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 ...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25167

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

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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25169

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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25206

Include urmatoarele articole:� Synthesis of Ferrierite/ZSM-35 type zeolite with ethylenediamine as template� Recovery of p-hydroxybenzoic acid from wastewaters by reactive extraction 1. Extraction mechanism and influencing factors� Relationships between metals extent and cytological characteristics at Prunus persica L. pollen� Smoke Emissions From Diesel Vehicles: A Case Study� Carbon dioxide generation - implications for romanian pulp and paper industry � Enhanced decolorization of ...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25208

AbstractThe aim of this work was to obtain Ag - doped zeolite as antibacterial material using natural and sodium form of zeolite from Mirsid Romania with the dimensions ranged between 0.8-1.2 mm. The comparative structural characterization of natural and Ag - doped zeolite were performed using Laser Induced Breakdown Spectroscopy (LIBS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and Infrared Spectroscopy (IR). In addition, the ion exchange total ...
Autori: Aurel Iovi, Corina Orha, Cornelia Ratiu, Florica Manea, Georgeta Burtica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25220

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

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

AbstractThe crystallization of ferrierite/ZSM-35 zeolite at 180 Âą 50C in the presence of ethylenediamine as a structure-directing agent from reaction mixtures containing various active NaOH/SiO2 ratios has been studied. X-ray diffraction, scanning electron microscopy, TG/DTG/DSC analysis, nitrogen sorption measurements and temperature-programmed ammonia desorption were used to characterize the ferrierite/ZSM-35 solids. The XRD data reveal that the samples synthesized in optimized conditions are...
Autori: Ioana Droahna, Iuliean Asaftei, Nicolae Bilba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25251

AbstractZeolites Cs+, Na+-chabazite with SiO2 /Al2O3 ratio of 7 were prepared from gels with molar composition (2.41-2.73)(Cs+ + Na+)2O : (0.02 TPAOH) : Al2O3 : 7.21 SiO2 : (194-204) H2O in static hydrothermal conditions at 108 – 132 0C for 8-21 days. The solids were characterized by X - ray diffraction, scanning electron microscopy, thermal analysis and nitrogen sorption measurements. The nitrogen sorption isotherms at -1960C present a hysteresis loop which is indicative for the existence of ...
Autori: Ionela Droahna, Iuliean Asaftei, Nicolae Bilba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25266

? 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 ...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25378

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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25371

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

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 Two types of zeolite-modified electrodes, e.g., Ag-doped zeolite-expanded graphite-epoxy (AgZEG) and Cu-doped zeoliteexpanded graphite-epoxy (CuZEG) composite electrodes were tested for the application of the electrochemical determination of 4-aminophenol (4-AP). The electrochemical techniques used for the electrochemical determination of 4-AP were cyclic voltammetry (CV) and chronoamperometry (CA). Some aspects related to the mechanistic behaviour are discussed. The electrochemical ...
Autori: Cornelia Ratiu, Carmen Lazau, Corina Orha, Ioan Grozescu, Aniela Pop, Daniela Sonea, Florica Manea, Georgeta Burtica, Joop Schoonman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25468

Abstract Certain conventional and alternative carbon-based electrodes, i.e., glassy carbon electrode (GCE) and, commercial boron-doped diamond electrode (BDDE) were investigated and compared for the electrochemical determination and degradation of 2,4-dinitrophenol (2,4-DNP). The electrochemical behavior of electrodes in the presence of target pollutants was investigated using cyclic voltammetry (CV), chronoamperometry (CA), and multiple-pulsed amperometry (MPA). The duality of the electrode ...
Autori: Adriana Bebeselea, Cristina Proca, Florica Manea, Ciprian Radovan, Georgeta Burtica, Joop Schoonman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25469

Abstract In order to improve the photo-efficiency of the electronic process as well as the response into the visible part of the spectrum, TiO2 doping with heavy metal (cadmium, cooper and nickel) have been employed. The objectives of this work are: (a) to prepare doped Me(Cd, Cu, Ni) TiO2 by doctor blade (DB) and spray pyrolysis deposition (SPD) techniques, (b) to characterize the catalysts, (c) to study and compare the activity of the Cd-TiO2, Cu-TiO2 and Ni-TiO2 catalysts on methyl orange ...
Autori: Luminita Andronic, Bianca Hristache, Alexandru Enesca, Anca Duta, Maria Visa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25480

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 Chlorophenols were selected for this study because most of them are toxic and difficult to biodegrade. They represent a particular group of priority toxic pollutants listed by the US EPA in the Clean Water Act and by the European Decision 2455/2001/EC. The efficiency of advanced oxidation processes for degradation of chlorophenols has been extensively documented. The catalytic wet hydrogen peroxide oxidation process, involving oxidation with H2O2 and solid catalysts in mild reaction ...
Autori: Brindusa Dragoi, , Cezar Catrinescu, Daniela Arsene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25601

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

? 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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25666

? 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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25669

Abstract:Hydrothermal synthesis was used to obtain nanostructured TiO2 based nanopowders. There were prepared pure and ZrO2 dopedcompositions consisting mainly of anatase phase with crystallite size up to 20 nm. The agglomerates of the as-synthesizedmaterials had dimensions ranging from a few hundreds nanometers to 200 microns. The investigations concerning the thermalbehavior revealed the presence of an exothermal effect at around 550oC which could indicate a possible phase transformation ofana...
Autori: Adrian Mihail Motoc, Anca Duta, Oana Raita, Radu Adrian Carcel, Radu Robert Piticescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25758

Abstact:0.5 - 2.0% CuO-doped ZnO (CuO-ZnO) photocatalysts were prepared with a simple mixing method where the oxides wereinitially synthesized through precipitation. The physico-chemical properties of CuO-doped ZnO photocatalysts were studied viaXRD, TEM, XRF and BET method and their photoactivity was evaluated by degrading methyl orange (MO) dye. The propertiesof ZnO were not affected by the addition of CuO except for the particle size of the photocatalyst, which increased proportionallywith Cu...
Autori: Abdul Halim Abdullah, Md. Jelas Haron, Nor Zafirah Razali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25785

Abstract:Alkaline protease from Conidiobolus coronatus which is optimally active at pH 10 and 40°C finds application in leather and detergent industries as well as for recovery of silver from waste photographic films. The protease was immobilized in Ca-alginate, polyacrylamide gel and alkali treated waste fungal biomass (ATWFB). ATWFB was found to be most suitable among the matrices tested. Glutaraldehyde marginally increased the binding to ATWFB. Binding of protease to ATWFB seems to be through...
Autori: Ryali Seeta Laxman, Shiv Shankar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25807

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

The aim of this study was to investigate photocatalytic activity of a silver doped TiO2 modified zeolite (Z-TiO2-Ag) in the photocatalytic degradation of Reactive Yellow 125 (RY 125) azo dye. The operational conditions using photocatalyst dose of 1g¡L-1 at pH 6 were established as optimal conditions for photocatalysis application in RY 125 dye solution degradation. The photocatalyst exhibited a good performance for discoloration at all studied concentrations (25, 50 and 100 mgL-1). A go...
Autori: Carmen Lazau, Elida Cristina Ilinoiu, Florica Manea, Liliana Andreea Colar, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25854

The composite materials based on natural zeolite and undoped and N-doped TiO2, i.e., Z-Na-TiO2 and Z-Na-TiO2-N, were successfully synthesized by solid-state reaction in microwave-assisted hydrothermal conditions. Undoped TiO2 and N-doped TiO2 nanocrystals were previously synthesized by sol-gel method. The X-rays diffraction results of TiO2 nanocrystals indicated that anatase TiO2 is the dominant crystalline type. The composite materials were structural and morphological characterized by X-ray di...
Autori: Cornelia Bandas (Ratiu), Carmen Lazau, Paula Sfirloaga, Florica Manea, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25911

The performances of two types of multi-walled carbon nanotubes-based composite electrodes, i.e., MWCNT-Epoxy (CNTEpoxy) and Natural Zeolite-modified- MWCNT- Epoxy (NZ-CNT-Epoxy) are described in order to use them for electroanalytical application. Both electrodes were synthesized, electrically and electrochemically characterized and tested for the detection of ascorbic acid (AA) in aqueous solutions. The electrochemical characterization using classical potassium ferricyanide method showed a high...
Autori: Adriana Remes, Anamaria Baciu, Elida Ilinoiu, Florica Manea, Joop Schoonman, Stephen J. Picken
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25877

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

The present study was carried out to highlight the areas where heavy metal content in the soils from Rodna mining perimeter exceeds normal limits and to attempt to reduce the concentration of free heavy metal ions by using natural zeolite from the Dej tuff. In order to emphasize the heavy metal content and their accumulation in soil in Rodna region, 35 soil samples were collected from the upper and deeper layer (about 0-10 and 10-20 cm depth) and analyzed to determine total and free Cu, Pb and Z...
Autori: Ramona Nimirciag
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25900

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

AbstractA comparative study regarding the shape, dimension and bactericidal activity of the undoped and Ag-doped TiO2 nanocrystalswas achieved. In this way, two hydrothermal methods, classical hydrothermal and microwave-assisted hydrothermal, was usedfor nanoparticles synthesis. The obtained materials were investigated by X-ray diffraction, DRUV-VIS spectroscopy, BET andSEM/EDX analysis. Antibacterial activity of undoped and Ag-doped TiO2 materials was tested on real water from Bega River.The be...
Autori: Carmen Lazau, Corina Misca, Corina Orha, Cornelia Bandas, Sorin Olariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26034

AbstractA study on the electrochemical decolourisation, aromatic ring degradation and mineralization of Reactive Red 147 (RR) syntheticsolutions using boron-doped diamond (BDD) electrodes is presented. Electrolyses were carried out under galvanostaticconditions in 0.1 M Na2SO4 supporting electrolyte using undivided electrolytic cell. Prior to electrolysis application, theelectrochemical behaviour of BDD electrode was characterized in the presence of RR dye by cyclic voltammetry in order toestabl...
Autori: Sorina Moţoc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26089

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

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

AbstractThe possible recovery of three microelements contained in the sludges resulted after chemical leaching of uranyl ions fromuranium ores was investigated, using four types of zeolites as adsorbents. The variation of the retention degree in time of 3cations: Fe3+, Ti4+ and Ni2+, adsorbed on: ETS-10, ETS-4, ZSM-5 and mordenite was followed. The characteristic adsorptionparameters connected to Langmuir and Freundlich isotherms were also determined. For a given adsorbent, the rate of globalret...
Autori: Alexandru Cecal, Dumitru Gânju, Maria Ignat, Nicoleta Melniciuc-Puica, Petrisor Mugurel Samoila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26327

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 this study, TiO2-zeolite modified carbon nanotubes-epoxy (TiO2-Z-CNT-Epoxy) and TiO2-zeolite modified carbon nanofibersepoxy(TiO2-Z-CNF-Epoxy) composite electrodes were applied for pentachlorophenol (PCP) degradation and determination inaqueous solution. The morpho-structural characterization of the composite electrodes was studied by scanning electronmicroscopy. The electrochemical behaviour of the electrodes was investigated under UV irradiation presence/absence, usingcyclic voltamm...
Autori: Ágnes Jakab
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26491

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

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

AbstractThe alkylation of light hydrocarbons leads to produce the high octane number gasoline blending components. The homogeneouscatalytic alkylation reaction is usually carried out at low temperature in the presence of H2SO4 and HF. The use of heterogeneouscatalysis for this reaction is a promising solution for the replacement of hazardous acids to environmentally friendly zeolitecatalyst. The alkylation reaction of isobutane with 1-butene was studied on selected zeolite catalysts. The objecti...
Autori: Tatjána Juzsakova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26514

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

AbstractCurrently, thermal insulation of buildings is required from both an energy savings perspective and a money savings perspective.Insulation is primarily installed on the outer surface of the buildings. Weather and other circumstances can produce humidity thatcan act on the building structure, e.g., by changing its heat capacity, the heat transfer coefficient and/or other factors. As a result,it is important to measure the sorption behaviors of the construction materials. To perform sorptio...
Autori: Ferenc Szodrai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26550

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

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

Abstract 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 comparative photocatalytic activities of undoped and N-doped TiO2 anatase nanocrystals towards the degradation of Reactive Yellow 125 (RY125) azo reactive dye in aqueous solutions under UV and VIS irradiation ranges were investigated. Both nanocrystals prepared by a fast-hydrothermal method using titanium isopropoxide as precursor were characterized morpho-structurally by X-ray diffraction, SEM/EDX analysis and BET measurements. Also, optical features of the nano...
Autori: Corina Orha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26757

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

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

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

The aim of the present study was to prepare environmentally friendly silver-based materials using Cornus mas L. fruits extract. For this purpose, silver nanoparticles (Cornus mas-AgNPs) were green synthesized using this plant extract. The bioreduction of silver ions was analyzed by UV–VIS and ATR-FTIR spectroscopic studies. Scanning Electron Microscopy (SEM) analysis revealed the formation of spherical phyto-nanosilver particles with size ranging between 12 and 40 nm. Different amounts ...
Autori: Ioana-Raluca Suica-Bunghez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27139

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

Reuse of grey water is an attractive option when available water supplies are limited, and can reduce demand on water supplies and provide additional water resource. This comparative research was conducted to assess the suitability and effects of reusing grey water, treated and untreated, as irrigation water for vegetables, compared with tap water. Tomato (Lycopersicon esculentum) and green bean (Phaseolus vulgaris) plants were selected as examples. The collected grey water samples were treated ...
Autori: Jehad Y. Al-Zou by
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27254

The remarkable photocatalytic properties of titanium dioxide and the high adsorption capacity of the mesoporous materials were combined to obtain active photocatalysts for the decomposition of Rhodamine 6G dye. The mesoporous TiO2 was obtained by the controlled hydrolysis-condensation of titanium isopropoxide, using hexadecyl-trimethyl-ammonium bromide as template, followed by calcination to remove the organic matter. Subsequently, this sample was doped with sodium wolframate and platinum. T...
Autori: Doina Lutic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27325

Pharmaceuticals contaminants in waters exhibit a significant threat on the human health and the ecosystem quality. This research demonstrates the utility of a silver-doped zeolite-modified carbon nanofiber-epoxy (AgZ-CNF) prepared by two-roll mill method in development of the fast methodology for the detection of fluoxetine (FXT) in the aqueous solution. The results showed the role of zeolite that improved the sensitivity and the limit of detection of FXT resulted to the possibility to propose a...
Autori: Magdalena Ardelean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27328

In order to investigate the degree of pollution by heavy metals, mining water samples were subjected to analysis, using inductively coupled plasma optical spectrometry method. An experimental module was developed and the water treatment capacity of natural zeolites was studied. The contaminated water was passed through 3 columns filled with zeolites, under static and dynamic mode in order to optimize the ion exchange process. Experiments were performed using different particle sizes of zeolite...
Autori: Andrei Szollosi-Moţa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27368

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

A low-cost magnetic zeolitic material was synthesized from coal fly ash by means of a new, simple method involving alkaline hydrothermal zeolitization of fly ash (FA) followed by low-intensity wet magnetic separation. Scanning electron microscopy with energy-dispersive X-ray analysis was applied to characterize the composition, microstructure, and morphology of the material. The mineral and synthetic zeolite phases were identified by powder X-ray diffraction. The obtained magnetic zeolitic m...
Autori: Annie Shoumkova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27486

This study aims to obtain high performance cement under friendly environmental conditions, through the optimization of clinkerization process. The influence exerted by mineralizers i.e. fluoride (NaF, KF) or oxide (CuO, TiO2) on the Portland clinker characteristics and derived cement properties is presented in this experimental study. The presence of these additions in low concentration (i.e. 0.5-0.8 wt. %) permits the reduction of the burning temperature (with 20oC up to 70oC) of raw mix and mo...
Autori: Jenica Paceagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27500

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

Chemical oxidation of pyrite and chalcopyrite by ferric sulfate (Fe2(SO4)3) solution and biogenic ferric iron obtained by mixed culture of isolated thermotolerant Acidithiobacillus sp. 13Zn and Leptospirilum ferriphilum CC immobilized on natural carriers- zeolite and shungite was studied. Oxidation rate of sulfide minerals was estimated by the decrease of Fe3+ (oxidant) and increase of Fe2+ ions in the solution. It was revealed that chemical oxidation of chalcopyrite by biogenic ferric iron occu...
Autori: Arevik Vardanyan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27563

A simple and efficient method for preparing Ag-doped TiO2 nanoparticles was successfully developed, by associating the sol-gel method and the impregnation-reduction. While titanium dioxide is one of the most used solids as photocatalyst, silver is particularly interesting for applications in biological and chemical detection and for its antibacterial properties. Moreover, in photocatalysis silver acts as an electron sink and donor in capturing the photogenerated electrons. The structural and mor...
Autori: Catalina Nutescu Duduman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27566

In this study, Ag/TiO2–P25 nanoparticles prepared via photodeposition method and its textural properties were characterized using X–ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The cements modified with TiO2–P25 and Ag/TiO2–P25 nanoparticles were immobilized on tile plates, and their photocatalytic activity was evaluated versus the removal of Erioglaucine as the model o...
Autori: Mohammad A. Behnajady
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27589

The main topic of this study is the photo-optical and electrochemical behavior of a series of fluorinated copolyimides containing both oxadiazole and perylene moieties in the main chain. The polymers prove a strong photo-optical stability on a large temperature domain and display different types of photoluminescent behavior in solution and in solid state, with emission maxima in the bluish and green–yellow domains. Cyclic voltammetry investigations suggest that the polymers can be easil...
Autori: Radu-Dan Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27883

In this study, Mg-doped ZnO nanoparticles with 2% Mg content were synthesized by sol-gel method. The structure and morphology of the nanoparticles were characterized by TEM, BET and UV-Vis absorbance techniques. From TEM image, it was found out that the nanoparticles had uniform size and uniform distribution. BET analysis revealed that in comparison with pure ZnO, Mg 2%/ZnO nanoparticles had a higher specific surface area. Based on UV-Vis absorbance analysis, Mg 2%/ZnO nanoparticles shifted t...
Autori: Nahide Zarei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27909

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

Synthesis of silver nanoparticles (AgNPs) by plants is a simple, non-toxic and eco-friendly method. The purpose of this study was to develop a method for obtaining silver nanoparticles with biological properties. For reducing the silver ions, an extract of Tilia cordata (linden) flowers was used. Some parameters were investigated to optimize the synthesis method. Thus, the conditions of reaction were varied, such as pH, concentration of silver salt, different ratio of plant extract and silver sa...
Autori: Andreia Corciova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27977

Clinoptilolite (Clin), the most widely used natural zeolite in environmental applications, was used as soil additive to investigate its effectiveness in protecting and improving the quality of soils that received surface disposal of OMW, as well as in limiting nutrients leaching from the degraded soils. Clin was added in a batch experiment of 18 months, where OMW were added in evaporation ponds and on soil for a period of more than 12 years. The zeolite was added as dust (particle diameter &l...
Autori: Maria K. Doula
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28018

NaA zeolite was successfully synthesised from fly ash through hydrothermal process. The synthesised NaA zeolite was modified with Li+, Ca2+ and Mg2+ through ion exchange at a temperature of 60 °C and contact times of 1 h and 4 h. In this study the crystallinity of the synthesised NaA as well as its modified (LiA, CaA and MgA) was evaluated towards CO2 adsorption capacity using temperature programmed desorption (TPD) process at low temperature (40-150°C) and high temperature (150-700°...
Autori: Muvumbu Jean-Luc Mukaba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28175

Copper and Zinc co-doped titania nano photocatalyst (Cu-Zn-TiO2 NPC) was fabricated and characterized using room temperature X-ray diffraction (XRD), field emission electron microscopy (FESEM) with high-resolution transmission electron microscopy (HRTEM) and energy dispersion X-ray (EDX). X-ray diffraction studies of the Cu2+-Zn2+/TiO2 show the presence of anatase phase TiO2 and in the sample prepared from 0.05, 0.10, 0.15 and 0.20 mmol have also shown the presence of anatase phase only. The ph...
Autori: Tentu Nageswara Rao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28198

Pollution with aromatic hydrocarbon has been rising because of the extreme usage of benzene containing compounds. Most of the people, animals and plants have been exposed to aromatic hydrocarbons due to polluted water sources. The aim of the present work was to carry out an experimental study for the photocatalytic degradation of aromatic hydrocarbon containing compounds by irontitanium- pillared interlayered clays (Fe-Ti-PILCs) and copper-titanium-pillared interlayered clays (Cu-Ti-PILCs). For ...
Autori: Beytullah Eren
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28249

Zinc oxide and strontium doped zinc oxide nanoparticles were synthesized through hydrothermal route. The synthesized nanoparticles were characterized by UV, FTIR, SEM, X-Ray diffraction (XRD) and energy dispersive x-ray (EDX) spectroscopic techniques. The optical band gaps were calculated to be 3.16EV and 2.90EV for ZnO and Sr-ZnO nanoparticles, respectively. FTIR confirmed the incorporation of the Sr into ZnO nanoparticles. Average particles size of undoped ZnO and Sr-doped ZnO nanoparticles wa...
Autori: Fazal Akbar Jan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28323

The present study describes the facile synthesis of silver nanoparticles (AgNPs) by green method using aqueous extract of Gazania rigens. The size, morphological, compositional and optical properties of silver nanoparticles were examined through X-ray diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), Scanning Electron Microscope (SEM), and UV-Vis spectroscopy respectively. Ultraviolet-Visible spectra showed the absorbance band between 425–460 nm which indicated the synthesis o...
Autori: Tayyaba Shahzadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28349