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

Contain all the articles from this issue Risk assessment and management - tools for sustainable developmentMaria GavrilescuSustainable alternatives for petrochemical wastewater managementCarmen Teodosiu, Lidy E. Fratila-ApachiteiThe role and the place of oxidant reagents in wastewater treatmentIoan RoscaEnvironmental Psychology, a new direction in the psychological fieldCarmen Catalina IoanChanging concepts of high performance to socially sustainable organizationCostache Rusu, Nerida DavisU...
Autori: Abdelnaser Omran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25166

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

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

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

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

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

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

? 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

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 Protection of plants from diseases, pests and weeds plays a decisive role in agricultural development, as an essential part in planning and policy of numerous countries. Since the plant protection products are mainly chemicals and may be not only poisonous for humans and fauna, but they may also pollute water bodies, ground water and soil with hazardous pollutants, their use have to be environmentally friendly and sustainable. The paper discuss some aspects of benefits and risks con...
Autori: Manuela Olga Pogăcean, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25405

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 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 Wood has been used as an engineering material because it is low in cost, renewable and strong and it requires low processing energy. Wood has many excellent properties that result from its exceptional combination of microstructural, ultrastructural and molecular features. The main drawback is its dimensional instability in the presence of moisture, which can affects also the biological stability. Wood is susceptible to degradation in a number of ways, including rot or decay, insect a...
Autori: Lucia Dumitrescu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25473

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 The paper presents the surfactant-assisted solvo-thermal route to synthesize nanoparticles of cerium oxide with different shape and morphology. The precursor was calcined at 400°C for 4 h in order to obtain CeO2 nanoparticles. The obtained samples were characterized by means of thermal analysis and FTIR spectroscopy. The UV-Vis analysis was used to study the optical properties. The morphologies and nano-structures were characterized by scanning electron microscopy (SEM) and XRD. It...
Autori: Nicolae Apostolescu, Gabriela Carja, Gabriela Apostolescu, Elena Husanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25541

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

Abstract In the last decades there has been a rapid evolution of techniques for production of bleached pulp. Much of these processes have been environmentally driven. New techniques have been developed in order to replace chlorine-based reagents in producing bleached pulp. Reducing the environmental impact of pulp production can be attain by using non-pollutant bleaching reagents like oxygen and related compounds. This paper deals with present findings and general trends in environmentally-s...
Autori: Adrian Catalin Puitel, Alexandru Botar, Dan Gavrilescu, Gheorghe Dutuc, Grigore Craciun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25592

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 In the study, the accumulation of secondary metabolites present in Calendula officinalis L. flowers with importance in therapeutics was examined, after the treatment with some substances considered being mutagens. The effect of substances appliedat different concentrations and different times of action was studied, qualitatively and quantitatively, considering various methanol extracts, obtained from the inflorescenses of Calendula officinalis L, which contained polyphenolic fraction...
Autori: Brindusa Robu, Constantin Leonte, Elvira Gile, Roxana Vatavu, Teodor Robu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25598

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: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

Abstract:The aim of this work is to obtain sintered porous membranes with graded structure for microfiltration by sedimentation andsintering of metallic powders. Our previous studies have demonstrated the possibility of obtaining sintered porous materials withgraded structure by sedimentation. In this paper, spherical nickel particles were used having a grain size in the 2-90 Âľm rangemeasured by the laser scattering particle size analyzer. The powders were sedimented into a sintering die in a s...
Autori: Gyorgy Thalmaier, Ioan Vida-Simiti, Nicolaie Jumate, Niculina Sechel, Valentin Moldovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25775

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, the effect of the ultraviolet light on various pathogen microbial strains present in drinkable groundwater samples (wells) from Constanţa County, Romania (localities Moviliţa, Topraisar, M. Kogălniceanu) was analyzed. The investigations were conducted in an original UV-C irradiation prototype installation for water samples. The efficiency of this prototype in destroying the pathogen agents present in drinkable groundwater was established by monitoring the p...
Autori: Bogdan Negreanu-Pîrjol, Elena Gorun, Remus Zăgan, Sabina Zăgan, Ticuţa Negreanu-Pîrjol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25802

The most important argument of this experiment was to demonstrate an increased content of active principles under the influence of some substances (considered in the literature as mutagene), when used in low concentration, do not affect the environment. The purpose of this study was the selection of some treatment variants, which, during the experimentations show the same biosynthetic potential, stabilized or increased. The substances used in the experiment were ethidium bromide at the concentra...
Autori: Constantin Leonte, Marius Zaharia, Roxana Vatavu, Teodor Robu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25867

This paper describes the scientific framework established within doctoral and postdoctoral programs designed to contribute to a thorough understanding of the specific processes involved in environmental engineering and protection, as to improve the environmental management and performance in an efficient and sustainable way. A coherent conceptual framework is developed for the analysis and management of some specific approaches in engineering and environmental protection (pollution phenomena, de...
Autori: Cristina Ghinea, Daniela Tudorache Fertu, Isabela Maria Simion, Laura Carmen Apostol, Mădălina Petraru, Maria Emiliana Fortuna, Maria Gavrilescu, Petronela Cozma, Raluca Maria Hlihor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25891

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

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

AbstractCurrently one can witness a revolutionary change in teaching/learning strategies and an evolution which should reconsider therelation between educational institutions, teaching staff, and students, on the one hand, and economic agents, public or privatecompanies, firms, and NGOs, on the other. Despite the large amount of research focusing on the entrepreneurial phenomenon,there has been limited focus on the effect of education upon enterprise performance in terms of venture creation and ...
Autori: Gabriela Boldureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26204

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

AbstractIn this study, as part of developing a green recycling process of spent lead-acid battery that can avoid both smelting and electrowinning, leaching agent citric acid and other additives (such as sodium citrate and hydrogen peroxide) in aqueous media were reacted with spent lead-acid battery paste. PbO, PbO2 and PbSO4, which are the three main components in a spent lead-acid battery paste, were leached to form lead citrate precursor which was crystallized and then separated from the solut...
Autori: Xinfeng Zhu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26215

AbstractThe washing method for uranium contaminated soils using three different reagents was investigated. Experimental data havebeen obtained for four types of soils, which have been characterized in terms of particle size distribution, as well as structure andchemical composition. Thus, the decontamination degree for each type of soil and reagent respectively has been measured.Subsequently, the decontamination process has been simulated using an artificial neural network. Based on this neural ...
Autori: Alexandru Woinaroschy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26451

AbstractA pot experiment was conducted to evaluate the growth and metal accumulation in water spinach (Ipomoea aquatica) establishedon a 30-year old active firing range soil amended with chicken manure (CM) and coconut tree sawdust (CTS) at application ratesof 0%, 1% and 3% (w/w). Both amendments increased biomass yield and reduced plant metal uptake. The bioconcentrationfactor (BCF) and transportation factor (TF) values of the metals were in the order of Zn > Cu > Pb. The ammonium acetate...
Autori: Azlan Kamari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26499

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

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 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 Biochar derived from agricultural biomass waste is increasingly recognized as multifunctional material for various applications according its characteristics. It is therefore essential to investigate biochar properties before large-scale application. In this study, rice straw-derived biochars produced at different temperature (550, 650, 750 oC). The resulting biochars were subjected to liquidphase oxidation by different agents including KOH, HNO3, H2SO4, H2O2 and KMnO4 to obtain bio...
Autori: Sobhy M. Yakout
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26661

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

Abstract Particle size distribution is one of the most influential factors of most soil physical and even some soil chemical characteristics. As modern measurement techniques are being introduced, the need for comparing new methods with older methodologies arises because comparability means data continuity. Here, three institutes conducted a comparison of particle size measurement among the laser, areometer and pipette techniques. The purpose of the comparison was to a) discover any differen...
Autori: Csaba Centeri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26733

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 Drinking of arsenic contaminated waters has been reported adversely affect our health even at a concentration level as low as 10 g/L, therefore the availability of a reliable and cheap, and an environmentally arsenic detection kit is really indispensable. Although simple field test kits have been developed, most of them use toxic mercuric salt as a color-generating reagent for arsenic detection. Hence this study was conducted to develop a simple, cost effective, and environm...
Autori: Keat Khim Ong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26819

Abstract The aim of this paper is to assess the chemical and mineralogical composition and the leaching behavior of the electric arc furnace slags (EAFS) in order to improve their management by identifying suitable reuse options in different fields. The chemical and mineralogical composition of slag varies from one type of steel to another, from one technological stage to another and from one steel plant to another. In order to minimize the slag quantities disposed in the slag dumps one has ...
Autori: Dana-Adriana Iluţiu-Varvara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26835

As the serious effect of climate change and global warming is recognized, nitrous oxide (N2O) emission during wastewater treatment is receiving lots of attention due to its high potential to greenhouse effect. In this study, nitrifiers were acclimated in sequencing batch reactors with influent ammonium nitrogen (NH4-N) concentrations of 60 mg/L (SBR60) and 180 mg/L (SBR180), respectively. Nitrous oxide emission during nitrification was examined in both typical cycles and batch experiments. T...
Autori: Enge Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26926

In the context of sustainable development, focus must be set on reasonable use of natural and energetic resources, which is a real must at present. Besides these, material and informational resources add up to give the full picture of sustainable development resources. The paper introduces a valid solution of powdery waste recycling into pellets for the steelmaking industry. The pellets are obtained from powdery wastes (steel plant dust, red sludge, lime dust, dolomite waste, waste limestone,...
Autori: Ana Virgina Socalici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26944

To explore the main sources and pathways of heavy metals entering fruits and the corresponding countermeasures, a field survey was conducted in Pujiang County, Zhejiang Province, China. The results showed that heavy metals in fruits came mainly from the use of foliar fertilizers, ripening agents, fungicides, pesticides, and other sprayed materials during the flowering and ripening stages. Therefore, a government program should be established to improve monitoring of agricultural products ente...
Autori: Bin Fang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26955

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

The release of nitrogen compounds into the environment is a major concern worldwide. Different studies howed that recycled materials have a high removal capacity for pollutants. Bentonite and its major clay minerals, smectites clays are common bleaching agents used for oil refinery bleaching and known as bleaching earth (BE). In this study regeneration of spent bleaching earth (SBE) acquired from the vegetable oil industry was surveyed via different methods and the regenerated spent bleaching...
Autori: Mohammad Malakootian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27000

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

Over the past three decades, nickel–titanium engine-driven files have become instruments “sine qua non” for root canal treatment. They are increasingly used by dentists to facilitate the cleaning and shaping of root canals, during the mechanical treatment phase in endodontic therapy, increasing not only the speed of the treatment but also assuring a proper shape of the canal preparation. During the repeated use of these instruments, separation of the file occurs. It has been...
Autori: Teodora Stefanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27024

Air quality became a concern of highest priority in cities and town agglomerations, worldwide. Professional environmental monitoring strategies are prerequisites for supplying appropriate programmes destined to maintain air quality. Due to their capacity of bioaccumulation, tree species may be used as biomonitoring agents within programmes of monitoring air quality in urban spaces. The present study aims to emphasize the ability of A. hippocastanum L., and T. cordata Mill. leaves to be used a...
Autori: Ilie Covrig
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27026

Hospitality is the main industry in the service sector in Spain, contributing to more than 10% of the gross domestic product and approximately 12% of all employees. Firms in this industry are beginning to adopt eco-innovations to reduce their environmental impact and optimize the use of natural resources. However, most companies do not have the necessary resources to tackle ecoinnovation on their own and need to cooperate with different agents. The purpose of this paper is to examine how open...
Autori: Francisco José Sáez-Martínez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27073

This work focuses on treatment of lead polluted waste glass from urban collection (Pb≈5% wt) for its valorization as support in the immobilization of lipase, because soda-lime glasses are used in enzymatic catalysis. First of all, an extraction process of surface Pb was performed. The process is based on nitrilotriacetic acid (NTA) chelating agent. The operating conditions are: T=80°C, t=1h, pH 10, solid/liquid weight ratio=1/10, reagent concentration=0.1 M. Leaching tests at contr...
Autori: Luisa Barbieri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27122

Nowadays environmental protection has become a valuable asset for the entire society. The information based society can provide more efficient solutions in its risks mitigation. There are already in place complex infrastructures used to monitor and control the natural environment, but most of them have lower or no interdependency. A solution to gain this integration level is represented by the “smart cities” concept. This study will present an approach used to integrate almost eve...
Autori: Mihai Horia Zaharia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27164

An electro-Fenton process was carried out using undivided cell containing tridimensional graphite felt cathode for treatment of real textile wastewater. The study is essentially focused on effects of pH, applied current and transition metal types (Fe2+ and Cu2+) as catalysts on the electrochemical degradation efficiency based on color and COD removal and BOD5/COD value. The results indicated that pH 3 and applied current of 150 mA are the optimum conditions for decolorization and COD removal of ...
Autori: Akbar Eslami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27167

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

This study presents the results obtained in tailoring thin films of alumina, deposited onto aluminium substrates by spray pyrolysis, at 250°C, using AlCl3 solutions (0.15M) in a water:ethanol (1:1) solvent mixture. As morphology controlling agents, acetylacetone and maleic acid based copolymers are added in the precursors’ solutions. The precursors’ systems are analyzed by FTIR spectroscopy and the surface morphology of alumina thin films is investigated by atomic force microscop...
Autori: Luminita Isac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27291

Deforestation is a vital problem at global level, being one of the main causes of climate change. Volume of wood used in construction, furniture and pulp and paper industries increases year by year. Stopping the decrease of forests surface is of imperative importance from the point of view of sustainability. Pulp and paper industry faces with severe lack of pulpwood and for this reason other raw materials are taken into consideration. Chemical pulp can be partially replaced with recovered paper ...
Autori: Adrian Cătălin Puiţel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27348

In this pilot study, exposure to airborne microorganisms in solid recovered fuel (SRF) plants has been measured. Different steps in SRF production processes such as separation and size reduction can cause generation of airborne microorganisms. Exposure to these biological agents can cause some health problems, so their levels should be measured to assess the potential risks. Therefore, exposure to airborne total bacteria, Gram-negative bacteria, actinomycetes and fungi were measured in the runn...
Autori: Şenol Yildiz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27373

Chemical precipitation is an effective and relatively low cost method for removal of heavy metals. The removal of lead ions from wastewater by a precipitation process was investigated using sodium sulfide and sodium carbonate. Precipitation experiments were performed using storage battery wastewater with lead concentration of 8.8 mg/L and synthetic wastewater with different lead concentration ranging from 5 to 600 mg/L. A series of experiments (each concentration) were carried out under differen...
Autori: Mehraban Sadeghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27388

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

This study was conducted to evaluate the cyanide removal efficiency by coupled process of Fenton and coagulation/precipitation from aqueous solution. The study was performed at laboratory scale in a batch system. Variations of pH, Fenton and precipitation reagents (molar ratios of Fe2+/H2O2 and ferric chloride), contact time and initial concentration of cyanide were investigated, and the optimum conditions obtained from each of the Fenton and precipitation processes were followed in the coupl...
Autori: Ahmad Jonidi Jafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27426

The partial nitrification bioreactor (PNBR) was operated at a constant temperature and an influent synthetic wastewater pH of 35°C and 8.5, respectively. The effects of dissolved oxygen concentrations (DO), hydraulic retention times (HRT), and the nitrogen loading rates (NLR) on the ammonium removal efficiencies and the NO2-N/NOx-N ratio were investigated. The activity of nitrite oxidizing bacteria was stimulated at high DO concentrations. The highest NO2-N/NOx-N ratio of 0.76 was obtained a...
Autori: Sukru Aslan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27455

This study undertakes to characterize through thermal analysis in dynamic conditions a wide range of building materials used for various types of insulation and presents for the first time a comparative analysis of their thermal stability. To this effect, the dynamic thermal analysis TG/DTG was applied. The results show a degradation resulting in one, two or three stages after a complex mechanism, with different mass loss, depending on the structure and atmosphere in which the thermal decomposit...
Autori: Andreea-Camelia Sprânceană
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27514

Recently, the studies about vitamin B12 increased due to the high number of people who can develop vitamin B12 deficiency, namely: vegetarians, pregnant women or with vitamin B12 malabsorption. One solution to correct the low nutritional intake of vitamin B12 can be using food supplements or pharmaceuticals, based on the vitamin B12 microencapsulation. In the present research, the vitamin B12 microencapsulation and the controlled release of fresh and 4 months’ storage samples of vitamin B1...
Autori: Ioana C. Carlan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27559

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

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

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

This study was conducted on samples taken from the “Fagul Cetății – Iazul nr. 4” tailings pond in the Eastern Carpathians, Romania and is focused on exploring the way in which heavy metals from sulphide rich material are spatially distributed in relation to the geochemical conditions. For comparison, concentrated ore samples from the same area, genetically linked to the Tulgheș lithogroup were also analysed. The mineralogical and chemical composition of the sampl...
Autori: Sorin-Ionuț Balaban
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27626

The Silicon wafer plays an important role in modern electronic products. During the production of Silicon wafer, a large amount of scrap Silicon wafer is generated. The necessity for it to be recycled and recovered is of vast importance since the metal Silicon (Si) is the major by product. Besides Silicon, the wafers also contain a small quantity of Copper (Cu) and Aluminum (Al), that are considered as minor elements during the recovery process of the Silicon wafer production. Therefore, in o...
Autori: Ching-Hwa Lee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27660

One of the main causes of global climate change is deforestation. Wood is largely used in construction, furniture, and pulp and paper industries, which consume hundred of millions of cubic meter of wood year by year. Forest surfaces decrease rapidly at global level and this reality is of crucial importance for world global ecological footprint. Shortage of pulpwood for paper industry became a great challenge and, for this reason, other raw materials must be taken into consideration. Recovered pa...
Autori: Ana Maria Cheșcă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27703

There has been an increasingly awareness over the environmental impact of human activities, along with the exponential industrial growth, over the last decades. One of the negative important issues is the air pollution and its impact over the human health in recent years. Therefore, there have been initiated several laws and projects in order to monitor, analyze and forecast the evolution of the most important air pollutants. In this paper, it have been designed a multi agent system based mod...
Autori: Elia Georgiana Dragomir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27888

Databases on the exposure of workers to dangerous chemical agents are an important tool for assessing and managing chemical risk but also for recognizing occupational diseases caused by exposure to hazardous chemicals. Both the European Union (EU) authorities and European trade unions have recognized the need for some databases containing as much information as possible on the type and timing of exposure of workers to dangerous chemical agents. In Europe there are only a few databases for che...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27954

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

A simultaneous hierarchical classification of groundwater in the Banat Plain-southwestern Romania and associated characteristics such as As(III), As(V), total As, trace metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn), pH and redox potential using Fuzzy Hierarchical Cross Clustering Algorithm was carried out. In samples containing more than 10 μg/Ltotal As (13.9 – 77.3 μg/L), the As(V) species represented 57±20% and 73±18% in the others. Arsenic speciation pattern was in agr...
Autori: Marin Senila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28059

Proteins from Hermetia illucens (or Black Soldier Fly, BSF) have been employed in this study as possible source for bioplastic formulation. This type of bioplastic can replace the actual materials employed in agriculture, avoiding the critical issues concerning the soil pollution due to conventional plastic end-life. Different plasticizing agents (glycerol and polyethylene glycol) have been tested and the ability to generate a homogenous film, through wet casting, has been evaluated. Characteriz...
Autori: Silvia Barbi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28074

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

Molybdate anions are used in a lot of fields and represent an essential trace element for plant and animal life; however, excessive amounts can cause adverse effect on various organism and environment. Therefore, in the present paper the adsorption performance of MgnFe- layered double hydroxides in the removal process of molybdate from aqueous solutions was studied. The layered double hydroxide (LDH) was synthesized by co-precipitation at low oversaturation method. Different ratio between Mg and...
Autori: Alin Golban
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28152

This work seeks to develop a suitable heavy metals precipitation modeling approach that could give reasonable results in mainstream use with industrial wastewater treatment. This paper is devoted to the thermodynamic analysis of the degree of precipitation of slightly soluble hydroxides and salts in industrial wastewaters in order to optimize the technological schemes of extraction and reuse of heavy metals from industrial waste. Based on the notion of the solubility product, the equations desc...
Autori: Igor Povar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28156

The study is focused on creating magnetic mesoporous materials through the insertion of a nickel ferrite into the structure of kaolintype clay. Sol-gel auto-combustion method was employed to synthesize the materials, using glycine and tartaric acid as chelating/combustion agents. This is the first study on the combined effect of different fuel agents and of clay-to-ferrite molar ratio on the structural, textural, magnetic and adsorptive properties of nanocomposites. The value of the average por...
Autori: Stefana Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28210

In this article, issues of environmental pollution due to long-range atmospheric transport of heavy metals are considered. Researches of recent sediment cores of Lakes Liunkunlampi and Raivattalanlampi from the Republic of Karelia were carried out. The purpose of the study was to give a detailed environmental and geochemical assessment of the recent sediments in these small lakes located in the southwestern part of Karelia. The scope of the study covers the area of the southwest of Karelia (Russ...
Autori: Zakhar Slukovskii
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28229

Oil-based drilling fluids are widely used in oil and gas exploration and development. Large amounts of oily drilling cuttings are produced in the drilling process, and improper treatment can cause serious secondary pollution. Chemical cleaning is commonly used to treat oily drilling cuttings. However, most degreasing agents are not environmentally friendly and can cause secondary pollution. Thus, the processing requirements of oily cuttings are difficult to meet. In this study, an environmental...
Autori: Zhiyong Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28313

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