cleaner water resources, need to be closely related with water resourcemanagement and technologies. Current municipal wastewater treatment plants are capable to control conventional pollutants(carbonaceous compounds, particulate matter, nutrients). Priority organic compounds, like polyaromatic hydrocarbons,polychlorinated biphenyls, endocrine disrupting chemicals, personal care products, pesticides etc., may escape the treatment ...
Autori: Andreea Chelba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26521

AbstractTwo types of nanofiltration membranes had been used to study the influence of cross flow velocity on the membrane filtration ofdenitrification effluent (NF270 and NF90). Filtration had been conducted at constant transmembrane pressure of 5 bar andvariable cross flow velocity (0.03, 0.06, 0.15 and 0.39 ms-1). The obtained normal flux was 0.47, 0.58, 0.59 and 0.77for NF270membranes and 0.35, 0.38, 0.41 and 0.39 for NF90 membranes, the increase in cross flow velocity had enhanced fluxperfor...
Autori: Abdel Halim Fuqaha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26523

AbstractGreywater (GW) has attracted global attention as an alternative water source over the last few decades. GW treatment andreliable reuse require the overall qualitative characterization of samples from different sources. This paper represents aninvestigation of household-generated GW in the Northern Great Plain Region of Hungary. Modern and reliable analyticaltechniques and instruments (ion chromatography, microwave plasma atomic emission spectrometry, Zetasizer Nano Z analysis,etc.) were ...
Autori: Ildiko Bodnar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26528

AbstractAnaerobic degradation (AD) of municipal solid waste (MSW) depends on the moisture and nutrient distribution within thebioreactor; these factors are affected by leachate recirculation. In this work, the effects of leachate recirculation of 15 to 120 byvolume percentage (%V) on AD were studied. The ojectives of this study are as follows: a) to determine which recirculation rateprovides the best conditions for accelerated anaerobic degradation (AD) and b) to determine the optimal range of r...
Autori: Maria del Consuelo Hernández-Berriel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26557

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

AbstractHeavy metals in sludge have been one of the limiting factors for sludge reclamation, and therefore the changes of heavy metalsduring sludge treatment process should be concerned. This study investigated the detailed profile of changes of seven typicalheavy metals (As, Cd, Cr, Cu, Ni, Pb, and Hg) in the activated sludge during ultrasonic treatment process. The influences ofsonication time and ultrasonic power density were studied. Results showed that heavy metals in sludge were released i...
Autori: Tian Wan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26563

AbstractThe incorporation of phosphorus (P) into sediments and the changes in its bioavailability under intermittent P input and sedimentresuspension conditions were investigated via laboratory experiments. The sediments were disturbed daily for 10 min and thenallowed to settle for 1430 min after each disturbance to simulate the intermittent sediment resuspension conditions. The removalof soluble reactive P from the overlying water under sediment resuspension was greater than that under static c...
Autori: Li Dapeng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26567

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

AbstractThe aim of the present work is to study the performance of a constructed wetland for domestic wastewater depuration alsoworking as a microbial fuel cell (MFC) under two different subsurface flow modes in the upper cathodic compartment (horizontalflow, HF, or vertical flow, VF), and to compare the efficiency under both situations. A pilot-scale subsurface constructed wetlandtreating domestic wastewater was used, and the installation also included the electrodes and devices needed to work ...
Autori: José Villaseńor Camacho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26574

AbstractThe general aim of this paper is to demonstrate the sustainable management of a broad spectrum of wastes (livestock, industrial,agri-food, agricultural and non-recyclable fraction proceeding from waste treatment plants) in an integrated plant. Thetechnological development and practical application of the “Mixed Plant” concept is used to achieve this objective. In order tovalorize in a joint form all the above-mentioned categories of waste, two different processes have been integrated. Th...
Autori: Dolores Hidalgo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26579

AbstractThe potential application of methemoglobin from bovine blood to remove aromatic compounds in the presence of hydrogenperoxide has been evaluated. The organic compounds herein tested include phenols, amines or hydrocarbons, which arepollutants deriving from different industries and display high persistence and toxicity in waters. The oxidative process has beencharacterized by soluble hemoglobin and immobilized on Eupergit CM, using 4-chlorophenol as a model substrate. Theobtained ...
Autori: María Teresa Pérez-Prior
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26580

Abstract Wildfire emissions are a major contributor of atmospheric gaseous and particulate pollutants for local air pollution levels. With respect to wildfires, Turkey faces one of Europe’s most severe problems during summer. In this study, a database which holds data for wildfire emissions in Turkey for the last decade (between 2000 and 2009) was established in order to create a wildfire emissions inventory. The emissions of carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), n...
Autori: Faruk Dincer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26584

Abstract In this study, the COD removal of Azithromycin from synthetic wastewater (produced to have a composition similar to industrial wastewater) using a Fenton-like (Fe°/H2O2) system in combination with coagulation has been investigated. Chemical oxygen demand (COD) was selected as the main parameter to assess treatment efficacy in the current study (COD° = 390mg/Lequivalent to 200mg/LAzithromycin). First, the coagulation process was carried out on the synthetic wastewater and the...
Autori: Ahmad Reza Yazdanbakhsh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26586

Abstract Toxic chemical nature of tannery wastewater makes it difficult to be treated by routine biological treatment processes. Microbes, already present in tannery wastewater can adapt to these conditions and degrade the organics in tannery wastewater. In the present contribution, three bacterial electrogenic strains, tolerant to tannery environment, were isolated from soil contaminated with tannery waste and named as BS1, BS2, and BS3. Tannery wastewater was treated with these pure and mi...
Autori: Abhilasha Singh Mathuriya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26588

Abstract The biological removal of organic matter from a cosmetic wastewater by sequencing batch reactors has been optimized by analyzing the influence of the hydraulic retention time as well as the inclusion of anoxic and/or aerobic stages in the process sequence. Hydraulic retention time of 5 d led to the highest total organic carbon and chemical oxygen demand removal regardless the sequence used. Although a completely aerobic sequence can be used for cosmetic wastewaters treatment, the al...
Autori: Montserrat Tobajas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26589

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 Patzcuaro Lake, placed in the lacustrine zone of Michoacán (central México), has four municipalities around its shoreline, and is an important tourist attraction in the region. Because the area is predominantly rural it lacks many efficient public services, amount them adequate management of solid wastes that is reflected in the insufficient collection services and lack of landfills in the area. The object of this research was to determine the local environmental perce...
Autori: Otoniel Buenrostro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26604

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 Samples were collected for six months (nine storm events) to observe the contaminant loads from three highway segments at Rawalpindi, Pakistan. The contaminants analyzed include total suspended solids (TSS), total dissolved solids (TDS), total nitrogen (TN), chemical oxygen demand (COD), total organic carbon (TOC), total phosphorous (TP), sulphate (SO4), chloride (Cl-), iron (Fe), copper (Cu), zinc (Zn), lead (Pb), and chromium (Cr). Mass vs. volume [M (V)] curves were drawn to inve...
Autori: Hamid Iqbal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26617

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 The degradation of polycyclic aromatic hydrocarbons (PAHs) including fluorene, phenanthrene, anthracene, fluoranthene and pyrene were investigated under thermophilic and mesophilic anaerobic-methanogenic conditions. By using central composite design, the impact of PAH concentration and soil to inocula ratio were systematically studied for their influence on PAH removal and biogas production. During the first 30 days, PAH concentration decreased in all samples indicating that the ino...
Autori: Tahseen Sayara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26629

Abstract Soil organic carbon is one of the key substrates affecting methane emissions in paddy fields. However, not all soil organic carbon forms methane. This study therefore involved comparative analysis of the methanogenesis of different organic carbon sources (rice straw, chicken manure and pig manure) in paddy field soils. The results indicated that whereas methane emissions from the pig manure treatment (PM) were not significantly different to those associated with the application of c...
Autori: Jiamei Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26637

Abstract Dipyridine derivatives are used on large scale and pose significant environmental problems. We have synthesized dipyridine derivatives with: 5-chlorovaleric acid, α-dichlorhidrin, iodoacetamide and 11-bromoundecanoic acid. The synthesized substituted compounds were investigated by LC-MS. The adsorptive removal of dipyridine derivatives from aqueous solution has been studied using medicinal activated carbon. The adsorption rate has been investigated under the controlled process...
Autori: Ana Chira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26638

Abstract The interest in waterborne paints amelioration increased lately due to the toxicological effect of certain ingredients on human health, the restrictive environmental legislation and the depletion and escalation in price of raw materials. Research efforts in formulating waterborne paints are directed to insure low volatile organic compounds (VOCs) emission while maintaining and even improving their properties. This paper presents a waterborne paint formulation process. The required ...
Autori: Andrei Ionut Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26639

Abstract Wine analysis is a complex process, requiring multiple techniques and very in-depth multidisciplinary knowledge. Moreover, when talking about sensorial potent wines, like Muscat or Tămâioasă Românească (from aromatic Romanian grape variety), the identification and characterization of its volatile compounds is achieved through different methods, most calling for powerful solvents to separate the aroma substances. Supercritical fluid extraction is a powerfu...
Autori: Lucia Cintia Colibaba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26641

Abstract The utilization of manure for waste-to-bioenergy conversion processes may be a sustainable development choice rather than its traditional use as a fertilizer. Furthermore, the valorization of manure via thermochemical conversion routes and their integration with biological processes can provide an additional pathway in the utilization of residual biomass. On the other hand, the use of metal oxides might enhance the performance of thermochemical processes such as pyrolysis by either ...
Autori: Maria Fernandez-Lopez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26647

Abstract Anaerobic digestion was analyzed as the biological process that converts the organic matter present in various types of wastes, activated sludge from the wastewater treatment facilities respectively, into biogas. Latest advancements in the mathematical modeling, simulation and control practices have helped in gaining a better insight of the process. In this paper, an energy efficiency and techno-economical investigation of anaerobic digestion technology for the CHP cogeneration unit...
Autori: Alexandrina Zuza
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26648

Abstract Reactive Blue 19 (RB 19) dye removal from aqueous solutions by using layered double hydroxides containing nitrate as the intergallery anion (MgAlLDH) as adsorbents was investigated. The adsorption process was found to be influenced by the contact time, the initial dye concentration, the presence of inorganic anions and the temperature. The XRD and FTIR analysis evidence two competitive processes: adsorption and/or intercalation of the molecules may take place, depending on the initi...
Autori: Maria Celina Alexandrica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26651

Abstract A new catalytic mixture of nanosized dioxide (CeO2) and zinc oxide (ZnO) powders have been synthesized by surfactant-assisted solvo-thermal route, characterized and evaluated for photocatalytic activity. The prepared catalysts were characterized by TG, XRD, SEM and EDAX methods. SEM analysis showed that the catalyst particles have spheroidal shape and their sizes range from 50 to 80 nm, organised as uniform distributed aggregates with large surface area, leading to the existence of ...
Autori: Gabriela Antoaneta Apostolescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26655

Abstract Temperature-dependent d.c. electric conductivity of some recently synthesized organic compounds, 4,7-phenanthroline derivatives is studied. Thin-film samples (d=0.34-0.63 m) spin-coated from dimethylformamide solutions onto glass substrates have been used. Organic films with reproducible electron transport properties can be obtained if, after deposition, they are submitted to a heat treatment within temperature range of 298523K. Examined organic compounds in thin fil...
Autori: Cristina M. Al Matarneh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26656

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 The influence of exogenous form of heavy metals intake on their transformation in the soil is determined during model experiments. Distinctions in quantity of extracted mobile compounds of heavy metals in the soil depending on a form of addition various connections of Cu and Zn are established. The smallest mobility of Cu and Zn at addition of heavy metal oxides is observed. It is established that Cu accumulates mainly in the fraction connected with organic matter; Zn accumulates in...
Autori: Tatiana M. Minkina
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26662

Abstract Sites contaminated with hazardous materials pose serious risks to human health and ecological environments. Quantitative health risk assessment is a site-specific complex procedure requiring evaluation of all possible pathways. Several studies have focused on the evaluation of heavy metals or organic pollutants; however, only few studies focused on the evaluation of diverse pollutants such as heavy metals and organics. In this study, the health risk of heavy metals and organic pollu...
Autori: Hou Wei
ISSN: 1
http://www.ecozone.ro/reviste.php?RID=26663

Abstract In the current study, the structural and adsorptive properties of the micro crystalline cellulose beads, Cellets 200 and 350, as well as the possibility to use them as adsorbents for removal of reactive dye Brilliant Red HE-3B and cationic dye Methylene Blue from aqueous solutions have been investigated. Batch experiments were conducted to study the effect of adsorbent particles size (200-500 μm), initial solution pH (1-11), adsorbent dose, dye concentration, temperature (2-450C)...
Autori: Daniela Suteu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26668

Abstract Drinking water treatment using activated carbon (AC) decontamination offers effective methods for removing some organic compounds, tastes and odors, but it is not so efficient for metals, nitrates, microbial contaminants and other organic and inorganic contaminants. In the last years, nanotechnologies introduced several types of nanomaterials for organic, inorganic and biological removal of contaminants in drinking water, such as: sorption, filtrations and catalytic processes. In th...
Autori: Elena Radu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26671

Abstract Nowadays, an efficient wastewater management involves the use of advanced treatment technologies able to decompose hardly biodegradable compounds with reasonable costs at the lowest possible environmental impact. In our work we used one of the most efficient advanced wastewater treatment, the Fenton reaction and its photo-assisted version. The hydrogen peroxide was the oxidizer; despite its relatively high cost, its high activity in oxidizing of a large variety of organic persistent...
Autori: Vasilica-Ancuta Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26677

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 The performance of electrocoagulation (EC) process, a non-specific electrochemical technology, was investigated for the removal of carbamazepine (CBZ), an antiepileptic drug, from water. Experiments were carried out in synthetic wastewater in a batch cell. The respective influences of some key process parameters were studied, such as mixing conditions, initial pH, and current on aluminium electrodes. Experimental results showed that a CBZ removal efficiency of 62% was observed under...
Autori: Tania Yehya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26683

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 The main purpose of this research was to study the biodegradation ability of atrazine by using Arthrobacter sp. as free and immobilized cells of the strain DNS10, under several important environmental factors such as temperature, pH, salinity, substrate concentration. Furthermore, this paper objective was also to assess the process considering the immobilization under extreme conditions, such as high salinity and high atrazine concentration. DNS10 was immobilized on a sodium alginat...
Autori: Zhang Ying
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26702

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 The removal efficiency of algal biomass Chlamydomonas reinhardtii for Pb and Cu metal ions was evaluated in single and binary metal systems. Biosorption experiments were performed in solutions containing 0.2 g L-1 of algal biomass at 30oC and pH 6. Initial metal ion concentrations ranged from 10-7 M to 10-6 M. Thermal analysis of the biosorbent indicated that algal cells are composed of groups containing C, H, N, and S. The presence of ionisable functional groups responsible for bio...
Autori: Roula Flouty
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26709

Abstract Adsorption has proved to be an excellent way to treat industrial wastewater, due to its significant advantages like easy availability, inexpensive, ease of operation and highly efficient, compared to conventional expensive adsorbents like activated charcoal, alumina etc. The present investigation focused on utilization of Mangifera indica seed shell substrate for the removal of toxic heavy metals like Fe(II) and Mn(II) from wastewater. Mangifera indica seed shell substrate as an eff...
Autori: Tikaram D. Kose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26713

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 Planktonic algal samples were collected from lakes with different salinity (Salt Lake Brăila, Amara Lake, Fundata Lake, Techirghiol Lake and Black Lake-Sovata), in which mud used in balneary therapy is formed. A total of 189 species were recorded: 35 Cyanobacteria, 10 Euglenophyceae, 96 Bacillariophyceae, 33 Chlorophyceae, 3 Chrysophyceae, 2 Cryptophyceae, 1 Xantophyceae and 9 Dinophyceae. The highest number of phytoplankton species was recorded in Techirghiol lake (127 species...
Autori: Liana Gheorghievici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26719

Abstract Magnetite nano-particles (Fe3O4) were synthesized in order to be used as adsorbent for some toxic metal ions (Cr, Cd, Ni and Cu) present in aqueous solutions (industrial waste waters). The amount of toxic metals (Cr, Cd, Ni and Cu in quaternary aqueous solutions) before and after contact with the magnetite nano-particles was analyzed by flame atomic absorption spectrometry (FAAS). Different operational parameters such as metal concentration and pH of the quaternary solution, as well...
Autori: Ecaterina Matei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26721

Abstract The objective of this study was to identify differences between three of the most conventional UV-based advanced oxidation processes, namely photolysis, UV/TiO2, and UV/ZnO for the decolorization and mineralization of reactive red 198 (RR198) model dye in saline media. The study investigated influences of solution pH levels, salt concentration, reaction time and dye concentration on the degradation of RR198. The most effective dye removal and mineralization was observed at pH levels...
Autori: Gholamreza Moussavi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26724

Abstract Chitosan was cross linked with gluteraldehyde and chemically modified by introducing xanthate group onto its backbone using carbon disulfide under alkaline conditions. This crosslinked xanthated chitosan flakes (XC) was used as an adsorbent for the removal of mercury ions from contaminated water streams near the coal mines. XC was found to be far more efficient than the conventionally used adsorbent activated carbon. FTIR studies indicated the interaction both amine and the xanthate...
Autori: Avinash Gupta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26725

Abstract Large quantities of snail and clam shells are left as waste material when their meat is used as food for people. It has been a big problem that how to treat these wastes and usually these are land filled as wastes. In the present paper, these shells are studied as recycling resource for phosphate removal from solutions. Laboratory-scale batch experiments were conducted to evaluate the efficiency of snail and clam shells in removing phosphate from aqueous solutions. Major factors inv...
Autori: Ji Bing Xiong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26727

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 Optimum conditions for the reusability of red mud were explored testing both dried and HCl-activated red mud as a coagulant in the treatment of dyehouse wastewater. Treated dyehouse wastewater was further reused in five dyebaths with different mixture ratios of distilled water (D) and treated wastewater (W) for dyeing fabrics at three color strengths of three reactive dyes. Sludge obtained from the optimum dosage of HCl-activated red mud was tested for its reuse potential in the pro...
Autori: Aylin Yildiz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26738

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 In order to remove various radionuclides (Tl+, Sr2+and La3+) from wastewaters we used three solid supports of (styrenedivinylbenzene) grafted with different pendant groups (1-triphenylphosphonium; 2-izo-propylphosphonate; 3- aminoethylaminomethyl). The solid supports with different pendant groups were impregnated with ionic liquid (Cyphos IL-101- trihexyltetradecylphosphonium chloride). IR-spectra, EDX-ray and SEM image were used to characterize the adsorbent obtained after the imp...
Autori: Mihaela Ciopec
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26749

Abstract Natural herbicides may be more sustainable than their chemical homologues, but they are still toxic substances that can affect humans and animals. Implementation of natural herbicides may require just as many safety precautions as the application of commercial herbicides, hence the need not to confuse the term "organic" with "non toxic". Allelopathy is accomplished through chemical inhibition of species towards each other, being an antagonistic phenomenon. Respon...
Autori: Ana Maria Vîrteiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26752

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 Diclofenac (DCF), which belongs to nonsteroidal anti-inflammatory drugs (NSAIDs), is a biorefractory micropollutant and its removal from wastewaters has become strongly necessary. This paper dealt with the DCF removal from aqueous solutions by electrooxidation at boron-doped diamond (BDD) electrode. In addition, the dual character of BDD electrode in electrochemical degradation processes and their control was investigated. The electrooxidation process was assessed based on ultraviol...
Autori: Monica Ihos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26755

Abstract In this study, the electrocoagulation process using aluminium anodes was tested as alternative for coagulation process for the drinking water treatment using two types of real groundwater sources, characterized by low turbidity, moderate and high organic load, and nitrite and ammonium species for one of them. The optimum operating conditions determined to be pH 6.5, current density (i) 25A/m2 at 30 min resulted in removal efficiency of over 70 % for total organic carbon (TOC) parame...
Autori: Anamaria Baciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26756

Abstract Waste management does not try to dispose waste anymore but is searching for the best solution to manage valuable and scarce resources and reduce the negative impact on the environment. Preoccupation in Germany with regard to optimization of waste recuperation and valorization increases and separate collection systems for different waste fractions are taken into consideration. Within this study a pilot project was set up and its results are presented below. The investigation evaluate...
Autori: Mihaela Berechet
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26758

Abstract The intensive vegetable system means that more toxic organic and inorganic compounds are entering the environment. The aim of this study was to obtain the necessary answers on the content of organophosphorus pesticides (OPPs) regarding to quantify these residues on soils cultivated with vegetables in conventional, organic and conversion systems, and also determine which pesticide residues are going in edible vegetable parts. A number of 23 OPPs were analyzed from soil (50 samples) ...
Autori: Vasile Stoleru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26768

Abstract This paper presents a toolset for the efficient control of the indoor air quality and thermal comfort in retrofitted buildings. The refurbishment of existing buildings, compliant to actual regulations, often leads to airtightness and the consequent poor conditions for the occupants that could cause low productivity and even sickness. For this reason, the CETIEB (Cost Effective Tools for Better Indoor Environment in Retrofitted Energy Efficient Buildings) project developed innovative...
Autori: Gian Marco Revel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26770

Abstract This study is focused on the removal of leachable lead present in CRT (cathode ray tube) glass employing different chelating agents, NTA (nitrilotriacetic acid) and ATMP (amino trimetilen phosphonic acid), and then on the evaluation of their extractive capability. The operating conditions are the following: T=80°C, t=1h, pH=10, solid/liquid weight ratio=1/10, reagent concentration= 0.1 M. Afterwards a number of leaching tests at controlled pH were performed in the 5-9 range for ...
Autori: Elena Bursi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26772

Abstract This study focused on the fate of the most representative metals in urban wastewater treatment by the conventional activated sludge process. The research analyzed: distribution between soluble and particulate fraction in the different treatment stages, removal efficiencies as related to partitioning, and metal behavior during rainfall events. A mass balance approach allowed evaluating the behavior of the metals, migration between phases and final fate, in order to investigate metal ...
Autori: Giancarlo Cecchini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26773

Abstract Thermophilic anaerobic digestion is a suitable technology to treat agricultural waste because of its higher biogas production, hygienisation effect and solids removal efficiency. Although these benefits, poor effluent quality and instability are encountered in some cases. The anaerobic co-digestion of winery waste and waste activated sludge at 55°C, operating at 23 days HRT and with an organic loading rate of 3.2 kg COD/m3d, was characterized by accumulation of volatile fatty ac...
Autori: Cinzia Da Ros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26775

Abstract A VOC monitoring was carried out inside and outside a multi-storey car park in order to characterize the emission profile of vehicular traffic source in an indoor environment. BTEX, and in particular toluene, were the most abundant compounds in all monitored sites, with different compositions between indoor parking areas and outdoor sites. The motor vehicle exhaust and gasoline vapor emission in these enclosed parking garages were characterized by diffusion or degradation phenomena ...
Autori: Gianluigi de Gennaro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26778

Abstract The recovery of raw materials from waste represents a sustainable growth opportunity for those countries with limited mineral resources availability. A case study for an integrated approach to recover raw materials from spent fluorescent lamps is presented, with the aim of improving the current treatments which are only able to recover the glass fraction. In particular a hydrometallurgical process was developed to obtain valuable metals such antimony, copper, and rare earths (yttriu...
Autori: Roberta De Carolis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26782

Abstract The Bio.Lea.R project aims to demonstrate the performance of a landfill for less reactive, biologically treated waste (pretreated organic wastes) compared to a conventionally managed landfill, with regard to both environmental (biogas and leachate production) and economic aspects. The objective is to control the pretreated biodegradable waste through a liquid injection in order to achieve the same biogas quantity in a shorter time than in conventional landfill. Laboratory and full ...
Autori: Alberto Godio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26784

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 The aim of this study is to assess indoor air quality in an educational institute located in a suburban area of the Po plain (Italy). Samplings are carried out in preschool and elementary school classrooms, and also in the garden of the institute, to have information on outdoor levels. The monitoring is performed to determine the most important indoor pollutants (i.e. volatile organic compounds (VOCs), carbonyls and NO2), by using diffusive passive samplers. Sampling in the classroo...
Autori: Ivano Vassura
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26797

Abstract Treatment experiments for mature landfill leachate were conducted by using combined aged refuse bioreactor (ARB) process and sulfate radical oxidation. In the ARB process, the effects of wet/dry ratios, hydraulic loading, and influent introduction time on contaminant removal were investigated. In the oxidation process, Na2S2O8 was activated by heat to generate powerful oxidants, such as sulfate radicals, to oxide residual contaminants in the effluent. The removal of chemical oxygen ...
Autori: Zhanmeng Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26818

Abstract Waste engine oil contains hydrocarbons which are potentially carcinogenic. The objective of this study was to determine if organic wastes, specifically cow dung (T1) and poultry manure (T2) can improve the microbial degradation of the hydrocarbons. A questionnaire survey to determine generation, management and disposal of waste engine oil was carried out. A Complete Randomized Design, with two treatments and three replications was used to set up plots at Makerere University Agricult...
Autori: Richard Elijah Ssonko
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26820

Abstract The short-term effects of plant diversity (number of plant species and species compositions) on aboveground biomass, substrate inorganic nitrogen (N) concentrations, and substrate solution “effluent” N concentrations were studied in a subsurface verticalflow constructed wetland (CW). Results showed that (1) the number of plant species increased aboveground biomass (P< 0.05) but had no effect on the overyielding index DMax; (2) the species compositions and presence of ...
Autori: Hai Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26822

Abstract The feasibility of treating tannery wastewater having high organic loads was studied using ceramic membrane based microfiltration process. The common effluent treatment plant (CETP) of a centralized leather complex was selected for the study which accommodates about 450 tanneries in the city, processing hides from raw to finished products. Effluent sample was collected from different locations of the CETP, i.e. untreated composite effluent, effluent from primary clarifier and from ...
Autori: Priyankari Bhattacharya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26837

Abstract Composting has been attracting increased interest in the field of organic waste management. During composting, high-strength leachate is produced with a considerable amount of organic and inorganic pollutants. Lab-scale experiments were performed for the removal of chemical oxygen demand (COD) and chloride from compost leachate using a combined membrane system. The combined system consisted of microfiltration, ultrafiltration, and reverse osmosis (RO) membranes. The COD removal eff...
Autori: Vahide Şeyda Özyaka
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26847

Abstract This article presents the result of investigation on the spatial and temporal changes in water quality of Uluabat Lake. It examines the relationship between water and sediment quality parameters, and assesses the factors affecting eutrophication. Water and sediment quality are examined at 8 stations in the lake between May 2008, and May 2009. Water and sediment quality parameters measured are T, pH, EC, SD, NH4-N, NO3-N, TN, PO4-P, TP. Also DO, alkalinity, hardness, SS, BOD, COD, Ch...
Autori: Feza Karaer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26850

Abstract An experimental study on the hydrodynamics of fixed, fluidized and spouted granular bed was performed. With this aim two commercial adsorbent materials and a composite material obtained by impregnation with a hygroscopic inorganic salt were employed. The fluid phase consisted in dry air. The obtained results highlight the influence of grain size, material density and roughness over pressure drop and gas velocity. Increasing grain size leads to decreasing pressure drop and increasing...
Autori: Ioan Solomon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26854

Abstract This work presents the optimization of process variables to maximize the percent of Fe (II) removal, R (%), by chelating resin Purolite S930 from 34% CaCl2 solutions. To study the combined effect of the initial solution pH, initial Fe (II) concentration and resin dosage was used a 23 orthogonal central composite design and Response Surface Methodology (RSM) for analysis of experimental data. To optimize the regression equation was used The Gradient method. The study discovered that ...
Autori: Camelia Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26856

Abstract Free cells of Rhizopus oryzae were used to study adsorption of several cations (Cu2+, Zn2+, Mn2+, Ni2+, Cd2+ and Pb2+) from wastewater within various experimental conditions. The influence of biomass dosage, pH and temperature on the removal process was investigated. The sorption efficiency increased with increasing the temperature in the range from 25 ºC to 30 ºC and pH from 5 to 8. The maximum removal percentage was achieved at a biosorbent concentration 0.25 – 0.3...
Autori: Kolishka Tsekova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26857

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 This study investigated the use of tea waste to decolorize refractory dyestuff from textile wastewater. The influence of the solution pH and the contacting time were examined for various adsorbents, namely green tea-leaf powder (GTP), black tea-leaf powder (BTP), and powdered activated carbon (PAC). Results from batch experiments revealed that the reduction in true color (ADMI) increases with decreasing pH. The ADMI reduced from 1106 to 150 with 0.8 g/L of GTP at pH 2. The results a...
Autori: Chih-Huang Weng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26863

Abstract In this study, Moringa oleifera seed extract was applied as coagulant under different pH values (2.5 - 9.5), coagulant dosages (200-600 mg/L), initial dye concentrations (50-300 mg/L) and different settling times (0- 60 minutes) for R. Blue 19 and R. Red 120 dyes removal. Results revealed that with increase in pH (from 2.5 to 9.5), removal efficiency decreased from 95% to 87.3% for R. Blue 19 and from 97.2% to 62% for R. Red 120. By increasing coagulant dosage to 400 mg/L, removal e...
Autori: Ali Jafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26864

Abstract The adsorption of phosphorus (P) on sediment plays a significant role in phosphorus transport in aquatic systems. This research examined the effect of the main components of sediments (including iron (Fe), manganese (Mn) oxides and organic matter (OM)) on P adsorption and to evaluate their relative contribution with different sediment particle sizes. The sediments were separated into four particle-size fractions: 0-30 μm, 30-62 μm, 62-90 μm, and 90-125 μm, and then selec...
Autori: Yang Xiao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26873

Abstract Phytoremediation tests on heavy metals bioaccumulation were performed during 2012-2014 with aquatic species Lemna minor, Pistia stratiotes, Eichhornia crassipes, Vallisneria spiralis, Hydrilla verticillata, Cladophora glomerata on samples of contaminated waters collected from the toxic pond of waste landfill Şomârd-Mediaş, Sibiu County. With the purpose to check the species capacity for heavy metal removal and bioaccumulation, comparative analysis of water samples wa...
Autori: Dana Malschi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26882

Abstract The general goal of the research was to integrate organic food consumer behavior into the topic of the management of environmental security. The detailed objectives were to determine Romanian consumers’ beliefs about organic food and its role for environmental security, to identify consumers’ judgement of environmental problems, to establish the influence that demographic and social variables have on consumers’ beliefs and to emphasize the relationship between thes...
Autori: Dacinia Crina Petrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26886

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 Much attention is paid to removing formaldehyde from indoor air to decrease the health risk for urban inhabitants since formaldehyde is a main indoor pollutant causing various symptoms. In this study, formaldehyde removal by the shoots of potted Chlorphytum comosum (spider plant), Epipremnum aureum (golden pothos) and Aloe vera (aloe) was investigated with a dynamic chamber technique. The results indicated that the order of formaldehyde removal capacities for the plant shoots was C....
Autori: Haiping Hou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26908

Abstract The photocatalytic degradation (PCD) of methylene blue (MB) in aqueous suspensions of nano-sized TiO2 particles containing high concentrations of NaCl, MgCl2, and CaCl2 was studied. The rates of PCD and adsorption of ions were monitored by measuring the total organic carbon (TOC) and using inductively coupled plasma-atomic emission spectrometry, respectively. The results showed that the removal rate decreased with increasing concentrations of NaCl, MgCl2, and CaCl2. The trend for th...
Autori: Yuping Jiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26910

Abstract Heavy metals are considered important pollutants found in sewage sludge. That is why sewage sludge can have a limited use as fertilizer in agriculture. Some aquatic plants can remove nutrients and heavy metals from media as sewage sludge or contaminated sediments. In this paper, we investigated the effects of different concentration levels of two heavy metals (Ni and Cd), respectively, 10, 35, 85 and 20, 50, 150 mg/kg in sedimentary media on plant uptake of Ni and Cd, considering th...
Autori: Shahram Goudarzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26912

Abstract Synthesized silicates and their organically modified products have been least explored for their potential use in contaminated water remediation and also as slow release formulations. In this study, adsorption potential and applicability of surfactant modified clinoptilolite (SMC) and montmorillonite (SMM) nanoparticles as adsorbent and slow release formulation of 2,4- dichlorophenoxyacetic acid (2,4-D) have been investigated. The surface modification of hydrothermally synthesized s...
Autori: Deepesh Bhardwaj
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26913

Abstract This study investigated the feasibility of electrocoagulation (EC) process on the treatment of palm oil mill effluent (POME). The effect of several parameters namely initial pH, current density, stirring speed and operating time on removal efficiency of total suspended solids (TSS) and chemical oxygen demand (COD) were investigated. The experiments were conducted batch wise using 400 mL of the POME per batch and pair of aluminum electrodes immersed in the reactor. At optimal initial...
Autori: Firdaus Ghazali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26914

Abstract This study presents enhanced reduction of soluble contaminants in a modified electrocoagulation process that is capable of treating a mixture of aqueous contaminants. By incorporating an iron foam cathode, the process can remove aqueous trichloroethylene (TCE) by 99.1% and nitrate ions by 98.2%, which represents 58.1 and 20 percent higher than the removal rates achieved by iron plate cathode, respectively. pH and ORP measurements indicate the development of a reducing electrolyte c...
Autori: Xuhui Mao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26915

Abstract The present study was designed to determine the sound effects of ultrasonic treatment and the biologically mediated extraction of uranium from low grade black shale. Low grade uranium was subjected to fungal treatments assisted by sonication by conventional methods. In situ fungal leaching of black shale with different fungal strains in the presence of molasses as growth substrate resulted in highest leaching yield of uranium by Phoma tropica (57.73%) compared to Penicillium chrysog...
Autori: Fozia Anjum
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26919

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

In this work, coagulation features and characteristics of dissolved organic matter (DOM) in combined sewer overflow (CSO) wastewater were investigated. Ferric chloride (FeCl3) and polyaluminum chloride (PAC) were employed in the coagulation process. Results showed that both FeCl3 and PAC are effective in removing turbidity and total phosphorus (TP). Removal efficiencies were all above 90% when dosages were reasonable. Chemical oxygen demand (COD) removal efficiency was between 60% and 70%. T...
Autori: Wei-gang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26931

Moving bed biofilm reactor (MBBR) technique is a useful technology for the treatment of mature landfill leachate. The reactor start-up and acclimation processes illustrated that many factors, such as biomass, C/N ratio, and influent volumetric loading rates, could affect the ammonium-nitrogen (NH4+–N) and COD removal. The factorial experiments were carried out to determine the optimal reactor operational conditions, and the results demonstrated that when DO 2-4 mg/L, pH 7.5, and hydraul...
Autori: Wei Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26932

The pickling liquor used in the stainless steel manufacturing process is a mixture of nitric and hydrofluoric acid which generates wastewater with nitrate concentrations ranging between 500 and 6000 mgNO3--N/L. In the present study, laboratory-scale anoxic Sequencing Batch Reactors (SBRs) were used to treat high nitrate wastewaters. Two different sludge inocula were tested: one from a Municipal Solid Waste Leachate Treatment Plant (LTP), and the other from a Sewage Treatment Plant (STP). Meth...
Autori: Ana Isabel Pelaez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26933

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

Water scarcity, the degradation of freshwater resources, and wastewater pollution are reaching crisis levels, especially in arid regions of the world. The reuse of wastewater was investigated by using intermittent media infiltration (IMI) to evaluate fecal coliform (FC) removal efficiency. Twelve IMI columns were packed with soil and natural filtering materials (sand, zeolite, vermicompost and charcoal) at percentages of 25, 50 and 75. The municipal wastewater was treated for the FC analysis ...
Autori: Sasirot Khamkure
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26935

This study investigates the effects of earthworms and a variety of substrates on photosynthetic characteristics and rate of uptake of nitrogen (N) and phosphorus (P) by Iris pseudacorus L. (Iridaceae) in a constructed wetland system under greenhouse conditions. The study seeks to identify those factors that maximize the efficient removal of N and P. Four substrates were tested: pure sand, sand and soil, sand and organic matter, and a mixture of sand, soil and organic matter. The photosyntheti...
Autori: Defu Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26936

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 aim of this study was to examine the pollutant removal performance of a combined process using horizontal subsurface flow constructed wetland (HFCW) and an oxidation pond (OP) in the treatment of a decentralized domestic wastewater. Waters along the water flow and at different depths of the wetland substrate were sampled and analyzed during continuous operation. It was found that the HFCW-OP combined system presented good organic matter and phosphorus removal capacity. In the first year, ...
Autori: Wendong Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26943

One way to improve the performance of non-thermal plasma (NTP) reactor for volatile organic compound decomposition is by the introduction of ferroelectric materials into the discharge zone of NTP. This paper is a review of the breakthroughs and the current status of the applications of this technology for the abatement of volatile organic compounds (VOCs). It covers the process of energy generation in NTP, VOCs decomposition processes and the effects of critical factors such as type of packed...
Autori: Abdullahi Mohammed Evuti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26948

In this work biodegradation of basic fuchsin and methyl red by the blue green algae Hydrocoleum oligotrichum and Oscillatoria limnetica was investigated. The degradation of basic fuschin after 7 days by H. oligotrichum and O. limnetica was 92.44% and 90.23%, respectively. On the other hand, the degradation of methyl red by H. oligotrichum and O. limnetica after 7 days was 53.23% and 50.18%, respectively. The degradation of these dyes by algae seems to be related to the molecular structures of...
Autori: Ghada W. Abou-El-Souod
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26949

A drainage channel network in Vojvodina, Serbia, made for collection and transition of (sub)surface waters from waterlogged arable land areas, is exposed to diffuse and/or point contamination sources. Over time, the channel network has accumulated sediment material containing potentially harmful organic substances such as polycyclic aromatic hydrocarbons (PAHs). In this study, the concentration of 16 environmentally relevant PAH substances from 42 sampling points in drainage channel sediments...
Autori: Radovan Savić
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26950

Various plants were investigated here as bioindicators for control of the environment. Grass, moss and leaves of maple, birch and oak from different locations, i.e., mining, chemical industrial sites and open green area in a small industrial town in the southwestern Poland (Zloty Stok) were examined. Concentrations of As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Sr, Ti, V and Zn were measured by the ICP-OES and CVG-ICP-OES techniques. Infrared spectroscopy (FT-IR) was used to inves...
Autori: Lukasz Zarebski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26951

Ferric sulfate and aluminum sulfate were applied to stabilize the available arsenic in solid waste residue (SWR) from the organic arsenic industry, previously pretreated by the semi-solid Fenton process. NaOH, Ca(OH)2, and MgO were introduced to adjust the matrix pH. Toxicity characteristic leaching procedure (TCLP), synthetic precipitation leaching procedure (SPLP), and sequential extraction procedure (SEP) were carried out to evaluate the effect and difference on the fixation treatments of ...
Autori: Li-Fang Hu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26956