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 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

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

The heavy metal concentrations exceeding the standard admissibility, determine modifications of some cytological parameters. Therefore, by this paper, there were determined the concentrations of copper, iron, manganese and zinc from Prunus persica L. pollen grains (Research-Development Fruitgrowing Station, Constantza, Romania) using wet digestion followed by flame atomic absorption spectrometry (FAAS). Then, the main cytological parameters (such as citological viability and germination capacity...
Autori: Dan Mandalopol, Elena Doroftei, Manuela Rotaru-Stancic, Simona Dobrinas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25249

AbstractThe synthesis of some grafted polysiloxane and azo-polysiloxanes with potential applications as rheology modifiers or surfactants for waterborne paints is reported. Nowadays it became very important to design environmentally friendly systems exhibiting the best end-uses properties. Due to their complex architecture and their sensitivity to UV radiation the studied polymeric systems exhibit very interesting rheological properties. All the polymers containing the azobenzenic groups in the ...
Autori: Constanta Ibanescu, Ioana Moleavin, Iulian Nor, Nicolae Hurduc, Viorel Sandu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25252

AbstractThe study on distribution of oxygen transfer rate for a stirred bioreactor and simulated broths was carried out for four positions inside the broth and indicated the significant variation of kla on the bioreactor height. For all considered positions, kla initially increased to a maximum value with mixing intensification, decreasing then, as the result of the modification of mixing mechanism in presence of air bubbles. The increase of broth viscosity led to the significantly reducing of o...
Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval, Radu Z. Tudose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25270

AbstractThe Romanian strategy in the field of irrigations for the years of 2008-2011 consists of the modernization of the existing works covering about 3.1 mil. ha, while for the years of 2011-2025 the irrigation of additional area of 0.9 mil. ha is expected. In the climate conditions of Romania, the irrigation has a complementary character over the precipitations. Because of this reason, a correct regime of irrigations needs a very good correlation between watering and precipitations in order t...
Autori: Dorin Cotiusca Zauca,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25317

Abstract One of most important concern for the food specialists is to solve the sociologically impact problems in parallel with the decrease of the pollution degree through the advanced capitalization of byproducts from the food industry. The paper debates the capitalization of beer industry byproducts known as malt radicles, and their use in the bakery industry, for the obtaining of dietetical bread. Along the malt radicles, KCl and Prima Pan improver were added to the bread’s dough, and...
Autori: Monica Tulbure, Domnica Ciobanu, Adrian Gabriel Feraru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25432

Abstract In the new millennium to sustain a healthy life in harmony with nature, it will be extremely important to develop various materials and processes that minimize any harmful influence on the environment. The feasibility of sludge recycling in the brick manufacture was evaluated through laboratory testing. Several ceramic masses with clay, sand and various proportion of sludge have been synthesized and than characterized by their physical-mechanical properties. Sludge fineness also has ...
Autori: Ana - Maria Szoke, Marcela Muntean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25454

Abstract Mesoporosity of about 7 nm in ETS-10 titanosilicate was generated by postsynthesis treatment with hydrogen peroxide under microwave irradiation, resulting in an increased external surface area of the materials (55 m2/g). The influence of titanosilicate porosity and its surface modification by phosphorus atoms (ET(P)S-10) on the retention of some nanoions (??-emitting radioactive U(VI) and Th(IV) ions) and biomolecules (the proteins cytochrome c, papain, and ??-globulin) was investiga...
Autori: Robert Gradinaru, Sorin O. Valu, Stefan Postolache, Claudiu C. Pavel, Ion Sandu, Karin Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25455

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

Abstract The 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:In this paper, the influence of two types of imidazolium-based ionic liquids (ILs) on the properties of sycamore maple (Acer pseudoplatanus) veneers, at 25 0C, 60 0C and 80 0C has been studied by using contact angle measurements and Fourier transform infrared spectroscopy analysis. The measurements showed that wood wettabillity is increased by IL treatment. It has been determined that the ILs decrease the crystallinity and improve the flexibility of the cellulose matrix. Also, it has be...
Autori: Attila Porzsolt, Catalin Croitoru, Christian Friedrich, Silvia Patachia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25737

The present study describes the preparation of a filtering medium from a polymeric cellulosic support (filter paper) by functionalization with monochlorotriazinyl-β-cyclodextrin. The permanent immobilization of cyclodextrins confers the new material special properties and the potential for a better decontamination of liquid and gaseous effluents. The structure, physicomechanical and filtration properties of the filter paper, successfully functionalized with MCT-β-CD, have been emphasiz...
Autori: Ana-Maria Grigoriu, Constantin Luca, Florin Ciolacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25862

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

The first part of this work presents the development and implementation in the Benchmark Simulation Model No 1 (BSM1) of a modified Activated Sludge Model No 3 (ASM3). The enhanced ASM3 presented in this study has three modifications compared to the original ASM3. The first modification is the representation of the simultaneous heterotrophic biomass growth on the primary substrate and on the internal storage products. Second, nitrification is modeled as a two-step process with nitrite as an inte...
Autori: George Simion Ostace, Paul Şerban Agachi, Vasile Mircea Cristea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25865

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

AbstractThis paper presents some results of the brain electrical activity’s analysis in case of the magnetic stimulation. It was recorded andanalyzed the electroencephalography (EEG) signal during magnetotherapy procedures in abdominal region, considering this factlike as a possible exposure of subject at magnetic field. The recordings of EEG signals are performed on 13 healthy volunteers inthree conditions (before, during and after magnetic stimulation), using three types of sinusoidal pulses. ...
Autori: Călin Corciovă, Doru Andriţoi, Mariana Ciorap, Radu Ciorap, Valeriu David
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26005

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 2010 in the area of Iasi city, Romania started the “Water-course regulation of Bahlui River, County of Iaşi” a project which inits first phase of development. It has as the main purpose to improve stream flow capacity and to guarantee the defending againstflood. Also, the project aim at developing a section of approximately 2.5 km located between the Stone Bridge (km 14+073) andTudor Vladimirescu Bridge (km 11+615) for recreational purposes. In order to obtain water storage, it i...
Autori: Catrinel-Raluca Giurma-Handley, Costel Boariu, , Tomi-Alexăndrel Hrăniciuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26050

Abstract Large amount of radioactive sources generate gamma rays of various energies and intensities. Gamma-ray spectroscopy is applied for the quantitative study of the energy spectra of gamma-ray sources. In the present paper, a statistical analysis of the energy spectra of gamma-ray spectroscopy monitored during 4 years at the “Dosimetry and Radioprotection” Laboratory from ”Vasile Alecsandri” University of Bacău is provided. Several new mathematical parameters were calcula...
Autori: Marius Stamate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26144

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

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

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

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

AbstractThe changes caused by windthrows regarding spruce stand lead to significant environmental modifications. In this article aspectsregarding the detection of environmental changes caused by windthrows in Sanmartin Forest Division within Miercurea CiucForest District of National Forest Administration are covered using Landsat 7 ETM+ satellite images. Two pre and post-eventsatellite images, from 2001 when massive windthrows occurred, were used in this study. The techniques used in changesdete...
Autori: Iosif Vorovencii
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26311

AbstractThe explosion phenomenon is an extremely complex physical-chemical process, which leads to the physical change of objectsand objectives encountered on the propagation path, as wells as the chemical modification of the underground atmosphere fromthe area of influence. During the underground propagation of the explosion, the most affected objectives are the following:ventilation constructions, regulation and insulation doors and the insulation dams. Dynamic pressure waves generated by thee...
Autori: Doru Cioclea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26401

Abstract This paper presents the results obtained using the prehydrolysis treatments of rapeseed stalks depending on regime and the catalyst. The vegetal materials were subjected under different temperature conditions and then characterized for the yield reducing substances. The differences between samples have been established by using FTIR and depend on the successive hydrolytic treatments of dynamic and static regime in the presence of various catalysts. The experimental data show that th...
Autori: Corina Măluţan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26654

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

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

Abstract A bibliometric analysis along with a brief historical and modifications overview and scientific applications was carried out to reveal the impact of Brunauer-Emmett-Teller (BET) isotherm on scientific research. The data was based on the Science Citation Index Expanded (SCI-EXPANDED) database of the Thomson Reuters Web of Science. BET isotherm received a total of 10,418 citations from its publication to 2012. Among them, 9,117 (88%) were research articles by 20,108 authors with 95% m...
Autori: Moonis Ali Khan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26839

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 paper presents the results of electrocardiography (ECG) signal acquisition, the heart rate variability (HRV) extraction method and the statistical processing of the extracted features on human exposed below the maximum level of exposure of the electromagnetic field. The ECG recordings were acquired in common situation of electromagnetic fields exposure occurring in hospitals: the power line supply (50 Hz), the fluorescent lights tubs (5 KHz - 150 KHz) and the electrosurgical un...
Autori: Narcis Iulian Adochiei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26904

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

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

In the present study, the effects of two methods for thermal sanitization of soil, by oven and by autoclave, and two non-ionizing radiation sterilization methods, UVC and microwave on pH, conductivity, dry weight, total number of germs and respiration of samples from neutral commercial soil were evaluated, using international standard methods. Also, the infrared and UV-VIS spectroscopy were applied for the determination of chemical properties and structural characterization of humic acid and ...
Autori: Dumitra Raducanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26985

Emission from the combustion processes can cause adverse effect to the environment. The formation of pollutants such as oxides of nitrogen (NOx), carbon monoxide (CO), carbon dioxide (CO2) and oxides of sulphur (SOx) are hazardous and harmful to the ecosystem. Due to these pollutants and also depletion of fossil fuel, several steps should be taken in order to mitigate this problem. Biofuel is known as the potential replacement for fossil fuel. Envo Diesel is one form of biofuel that can be us...
Autori: Mohammad Nazri Mohd Ja’afar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27011

New processes of wastewater treatment plant (WWTP) to treat large rainfall influent flow of upriver combined drainage system were proposed by taking a WWTP in Tianjin as an example. InfoWorks and Biowin software were applied to simulate the upriver combined drainage system and the performance of proposed processes, respectively. After the model calibration and validation, the influence of rainfall anticipated on influent flow, water quality, and response operation of WWTP were studied. The resul...
Autori: Yin Jin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27171

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

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

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

Carbonaceous materials were obtained from waste tyres and their potential application as hydrogen sulphide adsorbents was investigated. The adsorbents were obtained by pyrolysis of waste tyres and physical (CO2) or chemical (KOH) activation at 550 and 800ºC. The effect of modification conditions on the performance of waste tyres based materials as adsorbents of H2S at room temperature in dry and wet conditions was investigated. Sorption capacity of such adsorbents was found to strongly depe...
Autori: Magdalena Hofman-Bieniek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27263

This study aims to evaluate the effects of Fe2+ present in carbonated natural mineral waters on the decomposition of hydrogen peroxide (H2O2) used as sanitizing agent of the collector water tanks and the oxidation of NH4+ to NO3– and NO2– nitrogen compounds from bottled carbonated natural mineral water by the Fenton process. This evaluation suggests that the distribution of the nitrogen compounds, at certain concentrations of H2O2 is influenced by facilitated Fenton reaction in the p...
Autori: Daniela Bogdan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27279

This paper presents the research performed in view of emphasizing the effects of mineral aggregates extraction on the geomorphological and hydraulic features of Moldova body of water. The effect on the geomorphological features was assessed by overlapping the cross profiles (22 profiles) and long profiles (2 profiles) from the entire area studied. These profiles were obtained by topographical measurements on the starting date (July 2013) and on the research end date, respectively (March 2015). T...
Autori: Paula Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27335

Inventory and monitoring of total organic carbon stock (TOC) it’s an issue of actuality in the context of breaking into the atmosphere an alarming quantity of CO2 result of human activities. Management and sustainable management of forest and agricultural ecosystems can have a positive influence on maintaining optimal stock of carbon sequestered. A case study achieved in the Humor catchment reveals that changing the land’s utility means important modifications in the quantity of the ...
Autori: Eugen Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27336

The objective of this study was to develop a naturally dyeing process of 70% wool /30% Angora mohair blended yarns by using bio-mordants as an environmentally friendly alternative for the conventional metallic salts. Bio-mordanting operation was achieved by using of condensed tannin extract from quebracho bark trees. Conventional mordanting has been performed using the conventional mordants like copper sulphate and tin chloride. Another specific objective of this study was to investigate the pos...
Autori: Ioana Stanculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27337

In Romania many rivers have been canalized by non-submersible damming, flow diversions and channeling towards new routes, transversal arrangements, etc. The modifications of natural flow regimes brought severe impacts on all ecological functions of wetlands and on the natural functioning of river-floodplain systems. Due to damming only few of the floodplains function nowadays in a natural manner. Rivers and wetlands rehabilitations are bringing the well-known environment benefits, reason for wh...
Autori: Lăcrămioara Vlad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27462

Nowadays, the polyolefins (polyethylene, polypropylene) are increasingly consumed in large amounts for many applications. This issue causes a concern regarding the environmental impact of the waste materials generated after the first use. Mechanical recycling of polyolefin wastes helps to conserve oil and gas resources and reduce the polymeric waste accumulation in environment. In this paper, the modification of some post-consumer polypropylene (rPP) properties coming from packaging processi...
Autori: Maria Râpă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27493

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

The performance of cathode affects the overall performance of a microbial fuel cell (MFC), and cathode configuration affects the fabrication cost of this bioelectrochemical system in a large way. Various modifications in cathode structures have been observed in MFCs. Among them air-cathode MFCs are considered to be the most efficient and sustainable option due to elimination of aeration, as required in aqueous cathodes which consumes energy and increases operating cost of MFCs. An air cathode us...
Autori: Pritha Chatterjee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27680

Novel systems based on modified azo-polysiloxanes and gelatin with potential biological applications were prepared and characterized. Simultaneous rheological and UV irradiation studies allowed evidencing structural modification inside the gelatin matrix. For all analyzed samples a shift in the temperature corresponding to the physical network destructuration, from 30˚C (corresponding to gelatin) to 40˚C (for the composite) was noticed. The experimental results proved the existence of ...
Autori: Elena- Luiza Epure
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27699

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

The research focuses on the assessment of the main agro-productive properties and the evolution of the mollic reddish (red-brown) preluvisol between the Jiu and Olt rivers, under the new conditions of soil formation and exploitation, created after radical transformations in Romanian agriculture, when most of the lands were passed from state to private ownership. The first comparative analysis of the properties of the soil that evolved on the terrains utilized for crop culture on farms and agrito...
Autori: Jenica Călina
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28128

The study considers meningococcemia which is one of the most severe form of meningococcal disease and represents a significant worldwide health problem. The occurrence of meningococcemia was investigated based on a case study developed in a Romanian hospital using data taken from the medical records of patients with the diagnosis of meningococcemia. The pathogen can produce a fulminant form of the disease that can lead to death within a few hours of onset. The signs and symptoms of meningococcem...
Autori: Carmen Manciuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28179

Clearly, the purpose of this paper is to find an answer to the following question “Is the ethanol additive more environmentally friendly for an SI engine or for a CI engine?”. The tests, therefore, were conducted on both an SI and a CI engine for the same parameters under both same conditions and laboratory. Ethanol was blended into neat diesel (D100) and neat gasoline (G100) at the same proportion (10 vol. %) and two blends were prepared in the study, namely D90E10 and G90E10, re...
Autori: Suat SarÄądemir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28190