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

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

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

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

AbstractConsidering that three-phase dispersions are common in chemical engineering and biotechnology, and with increasing airlift reactor applications to chemical and biotechnological processes, a experimental study was undertaken in order to investigate the liquid phase hydrodynamics and dispersion in an external-loop airlift reactor on laboratory scale. Experiments were conducted in order to find a relationship between relevant hydrodynamic and mixing parameters of a solidsuspended exter...
Autori: Florina Ungureanu, Maria Gavrilescu, Radu Z. Tudose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25268

AbstractThe aim of this work was to study the content of Fe, Mn, Zn and Pb in the mixtures which contain volatile oil between othercomponents, obtained after the Soxhlet extraction or maceration of the samples (different organs of garden flowers - blue hyacinthand chrysanthemum). The blue hyacinth is a bulbous perennial herb in the Lilliaceae family, grown for its showy and fragrantspringtime flower display. Garden chrysanthemums are tender perennials in the Asteraceae family in double-flowered ...
Autori: , Simona Dobrinas, Viorica Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25294

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

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

AbstractAt global level, the microbiological quality of water is a matter of concern, since diarrhoea represents the second cause of mortality. In addition, nitrates represent a significant problem and their high concentration - above the accepted limits - in drinking water is frequently encountered in Romania. Water samples have been analyzed in accordance with the methodology recommended by The Public Health Institute Bucharest. 78.15% of the water samples evaluated during the interval 2004-20...
Autori: Claudia Sarmasan, Lucia Daina, Sonia Draghici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25325

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

Abstract Fine particulate matter and ground-level ozone are now generally recognized as the most significant in terms of health impacts. This study shows that concentrations of particulate matter up to 10 microns in diameter (PM10) in Suceava city exceeded EU limits set to protect human health during 2004-2007. In order to design effective PM10 air quality management programmes, it is essential to identify the sources affecting PM10 background levels. For this, PM10 data series were analyzed ...
Autori: Lacramioara Gina Ursul, , Doina Carmen Manciuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25409

Abstract This paper aims to propose a new solution for rational valorization of the secondary powder materials from steel makingin electric arc furnaces. The elaborated steel quality as well as the economical advantages represented by secondary powdermaterials recirculation were studied. A good correlation between the proportion of brickets loaded into the melt and the melting ofcarbon has been found. The proportion of the EAF dust brickets can grow even at 5-7%. Zinc presence could havenegat...
Autori: Mirela Gabriela Sohaciu, Avram Nicolae, Cristian Predescu, Stefan Velicu, Gheorghe Gh. Calea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25438

Abstract Economical development in the Arges district, in the recent years, presents some aspects regarding the compliance with noise environmental regulations. The noise and its impact on human health is one of the most important objectives of the health assurance policy. In this paper a comparative study of urban noise in the principal cities of the Arges district is performed. The data monitoring of noise polution were carried out by using of specific standard methods with a Sonometer Delt...
Autori: Ion Iosub, Silvia Iosub, Victor Grigorie, Aurelia Meghea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25463

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

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

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

Abstract This paper applies a fuzzy method for the estimation of the daily electrical energy consumption of the fresh water hydrophore stations of a water distribution system. Based on the uncertainties of the water distribution system, the fuzzy logic was used to simulate a correlation between water and electrical energy quantities. Thus, the proposed method is proven as a useful tool for estimation of the daily electrical energy consumption considering the flow and the pressure growth of th...
Autori: Gheorghe Grigoras, Marcel Istrate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25607

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

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

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

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

For a better evaluation of the impact of road traffic about air quality, this paper considers the development of a new evaluation index system and methods. They address the assessment of the air quality around the areas with an intense road traffic, according to Chinese standards considering sulfur dioxide index (SO2), total suspended particles index (TSP), floating dust index (PM10), nitrogen oxides index (NOX) and carbon monoxide index (CO). A systematic air quality evaluation model was establ...
Autori: Zhao-hui Liu, Zhi-bin Qinhttp://www.ecozone.ro/reviste.php?RID=25714

Chemical composition data of coalbed produced water can provide information to determine the water sources, understand the evolution, select appropriate treatment processes and increase the utilization efficiency of water resources. Based on methods of hydrogeology, water chemistry and environmental chemistry, the characters of coalbed produced water in the Powder River Basin in the USA and Qinshui Basin in China have been analyzed. Conclusions have been drawn as follows: (1) The coalbed produce...
Autori: Guang Xu, Li Tong, Mei Yang, Yi-wen Juhttp://www.ecozone.ro/reviste.php?RID=25715

Abstract:The paper presents the virtual prototype of a robotic system for spray pyrolysis deposition (SPD). To design of the mechanicaldevice model of the robotic system, the MBS environment ADAMS of MSC Software was used, while the MATLAB/Simulink ofMathworks was used for the dynamic analysis of the robotic system, according to the mechatronic concept. A control loop waschosen, composed by a multi-body mechanical model, connected to the dynamic model of each motor. The main objective is toverif...
Autori: Cătălin Alexandru, Monica Enescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25744

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

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

This paper links two theoretical constructs underpinned by sustainable values, management of sustainable development and ecoinnovation. The first one becomes a crucial process and adds competitive value and, the second, plays a pivotal role in the search for a sustainable economy and society. This research is an attempt to explore the Spanish companies´ attitude towards sustainability when innovating. Industries were categorized as to their actual technological performance status as low, medium...
Autori: Ángel Peiró-Signes, Luis Miret-Pastor, María-del-Val Segarra-Ońa, Rohit Verma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25826

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

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

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

Since the last century, as a consequence of advanced industrialization, the remarkable growth of population, and its mobility have turned the field of transport into the main factor responsible for air pollution attributable to mobile sources of pollution. The continuous accumulation of various pollutants in the environment determines severe consequences on humans, animals and plants, buildings, works of art and landscape. Road transport represents, through its characteristic features – high f...
Autori: Gabriela Mitran, Ion Tabacu, Sorin Ilie, Viorel Nicolae
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25898

Five new aryloxyalkylcarboxylic acid derivatives (diazoaminoderivatives) are studied for their thermal behavior by applying a coupled TG-FTIR technique over the (30-400 oC) range in correlation with the environmental impact of gaseous species resulting by thermal degradation. These compounds are of a particular practical significance since they show a high biological potential as agrochemicals, such as pesticides (herbicides, acaricides, fungicides, growing stimulators etc.). This is why the pap...
Autori: Anca Mihaela Mocanu, Carmen Zaharia, Constantin Iordache, Constantin Luca, Lucia Odochian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25899

“The Exploratory Workshop „Progress inEnvironmental Engineering, Biotechnology andManagement in The Frame of Knowledge-BasedSustainable Economy” took place in the contextwhen worldwide research shows that the currentindustrial system supports a population that useresources and generates waste, consuming the Earth'ssupply, but who’s biocapacity is far outweighed bythe increased demand of products for a developmentsystem that often works on unsustainable bases.Today’s challenge is the integration ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25969

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

AbstractThe stability of soil aggregates is an indicator of soil structure. Soil acidity affects soil structure stability. Soil acidity has twocomponents: active acidity and exchangeable acidity. In natural conditions, each soil type has a certain level of acidity, which isgiven by its composition, natural vegetation, the chemical composition of precipitations and other factors that cause changes overtime in soil pH. Acidic soils are characterized by physical, chemical and biological properties ...
Autori: Dorin Cotiusca Zauca, , Lucian Vasile Pavel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26064

AbstractThis paper is an analysis of a case study which entails the assessment of pollution degree with nitrate in the Prut river basin, byanalysing 23 wells. The novelty of this work is the use of modeling done by GIS techniques, namely the Digital Terrain Model(DTM) interpolation technique, to obtain further information starting from discrete information.In the present paper, we emphasized the increasing tendency of nitrates and nitrites content in the underground waters, in directcorrelation ...
Autori: Florian Statescu, Gabriela Biali, Lucian Vasile Pavel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26073

AbstractWith the development of transportation systems, the associated traffic noise problem has drawn more and more attention in HongKong. Under the Hong Kong Planning Standards and Guidelines, a standard of 70 dB(A), measured as LA10 (1 hour), has been setfor road traffic noise. The Calculation of Road Traffic Noise (CRTN) method has been adopted in Hong Kong to estimate suchnoise. This study first examined and evaluated the accuracy of this method in predicting traffic noise at different floo...
Autori: Cheuk Ming Mak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26082

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

AbstractThe present study was focused to classify various advanced oxidation processes (AOPs) to degrade sixteen commonpharmaceuticals and personal care products (PPCPs). The classification was based on the degradation rate constant (h-1).Chemometric techniques like principal component analysis (PCA) and cluster analysis (CA) were used to classify AOPs whichcan efficiently degrade a certain class of PPCPs. The bipolt based on first two principal components (PCs) of PCA modelidentified two distin...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26085

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

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

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

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

Abstract Municipal waste landfill leachate results in different stages of waste stabilization and has a negative impact on the environment. When implementing a new policy on waste handling, monitoring landfill leachate should be carried out under conditions of a modern solid waste landfill. The paper discusses the quality of leachate observed in old and recently built landfills in Vilnius - the capital city of Lithuania. The landfills are situated at a distance of 20 kilometres fro...
Autori: Kristina Baziene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26151

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

AbstractThe efficiency of enzymatic hydrolysis of Penicillin G to 6-Aminopenicillanic acid under substrate inhibition has been analyzedfor a bioreactor with mobile bed of immobilized penicillin amidase. The results indicated that the optimum values of temperatureand pH remained the same as for homogeneous hydrolysis using free enzyme. The inhibitory effect induced at higher PenicillinG amount in liquid phase was attenuated by increasing the size of the biocatalyst particles. For this reason, at ...
Autori: Ramona Mihaela Matran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26224

AbstractPresent study deals with a technology that reduces the cadmium(Cd) availability to the leafy vegetable Amaranthus caudatusfrom Cd contaminated soil (6 μg Cd g-1soil), amended with farmyard manure FYM, FYM+NPK and agricultural wastes (ricehusk; RH and saw dust; SD) at different doses (0.5 %, 2 %, 5 % and 10 %). Among all the doses 5 % was found to the best foreach amendment showing maximum reduction in phytoavailability of Cd hence better vegetable yield. At this dose the reductionin...
Autori: Anita Singh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26228

AbstractIn this article, hydrodynamic parameters and overall Oxygen mass transfer coefficient of petroleum based micro-emulsions in anairlift reactor were investigated. Four different petroleum-in-water micro-emulsion systems containing kerosene, heavy naphtha,light naphtha and diesel as oil based were used with concentrations of 3% and 7 % (v/v). The experimental data were supportedby simulation results obtained from the Computational Fluid Dynamics (CFD) method. The CFD was properly able to si...
Autori: Mostafa Keshavarz Moraveji
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26234

AbstractThe vortex flame concept of combustion has been well known to produce low levels of NOx. This feature qualifies it to be usedin industrial processes and in power generation to comply with the environmental regulations concerning nitrogen oxideemissions. An asymmetric vortex flame combustor has been recently proposed by the authors. The present article reports thelevels of NOx emissions of such combustor for the first time. An experimental platform designed and developed to examine theNOx...
Autori: Khalid M. Saqr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26245

AbstractBased on principles of feeding solid waste into vertical boreholes in fully mechanized coal mining and backfilling technology,the literature established a trajectory model of particles in gas-solid two-phase flow for the sake of reducing the damage tostorage silo underground done by enormous impulsive force generated by falling solid waste. In addition, dynamical analysismethod in gas-solid two-phase flow field was adopted herein to study the solid particles’ force characteristics and th...
Autori: Nan Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26271

AbstractThis study aims to investigate the environmental impacts of the municipal waste disposal facility of Pata Rat, Cluj-Napoca, Romania during dry periods of the year. The environmental impact assessment on the landfill site was carried out on the basis of the measurements of environmental quality indicators. Environmental indicators were measured in the surface water, soil and air. For the assessment of the environmental impacts generated by landfill on surface water measurements were carri...
Autori: Ákos Rédey, Anca Gurzau, Antoanela Popovici, Constantin Măruţoiu, Fazekas Bence, , Ildiko Varga, Raluca Mariana Haţegan, Tatiana Yuzhakova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26296

AbstractThe main aim of this study is to evaluate the residents public awareness from water-polluted areas in Tehran city, in terms ofwater quality (in particular nitrate pollution), and to measure their different performance and approaches to this environmentalproblem. For this purpose, district 18 (Yaft Abad, southwest of Tehran) was selected as a case study. A questionnaire wasprepared and distributed randomly among residents of the selected area in May 2011. The data were analyzed statistica...
Autori: Mohammad Mahdi Azadegan, , Reza Maknoon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26314

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

AbstractThe distribution and fractionation of nine heavy metals (Cr, Co, Ni, Cu, Cd, Zn, V, Pb and As) in the sediments of Lake Chaohu,a shallow eutrophic lake, were investigated using the BCR sequential extraction procedure. The level of pollution attributed tothese nine heavy metals was evaluated employing the potential ecological risk index (RI) and geoaccumulation index (Igeo). Metalconcentrations in sediments ranged from 65.00~104.00 for Cr, 14.50~21.70 for Co, 28.50~50.90 for Ni, 25.40~51....
Autori: Beidou Xi, Fengyu Zan, Guangchao Zhao, Jing Su, Kevin M. Yeager, Shouliang Huo, Xiujuan Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26321

AbstractThe aim of this study was to evaluate the results of an urban pilot project on separate collection of packaging wastes. The projecthas been performed in a developed and industrialized city of Turkey, Kocaeli with the aim of collecting packaging wastesgenerated in residents, public offices and other business offices. The project was carried out according to packaging wastemanagement plans developed by sub-municipalities in coordination with Kocaeli Metropolitan Municipality. Total monthly...
Autori: İsmail Özbay
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26325

AbstractCosmetics, toiletry and household cleaning products are often based on different types of polymeric gels with specific rheologicalbehavior. Dynamic shear oscillation measurements were used for the monitoring of in situ polymerization process, and todetermine the viscoelastic properties of the hydrogels based on polyacrylamide and acetone-formaldehyde resin. Both storagemodulus G’ and loss modulus G” were measured in real time during the gelation process carried out directly between the p...
Autori: Andrei Rosu, Camelia Mihăilescu, Constanţa Ibănescu, Gabriela Halitchi, Maria Lungu, Maricel Danu, Simona Bistriceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26326

AbstractAlgal blooms in reservoirs used for both fish and drinking water production are a major water quality problem. The authorsassessed data gathered from both published literature and from their own field enclosure experiments to analyze the relationshipsof phytoplankton chlorophyll α concentrations with biomass and algal cell count. Experimental data were collected from indoorlocations, field enclosures, and natural water bodies. Under laboratory conditions, where the types of algae an...
Autori: Chang-juan Zang, Chao Lin, Feng Gao, Hong-chuan Pan, Miklas Scholz, Min Wu, Sheng-lan Du, Sui-liang Huang, Yong Guo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26335

AbstractThis paper discussed the potential ecological risk, homologous relativity and spatial distribution of heavy metals in the waterlevel-fluctuating zone (WLFZ) of the Xiao River, a tributary of the Yangtze River. The Cd, Cu, Pb and Zn contents in the WLFZsoil were analyzed via atomic absorption spectroscopy. The potential ecological hazards of the heavy metals were also evaluatedusing the classical Lars Hakanson potential ecological risk index method. The average Cd, Cu, Pb and Zn contents ...
Autori: Chuan Fu, Dan Liu, Junjie Lin, Zhiguo Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26346

AbstractMonitoring an unstable slope is quite important for environmental safety. Based on our previous studies, this paper presents athird-generation distributed optical fibre transducer. The operating mechanism of this novel transducer was analysed for itsresponse to a single concentrated and uniform load, and a theoretical study was conducted on the elongation of the bottomsurfacefibres of a bending resistance model at the phases of linear elasticity and total cross-section cut-off stage. A b...
Autori: Bang Liu, Dong-Yan Liu, Hu Luo, Jing-Cheng Liu, Qiao-Ying Yuan, Yun-Ju Luo, Zheng-Wei Zhu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26348

AbstractFactors influencing the distribution of Origanum onites L., (locally known as Turkish oregano) were analyzed on the LakesDistrict of Turkey, using Two-tailed Wilcoxon’s runk sum statistics and Pearson chi-square χ2 test contained in the SPSS 17.0package. An inter-specific correlation analysis (ICA) was also applied to determine indicator plant species of O. onites. Analysesperformed on environmental factors showed that there is a relatively high correlation between the occurance of ...
Autori: Mehmet Güvenç Negiz, Serkan Gülsoy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26354

AbstractBecause of the current researches ignoring the spatial spillover effects of Foreign Direct Investment (FDI), this study empiricallyanalyses the spatial spillover effects of FDI on carbon emission intensity by using the spatial panel data model. Results show thatthe spatial autocorrelation between FDI and carbon emission intensity in China is evident, and that FDI is not only conducive toreducing of carbon emission intensity of the local region whose space spillover effects but also has a...
Autori: Wei Zhang, Xiongfeng Pan, Yue Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26379

AbstractThe naturally or industrially occurring flammable mixtures containing combustible gases or/and dusts represent a potential risk ofexplosion with major consequences on the environment and human personnel. Methane and coal dust are among the best knowncomponents able of leading to the formation of such mixtures either in coal mining activities or in different industries using coaldust as fuel. In order to assess the risk of explosion and the explosion evolution in such composite mixtures, ...
Autori: Maria Prodan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26402

AbstractAir quality in urban areas mostly depends on the type and size of industrial activities, traffic intensity, municipal and industrialwaste management. In addition to these factors, air quality in urban areas also depends on the size and quality of green areas,population density, geographic and climatic conditions. This paper reveals the correlations between air quality aspects in BacauCity, Romania (related to 2011) and the most representative climatic factors that influence the pollutant...
Autori: Doina Capsa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26424

AbstractThe changes in fresh water quality are reflected, over time, in the structure of the biocenosis by adjusting the composition, theabundance and the spatial distribution of species, in an attempt to maintain a constant equilibrium. It is difficult to identify thisequilibrium just by analysing the physicochemical measurements because they represent water quality conditions of the moment,while the analysis based on biological indicators which are reflecting the composition of macrozoobenthos...
Autori: Roxana Nechifor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26431

AbstractThe objective of the study is to set up and calibrate a model using the soil and water assessment tool (SWAT) in order to simulatethe water flow in the Buyo Lake located in west of Cote d’Ivoire and to test and evaluate the usefulness and the performance ofthe model. In this study, we had used the ArcSWAT graphical user interface to manipulate and execute the major functions ofSWAT model from ArcGIS tool. Hydrological modeling of Buyo Lake Basin was carried out with the ArcSWAT interface...
Autori: Tanoh Jean-Jacques Koua
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26442

AbstractThe present work is dealing with the identification of the mercury sources and the quantification of the mercury level in air andurban dust in the industrial area of Iasi municipality. A correlation between some meteorological indicators, atmospheric mercurycontent and the urban dust from the investigated area was pointed out, based on the real time measurements as well as spatialdistribution of other heavy metals in urban dust.The measurements of mercury level in air were carried out at...
Autori: Oana Maria Tucaliuc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26479

AbstractAir flow measurements as well as concentration measurements within a naturally ventilated dairy barn (NVD) were carried outduring one summer season of 2012. Air flow measurements were performed using ultrasonic anemometers (UA), either as shortduration (20 min duration) measurements with a higher spatial distribution (using up to 9 UAs at the same time) or as long period(roughly 2 weeks) measurements with a lower spatial resolution (3 to 5 UAs). Measurements were conducted at two heights...
Autori: Merike Fiedler
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26496

AbstractThe distribution of mixing time for a split-cylinder gas-lift bioreactor has been investigated for simulated broths with apparentviscosities up to 26 cP. The results indicated important variation of mixing time on the height of riser or downcomer, as well asdifferent behavior of dispersion flows in the two regions. Thus, the highest mixing efficiency for the ascending circulation hasbeen recorded for the intermediary positions, placed above the sparger. Contrary, for the downcomer, the i...
Autori: Anca-Irina Galaction
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26560

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

AbstractThe hotel industry constitutes a major sector of the wider tourism industry and, in common with other industries, hospitalityoperations inevitably entail environmental impacts. Requirements for corporate financial reporting are commonplace, but publicdisclosure of the environmental effects of organizations’ economic actions - referred to as environmental reporting – whilegenerally only a voluntary commitment offers a potentially valuable contribution towards assessing the industry’s glob...
Autori: Patricia Milanés-Montero
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26572

AbstractWe reported the results of an isotopic study aimed at evaluating the medium to long-term effects of different water qualities anddeficit irrigation strategies on the ecophysiology of grapefruit in a 7-year-old plantation in SE Spain. For a better understandingof the interaction between nitrogen and salts from reclaimed water, RW, an experiment using natural abundance (δ) of 15N wasconducted. This study showed that in grapefruit crop irrigated with RW leaf δ15N value increased. ...
Autori: Cristina Romero-Trigueros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26573

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

Abstract The assessment of heavy metals pollution using Xanthoria parietina (L.) Th. Fr. as an indicator species was performed for forests from Bucharest metropolitan area. This study aims to provide original data concerning environmental quality in relation to the intensity of car traffic. Metal concentrations in Xanthoria parietina measured in sites adjacent to roads were compared with those measured at a distance from traffic. The results show significant correlations between the Cd and C...
Autori: Ioana Vicol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26593

Abstract Xi’an-Baoji Highway is one of the oldest and most important highways in northwest China. In this study, the concentrations (0-20 cm) of Pb, Zn, Cu and Cr at 5-1000 m distances in the roadside soils along Xi’an-Baoji Highway were experimentally determined to analyze their spatial distribution and evaluate their contamination levels. The spatial distribution (mg·kg-1) of Pb, Zn, Cu and Cr at 5-1000 m distances from the both roadsides (North/South) is, respectively, ...
Autori: Shuanxi Fan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26610

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

Abstract The effects of nitrogen (N) and phosphorus (P) addition to peatland ecosystem on emissions of nitrous oxide (N2O) were measured using the closed chamber method during one growing season within a peatland on the Tibetan Plateau. The highest N2O fluxes occurred during late spring (May), while fluxes of N2O were lowest during early autumn (September). No significant correlations were found between N2O emissions and soil temperature. Because of the sites stable hydrological conditions n...
Autori: Yongheng Gao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26626

Abstract Remote sensing data has been broadly used in assessing and monitoring natural resources. Monitoring forest resources with Landsat Thematic Mapper (TM) and other fine resolution sensors has become a challenging work in a wide variety of forest applications. In this paper, the relationships between stand crown closure with spectral reflectance values and some vegetation indices (VIs) obtained from Landsat TM were investigated in a case study area. The Pearson correlation and multiple ...
Autori: Alkan Günlü
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26631

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

Abstract The oxygen transfer into the fermentation broths could be improved in presence of oxygen-vectors, without intensification of mixing or aeration. The experimental results for simulated, P. shermanii and S. cerevisiae broths indicated the significant increase of kLa, by adding n-dodecane, but the magnitude of this effect depends especially on the cells affinity for hydrocarbon droplets. Therefore, due to the higher affinity of yeasts cells for hydrocarbon droplets during their entire ...
Autori: Anca Irina Galaction
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26657

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 A novel sensitive and rapid analytical approach based on ultra-high performance liquid chromatography - mass spectrometry (UHPLC/MS/MS) tandem was developed for the monitoring of pentachlorophenol in water samples. Chromatographic separation was carried out on Acquity BEH C18 (100 x 2.1 mm, 1.7 μm) column under gradient mode using a mobile phase consisting of acetonitrile/ultrapure water/formic acid. Quantification of pentachlorophenol was performed on a triple-quadrupole tandem ...
Autori: Yassine Kadmi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26673

Abstract The deterioration of the natural polymers is a very complex process, and a problem that can be best addressed through modelling. The approach for modelling the rheological behaviour of different cellulose-based textile fibres (cotton, hemp, flax) when subjected to a hydrothermal treatment, followed by exposure to different doses of gamma-rays (5, 10, 15 and 25 kGy) is presented here. In order to predict the optimum radiation dose limit and hydrothermal aging time, the mathematical m...
Autori: Angelica Olaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26678

Abstract Mapping the distribution of populations has become an important issue in geographical and relative researchers. Combining population and spatial data allows for socio-graphic information to be visualized, in order to evaluate the total numbers of people at risk of environmental health hazards, who have died in natural disasters etc. Therefore, spatial distribution of population data is an effective way to integrate statistical and spatial data. This paper presents a multi-factor dat...
Autori: Yu Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26686

Abstract Currently, conventional energy sources i.e. fossil fuels represent the main segment as regards electricity generation. Thus, their contribution to global CO2 emissions is considerable. This study considers carbon capture and storage (CCS) as a promising solution for the environmental problems we are now facing. Based on previous research, post-combustion capture (PCC) has been recognized as being the more appropriate technology for CO2 capturing from the existing power plants. The m...
Autori: Ales Hribernik
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26714

Abstract The paper investigates the role of the Common Agriculture Policy support in the economic sustainability of sheep breeding farms from North-Western Romania (Transylvania), focusing particularly on the Agri-Environment Schemes (AES). The region has important High Natural Value (HNV) grassland areas significant for bio-conservation. To analyze their importance in the overall economic viability, individual data was collected from 207 farms using a stratified sample. A principal componen...
Autori: Mugurel I. Jitea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26716

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

Abstract Response surface methodology and central composite experimental design were used to model and optimize the operational parameters of the excess sludge protein extraction yield by ultrasonic wave-assisted extraction. The three variables involved in this research were the ultrasonic extraction time, pH, and temperature. In the range studied, statistical analysis of the results showed that selected variables had a significant effect on protein extraction yield. The optimized extraction...
Autori: Yulin Xiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26736

Abstract In order to verify the possibility of agricultural drought forecasting and prediction of agricultural yields in a given region, two climatic indices were used to monitor drought: Standardized Precipitation Index (SPI) and Bhalme - Mooley Drought Index (BMDI). For the case study were taken into account conditions in Oradea, from Crişurilor Plain, which is located in the Western Romania. Evolution of dry periods determined by the two indices is similar but there are differences i...
Autori: Nicu Cornel Sabău
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26766

Abstract The preliminary results of aromatic hydrocarbon (AR) levels and PM2.5 physico-chemical characterization in Rome urban air throughout the 2014 are reported. A gas chromatograph was used for continuous measurements of AR concentrations with 30 minute time intervals. PM2.5 was collected by PM swam Dual Channel. Metal content was determined by ICP-MS. Single particle characterization was performed by Scanning Electron Microscopy equipped with a thin window system for X-ray microanalysis...
Autori: Carla Fanizza
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26780

Abstract This study carried out for the first time a comparison among ligninolytic (white-rot) and cellulosolytic or xylanolytic (Trichoderma) pre-treated wheat straw, for biogas production, potential, without or with pig slurry in co-digestion. Methane (CH4) production from wheat straw pre-treated for 4 and 10 weeks with seven different fungal isolates was preliminarily measured. Then, the effects on biogas yield of the co-digestion with pig slurry were checked on straw pre-treated with 3 s...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26796

Abstract Although in Lithuania artificial land drainage is a common water management practice, there are still concerns about its downstream hydrological effects. Due to the complexity of flow driving factors, the hydrological effect of drainage is very uncertain, making it difficult to determine its relative importance. Aiming to distinguish between the influence of drainage and other factors in this study, the extent of changes of twenty hydrologic variables (flow magnitude, frequency, dur...
Autori: Arvydas Povilaitis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26848

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

Abstract Romania has recorded a dramatic number of road traffic accidents in the last five years. The latest European documents and statistics indicate that the country has the highest number of traffic fatalities across the Member States of the European Union. The aim of the paper is twofold. First, the authors aim to analyze the spatial characteristics of traffic accidents for the period 2010-2014: spatial distribution of accidents at county level, number of vehicles involved, socio-spatia...
Autori: Silviu Marian Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26893

Abstract The present study analyzes the background pollution in Romania using official data reported for recorded air pollutants from the automated regional stations located at three mountain sites. A series of key figures regarding the trend of background pollution at Romanian mountain sites was extracted based on annual average concentrations recorded between 2010 and 2013 i.e. 8.8 ± 5.2 μg NO2/m3, 5.3 ± 1.6 μg SO2/m3, 0.075 ± 0.035 μg CO/m3, 3.2 ± 0.9 ...
Autori: Daniel Dunea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26897

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

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

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

The influence of the Black Sea on the continental climate is generally limited, comparatively with other maritime basins. Nevertheless, the influence is important for local scale environment, with several applications in the economy, i.e. building industry, agriculture, forestry. The extension of the Black Sea influence inside the Dobroudja Plateau has been tackled constantly by the Romanian climatologists, the main methodological problem being the low number of meteorological stations in Do...
Autori: Sorin Constantin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26963

White pollution is a form of environmental pollution which has taken unprecedented dimensions in many cities of Europe over the last two decades. It is estimated that by 2020, European Union citizens will reduce the consumption of plastic shopping bags by 80% in ways that will be identified and implemented by each member state. Starting from these two main dimensions, necessity and opportunity, we have conducted a survey on the eco-responsible behavior of consumers in Bucharest. The main aim...
Autori: Armenia Androniceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26972

The application of chemical fertilizers and fungicides is an important source of heavy metals into the agricultural soil. Leaching and weathering can facilitate the transport of the contaminants through soil to the groundwater. In most rural areas, groundwater is used for drinking and irrigation purposes, without any treatment, population being exposed to direct contamination. The study area in this paper, Arjaat Village from Rabat Salé Zemour Zaer Region of Morocco, matches into this ...
Autori: François Xavier Nshimiyimana
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26980

During three years, 2011-2013, time series of 222Rn (radon) and 220Rn (thoron) progeny concentration measured at Bacau, Romania have been analyzed with different deterministic instruments in order to extract valuable information about their deterministic behavior. The time series of data were obtained within the framework of the monitoring program performed by the Environmental Radioactivity Monitoring Station, Bacau. Correlations with the deterministic nature of atmospheric temperature and ...
Autori: Marius Stamate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26982

Our study aims to analyse soil quality based on the concentrations of potentially toxic elements (PTEs) in natural or slightly modified anthropogenic soils, technosols and landfill deposits in Iasi. The pollution level analysis based on lognormal distribution plot allows the differentiation of elements coming from the parent material (Mo, Cd, Ni and As) of those with anthropogenic origin (Pb, Zn and Cu). The enrichment factor (EF) calculated based on manganese (Mn) as reference in the parent ...
Autori: Cristian Vasilica Secu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26991

The diversity of life cycle impact assessment (LCIA) methods may create barriers to life cycle assessment (LCA) since the focus and outcomes generated could be quite different. Furthermore, these could lead to different interpretations and hence affect the robustness of LCA. While previous studies have attempted to compare various LCIA methods, their results are limited to the cases that were used in their respective studies. To assist LCA participants in selecting a suitable LCIA method to a...
Autori: Ya Hong Dong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27012

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

A test for quantifying the contribution of colour and scale to the visual impact of buildings in the rural setting was developed and validated by means of a public opinion survey. The method was based on some psychological aspects of visual perception and on a simple image treatment performed by a well known and easily available computer program. Results were provided as numerical values, enabling the quantification of the impact for the two individual elements studied and for their potential in...
Autori: María Jesús Montero-Parejo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27080

Triton X-100 (TX100) and Tween 80 (TW80) were used to study the decontamination of polycyclic aromatic hydrocarbons (PAHs) in the bulk and different size fractions of soil samples from a former coke oven plant. The effects of PAH ring number, initial concentration and soil total organic carbon (TOC)/black carbon (BC) contents on PAH removal efficiencies were analyzed. Surfactant washing for the bulk sample showed clear relation between the removal efficiency and PAH ring number. When the sur...
Autori: Helian Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27093

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

This study investigated the different behavioral responses of zebrafish (Danio rerio) under sudden stress from two types of chemicals (heavy metals and insecticides) and explored the correlations of behavioral responses and several well-known biomarkers. Adult zebrafish were exposed to cadmium (Cd) and deltamethrin for 5 hours. An increase in avoidance speed and turning frequency was first detected behavioral response. The duration of hyperactivity was almost 50 min in the deltamethrin expos...
Autori: Yi Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27149

Phosphorous (P) and organic carbon (OC) found in organic matter (OM) play pivotal role in the productivity process of aquatic environment and significantly controlling its physico-chemical properties. The excessive P and OC containing muds of aquaculture systems deteriorate the congenial culture environment through developing eutrophication problems. The objective of present study was to determine the distributional relationship between the P, OC, and OM in the mud of shrimp-farming ponds of Vie...
Autori: Jatindra N. Bhakta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27175

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

Traditional methods of fetal monitoring are used mainly during labor, leaving the only course of action − the caesarean intervention − in cases with high risk of fetal distress. We used another approach and set up a database that consists of cardiotocographic (CTG) recordings acquired ante partum during the 25th-28th week of pregnancy, by means of a Monica Healthcare AN24 fetal monitoring system. The analyzed signals are the maternal heart rate (MHR), the fetal heart rate (FHR) and t...
Autori: Alexandru Păsărică
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27201

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

In the present study, the effect of chitosan as an eco-friendly coagulant aid was investigated for removing turbidity (bentonite) and humic acid (HA) in the coagulation process. The effects of various operational parameters such as initial pH of the solution (4-9), dosage of chitosan (1-4.5 mg/L), dosage of alum (10-40 mg/L) and initial turbidity (10-150 NTU) were investigated. An artificial neural network (ANN) model was used to predict the performance of turbidity removal efficiencies by coagu...
Autori: Abdolmotaleb Seid Mohammadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27223

An important objective of local authorities is to obtain quickly precise information concerning the land cover changes and to monitor them. This type of information can be gathered with the help of multitemporal satellite images Landsat Thematic Mapper (TM) and Landsat Thematic Mapper Plus (ETM+). This paper identifies and analyzes the land cover changes in the metropolitan area of Brasov, Romania, using Landsat 5 TM images acquired in 1987 and 2009 and Landsat 7 ETM+ acquired in 2000. The image...
Autori: Iosif Vorovencii
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27250

Changes in the climatic and hydrological variables in North-Eastern Romania indicate that the region has mostly a common evolution in terms of precipitation and hydrostatic level of groundwater. This can influence human communities in the region, given that sources of public water supply are predominantly from underground. In the analysed region with more than 8.000 sqm, 50% of the population lives in the rural area, where the main water supply source is provided by the underground water, mainly...
Autori: Ionuț Minea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27284

Researches and analysis of heavy metals concentrations in the fish species exploited as a food source are of great interest due to long term toxic effects on human health even at very low concentrations. Therefore, we have conducted this study in an area of great interest in terms of aquatic biodiversity, but also of tourism and trade. Depending on the degree of toxicity in delta aquatic ichtyofauna, five heavy metals (Cr, Cu, Hg, Ni, Pb) and a metalloid (As) concentrations were measured in the ...
Autori: Adrian Burada
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27293

According to literature, aggregate stability of soils is influenced by: particle size and soil texture, soil structure, content of Ca2+ and Mg2+, mineral clay type, soil content of organic matter, soil processing degree. This paper aims to investigate the influence of some physical, microbiological and chemical properties of saline soil concerning water-stable aggregate. The hydro system stability of the aggregates appears in the specialized studies as having a positive correlation with microorg...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27300

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

In the current context of industrialization, chemical and radioactive pollution is a concern for environmental protection and interference with human health. Care for environmental protection also includes vegetation that grows spontaneously in potentially contaminated places, thus avoiding illness among the population if consumed. The study area is located at 4.5km SSE from downtown Bacău City, Romania and is the result of the manufacture of H3PO4 through the wet method. In this study, t...
Autori: Mioara Săndulache Rachieru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27331

Environment-friendly demulsifying strains could be applied in breakup of emulsion produced in the petroleum industry. The demulsifying strain Alcaligenes sp. S-XJ-1 was found to be capable of utilizing paraffin or certain pure n-alkane as its sole carbon source, and exhibited a strong cell surface hydrophobicity above 70% and demulsifying ability above 80%. A maximum biomass of 6.27 g/L was obtained when the demulsifying strain was cultured using eicosane as carbon source. A positive correlation...
Autori: Xiang-Feng Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27379

The objective of this study is to develop a back-propagation neural network (BPNN) to assess the health status of estuarine ecosystems. The BPNN objectively reflected ecosystem health due to the weight and bias values obtained by the network training, owing to its adaptive learning, self-organization and fault tolerance. Correlation analysis is used to avoid double counting of the input variables. Particularly, 11 ecosystem health indices were used as assessment parameters to establish a set of ...
Autori: Chao Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27387

This study analyses the relationship between the scattering properties and the chemical compounds internal mixture of the aerosols near Bucharest, Romania. Several cases of local aerosols influenced by heating sources, like wood or fossil fuel, are characterized in order to retrieve the winter period specificity. Correlation between organic and inorganic aerosols composition from mass spectrometry measurements made with Compact Time (CT) of Flight Aerosol Mass Spectrometer (AMS) and scatteri...
Autori: Luminita Marmureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27444

Study on ambient noise cross-correlation has been progressively developed. However, it is still challenging for noise sources are not evenly distributed. Therefore, we are concerned with how the multiple parts of the noise cross-correlation function are affected by noise sources, so as to obtain more valuable information. The temporal variations of traveltime and amplitudes of noise cross-correlations computed in a moving 5-day window for the two period ranges corresponding to the primary (10...
Autori: Fang Ye
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27446

Many firms are beginning to use sustainable Information Technology (IT) initiatives in their daily operations. The usage is generally associated with several factors, among them pro- environmentalism behavior and organizational pressure. Furthermore, the usage of sustainable IT initiatives has been considered to have influenced the financial performance of firms. Hence, this paper seeks to examine the factors associated with sustainable IT usage and their impact on the financial performance of ...
Autori: Noor Ismawati Jaafar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27528

A micelle-mediated preconcentration method has been developed for determination of Safranine T at trace amounts, which is widely used in textile industry. It can be evaluated as one of the dangereous chemicalsdue to its carcinogenicity and toxic properties. The method is based on the cloud point extraction (CPE) of Safranine T at pH 8.0 in the presence of Triton X-114 as nonionic surfactant. The obtained surfactant–rich phase (SRP) was diluted with ethanol and its absorbance was measured ...
Autori: Songül Ulusoy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27538

In this paper, a model based on Back-Propagation (BP) artificial neural network was proposed, as a tool predict the soil suitability for cultivation in Jiangxia district. The model takes the soil nutrients indicators as the input and the level of soil suitability as the output. The correlation analysis showed that the correlation coefficient between expected output and actual training result is 0.99. The simulative results indicate that the learning and generalization ability of the model perfor...
Autori: Zhuoyan Feng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27546

This paper presents the research on the temporal variability of water quality parameters for the most important river system in Romania and Europe – Danube River. The data on the river water quality had been obtained during ten years. The investigation was systematic and complex. Using the Kolmogorov-Smirnov test, and traditional statistical methods based on correlation matrix - Principal Component Analysis (PCA) and Factor Analysis (FA), and ANOVA all the samples data sets were classified...
Autori: Paula Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27601

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

Tobacco is one of the most important agricultural products in the Republic of Macedonia. Elemental composition of tobacco and soil from different agricultural areas was studied for monitoring purposes. The main purpose was to determine the intensity of accumulation of various elements in tobacco plants and to determine possible relationships between certain chemical and physical properties of soils (pH, clay, cation exchange capacity - CEC, organic matters - OM and total organic carbon - TOC). T...
Autori: Biljana Jordanoska
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27625

Polycyclic aromatic hydrocarbons (PAHs) are very hazardous compounds. This investigation is the third in a series of three experiments carried out in conventional wastewater treatment plants with regard to PAHs. The first experiment regarded the analysis of PAHs in a municipal wastewater sewage system and in the wastewater treatment plant (WWTP) effluent, followed by a comparison between the observed removal efficiency and FATE model (US-EPA) predictions. The second experiment was carried out in...
Autori: Vincenzo Torretta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27629

The present study aims to examine and model the adverse effects of vehicular emission on urban air quality and consequently on human health. It will facilitate the town planners to quantify the ill effects of vehicle generated air pollutants on human health to enable them to decide due weightage to be given to this attribute at planning level. Allahabad, a metropolitan city of India has been selected as the study area. Monitoring was conducted at various locations in the study area to evaluate t...
Autori: Binay K. Singh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27638

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

Timber harvesting activity represents one of the major sources of the forest terrain erosion. Several studies have been performed in order to quantify the rate of soils erosion by considering the practices used in forestry, and some of them concluded that the associated erosion can be regarded as the price of having roads. The current study focused on the used practices in developing skidding trails and the associated erosion phenomena. There was found that some of the used practices (the lon...
Autori: Cristian Ionuţ Duţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27673

Sulfide bearing mine tailings generated through mining and processing of mineral ores is one of the serious problems around the world due to their potential environmental hazards. Current study focuses on vertical distribution and potential mobility of metals in New and Old tailings of a Lead and Zinc mining area of India. Mine tailing profiles sampled from New (0-500mm) and Old tailing (0-400mm) dams were chemically (pH, EC, Carbonate content, Cd, Pb, Zn and Mn levels) and mineralogically (usin...
Autori: Malik Anju
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27690

Industrial wastewater is of particular importance. In most wastewater treatments, physicochemical parameters are used to determine the performances which are costly while protozoa can be used as less expensive biological indicators to determine the efficiency of the treatment plant. The purpose of this study was to investigate the relationship between protozoa and physic-chemical characteristics of the Abadan wastewater treatment industry. Samples were collected from wastewater stabilization po...
Autori: Abotaleb Bay
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27694

The reuse of sewage sludge will be increasing in the future, with expansion of sewerage works and advanced sewage treatments. During anaerobic digestion of sewage sludge from wastewater treatment plants the humification of organic matter will have an important effect on the physico-chemical forms of heavy metals. The aim of our paper was to investigate mobility of zinc from dried anaerobic sludge (DANS) from municipal wastewater treatment plant (WWTP) via single step (simultaneous) extraction pr...
Autori: Vladimír Frišták
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27695

Though Scirpus triqueter plays an important role in protecting the ecological functions of Yangtze River estuary wetland which is frequently contaminated by petroleum, knowledge is limited about the mechanisms involved. In this study, comparative analysis of soil properties, microbial community structure and soil enzymes in the rhizosphere of S. triqueter and bulk soil was conducted throughout one year to provide an insight into the phytoremediation mechanism in the field. The total petroleum hy...
Autori: Jing Wei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27697

The aim of this study was to evaluate the content of Zn, Mn, Cu and Ni in the aboveground and underground shouts of Glyceria maxima and in the bottom sediments of the Słupia River. These studies allow for assessment of the existing and potential hazards resulting from toxic influence of heavy metals on water environment and human health. The concentration of research elements was determined by atomic absorption spectrometry (AAS). Results indicate that the concentration of heavy metals in t...
Autori: Agnieszka Parzych
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27701

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

Influence of soil pH on the mechanical characteristics of glass reinforced plastic (GRP) pipes type was often investigated in different situations encountered in the field. GRP degradation is directly proportional to the exposure to soil with non-neutral reaction. The theoretical and experimental results lead during time to design standards, which allow the application of GRP pipes in water and soil, so as minimum interferences with the materials used in the manufacture of pipes would appear. Sa...
Autori: Ana Diana Ancas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27768

Indoor air quality (IAQ) improvement potential of rotor turbine ventilator (RTV) was researched by setting up an RTV on the outer part of the chimney of a kitchen, located in a “windy” city, Çanakkale, Turkey. Efficiency of RTV was assessed by preliminary tests, conducted in a three-storey restaurant. After obtaining positive results in terms of airborne bacteria count (TBC) from these tests, long-term measurements were carried out in a cafeteria by air sampling before and aft...
Autori: Sibel Mentese
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27734

This paper presents the effect of heavy metal soil pollutants (Pb, Cd, Cu, Zn) on soil mite communities in three urban parks within Bucharest, Romania: Cişmigiu, Unirea and Izvor. For each park, the investigations were based on three transects that were established in relation to the nearest source of air pollution i.e. heavy traffic from the main boulevards. The study was carried out in 2007. 405 soil samples were collected, comprising 14 species of Gamasina. The highest numerical density ...
Autori: Minodora Manu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27736

In this study, the development of a suitable methodology for establishing and monitoring indicators of Ecosystem Health (EH) and its responses to wildfire using Earth Observation (EO) data synergistically with Geographical Information Systems (GIS) is investigated. The proposed methodology combined GIS and Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM+) data to assess ecosystem characteristics, including its vigor, organization and resilience, for a case study in Central Gr...
Autori: Aaron Evans
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27745

This study was conducted to screen plants growing on potentially contaminated areas of landfill body and nearest surrounding to determine their potential for metal accumulation. In addition, enrichment coefficient (EC) for plant/soil system, correlation and principal component analysis were used for determining the environmental contamination from landfill in terms of heavy metal (HM) accumulation. The examined plant samples meet the stated requirements. The highest values in samples 1 - 8 reach...
Autori: Magdalena Daria Vaverková
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27752

Water sea pollution is influenced mainly by anthropogenic causes due to industrial and municipal activities which affect the quality of sea water, sediments and the whole ecosystem. In this paper, the correlation between contamination sources and the environmental quality of marine sediments was analyzed through multivariate analysis, in particular Principal Components Analysis (PCA), Cluster Analysis (CA) and Correlation Analysis. Considering the case study of Mar Piccolo in Taranto (Ionian Sea...
Autori: Claudia Labianca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27793

Electrochemical behaviour of YBaCo2O5 perovskite in alkaline solution was studied during oxygen insertion/release process. In correlation with electrochemical studies was analyzed the compound morphology and structure. Compound electrochemical oxidation consists in intercalation of oxygen atoms in crystalline structure, which is equivalent with a structure compaction. These results were correlated with the Brunauer-Emmett-Teller (BET) surface area of sample and also with SEM pictures. Compactio...
Autori: Mircea Dan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27866

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

This paper presents the results of a case study conducted between 2.04 and 24.04.2013 in order to establish the most relevant indicators that characterize the influence of outdoor air pollution, with particulate matter having a nominal diameter less than 2.5μm (PM2.5), on the quality of indoor air from a new building. The tests consisted in simultaneous determination of the daily average PM2.5 concentrations at four indoor sites and at one outside, nearby the building. The average PM2.5 c...
Autori: Elena Bucur
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27914

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

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

Ambient temperature can modulate neurotransmission in the peripheral nervous system. Transmission at the neuromuscular junction is also influenced by ambient temperature. Myasthenia Gravis (MG) is an autoimmune disease of the neuromuscular junction characterized by impaired transmission of the nerve impulses to the muscle fibers. The aim of the study was to determine if there is in fact a statistically significant correlation between environmental fluctuations and MG exacerbations among myast...
Autori: Dan Iulian Cuciureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28004

As one of the largest coastal wetlands in northern China, the ecological function of Caofeidian wetland has gradually degraded due to the influence of climate and surrounding environment. In order to regulate and repair the water area of the wetland, it is necessary to study and analyse the historical changes and influencing factors of the water area of Caofeidian wetland This paper extracts the water area of Caofeidian Wetland in 1984~2013 from the images collected by Landsat satellites usin...
Autori: Shaoxiong Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28022

Several theoretical studies were oriented towards the relationship between the main two building design estimators (building energy consumption and indoor environmental quality) but very little experimental research has been carried out in order to underline the correlation between this two parameters. This paper is focused towards the experimental study of the correlation between these two design estimators. Several indoor comfort parameters (air temperature, radiant mean temperature, sound ...
Autori: Mihai Toderaşc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28042

The increase of population and the bad management of municipal solid waste (MSW) lead to a spectacular increase of the landfill leachates volume. These effluents represent a very harmful threat that can affect the environment and the ecosystems, their control and treatment became the first occupation of the authorities. In this context, this study contributes to characterize the landfill leachate composition and how its changes over different seasons. The results have shown an intermediate leac...
Autori: Soukayna Rhouat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28100

In the present research, the intensity of contamination with heavy elements Vanadium (V) and Arsenic (As) in the coastal sediments of Bandar Abbas is gauged and rated using the method of Atomic Absorption Spectroscopy. All processes of sampling and assimilation of sediments are performed according to the guideline of the Manual of Oceanographic Observations and Pollutant Analyses Methods (MOOPAM) Standard issued by the Regional Organization for the Protection of the Marine Environment (RAPMI).T...
Autori: Akbar Elsagh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28105

The normal operation of spray humidification air cooler hinges on the good contact between droplets and air in the humidification chamber. The spiral pressure nozzle was chosen for the experiment on inlet air spray cooling. During the experiment, the spray cooling performance and atomization features were examined, and the cooling effects of different nozzle layouts were compared.Through the analysis of heat and mass transfer, the critical pressure of the spiral pressure nozzle was determined, a...
Autori: Xiaoqing Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28110

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

Soils are influenced by stand composition and hydrological regime as well as by stress abiotic factors, including forest fires. As such, this study analyzed three stands affected by fires of different severities. Soil samples were gathered during the spring of 2017 from three sample areas in Vrancea County, eastern part of Romania. For each area studied, soil profiles were studied in 3 areas affected by fires and in control areas located close to each other. The soil respiration was determined b...
Autori: Aurelia Oneț
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28120

The booming production and application of nanoparticles have raised great concern over its effect on environment, due to their increasing release in the environmental systems via intentional or unintentional activities, where their possible physicochemical and toxicological behavior remain unknown. The nanoparticles are released into the different environmental systems like air, soils and waters. However, their interaction with air matrices has been rarely investigated. For this reason, the chan...
Autori: Asli Baysal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28124

The present study represents an extension of ergosterol production by Saccharomyces cerevisiae fermentation processes using oxygen-vector by establishing the influence of the analyzed main factors, such as aeration efficiency and hydrocarbon concentration. The study has been developed for batch and fed-batch fermentation systems and has been focused on the variation of ergosterol content inside the yeast cells during the fermentation cycle in correlation with hydrocarbon volumetric fraction, COV...
Autori: Corina Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28130

Municipal wastewater treatment is a global issue and an expensive process. Treatment of the wastewater using algal growth is a cost-effective approach, because of easy propagation of algae in wastewaters through utilization of most of the nutrients and in turn reduces the pollution load. As a preliminary research work, laboratory scale studies were done using native algal species collected from particular sources. They were grown in different pond waters to observe the biomass development in co...
Autori: Iqbal Ansari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28135

Greenhouse gas (GHG) emissions represents a global challenge and a quantitative approach is a support for decision makers. The aim of this paper is to estimate future values of GHG emissions in Europe, considering different periods of reference and through two common mathematical parameters (average annual growth rate (AAGR) and compound annual growth rate (CAGR)). Results analysis show that a reduction of GHG emissions can be reached. However, some Member States (MSs) as Ireland and Netherland...
Autori: Federica Cucchiella
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28144

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

The bio-inspired algorithms are versatile approaches that can be applied to a variety of problems. However, their efficiency is influenced by a multitude of characteristics such as quality of final solution, consumed computational resources, diversity management, convergence, complexity of the problem being solved. Consequently, the issue of choosing the best approach for a particular problem is a difficult task. In this work, the performance of two bio-inspired algorithms, Differential Evolutio...
Autori: Elena Niculina Dragoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28159

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

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

Environmental quality is directly influenced by the level of pollution generated by economic, industrial or anthropogenic activities and directly affect the citizens’ life quality and wellbeing, and ensuring a good status of environment it is a stringent topic that must become the major interest for the local public authorities. The main goal of this study is to evaluate the environmental quality in Iasi city, how the overall quality is influenced by the level of pollution and what are the...
Autori: Silviu Petru Grecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28180

The western forests and rangelands of Iran in Zagros Mountain are valuable ecosystems for protecting the water and soil resources and providing the habitat for endemic fauna and flora. These ecosystems have widely destroyed by human interferences in the recent years. The land cover mapping using an accurate method is the first step to prevent the further destruction of these ecosystems. The aim of this study was to generate a land cover map of Ilam (Western Iran) using Sentinel-2A data at 10 m s...
Autori: Saeedeh Eskandari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28192

Techniques such as composting, a controlled process of decomposition of organic materials, have become fundamental to minimize the problems associated with the organic fraction of urban solid waste, as the potential to cause damage to public health, the environment and, consequently, to economic and administrative aspects can be related to this kind of waste. Microbial activity is also highlighted as a relevant factor since the microorganisms are fundamental in the degradation of organic matter...
Autori: Priscila da Costa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28222

Based on the panel data of the Yangtze River Economic Belt in 1998-2016, this paper carries out a spatial econometrics analysis on the convergence of low-carbon economic growth efficiency (LCEGE) in the Belt. The main results are as follows: there are huge provincial differences in the LCEGE across the Belt; the spatial autocorrelation (Global Moran’s I) test shows a significant spatial correlation of the LCEGE, with an obvious regional spatial clustering effect; considering the spatial ef...
Autori: Hualei Ju
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28235

This study is designed in order to determine the impact of Zhadao highway construction on ecological environment of Qinghai- Tibet Plateau, by comparing the quality of ecological environment before and after highway implementation. An index system of ecological environment impact evaluation of highway area is established, including terrain slope, vegetation coverage, desertification index and land use type. With the help of data mining and grey correlation degree theory, an ecological environmen...
Autori: Xingli Jia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28239

The urban eco-environment is greatly affected by the ecosystem and landscape pattern of the wetlands nearby. Based on geological information system (GIS), this paper explores the landscape, plant distribution and animal distribution in a constructed wetland of the Yellow River Basin through field survey, identifies the landscape pattern of the ecosystem in the study area through correlation analysis, and thoroughly evaluates the health of the wetland ecosystem based on statistical results. The ...
Autori: XueLing Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28266

Literature supports the correlation between worse indoor air quality, lower socio-economic status and disease, such as asthma, Extrinsic Allergic Alveolitis (EAA) and Carbon Monoxide Intoxication (COI). In order to determine the extent of the phenomenon in the Marche Region, hospitalization risk for asthma, EAA and CO intoxication was assessed in association with Particulate Matter 2.5 (PM2.5) air concentration and socio-economic Deprivation Index (DI). Hospital discharge records of residents o...
Autori: Katiuscia Di Biagio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28294

The concentrations of Copper (Cu), cadmium (Cd), manganese (Mn) and lead (Pb) in liver, kidneys and red meat of cattle slaughtered in selected abattoirs in Owerri metropolis, Nigeria were studied using atomic absorption spectroscopy (AAS). This was performed in relation to their concentrations in a forage grass, Panicum maximum randomly harvested from roadsides of Owerri- Onitsha and Owerri-Aba expressways. Results obtained showed that cattle meat samples contained all heavy metals studied. Thei...
Autori: Henry Uzoma Anuforo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28320

This study shows the results of the experimental investigation of refinery wastewater treatment by the electro-Fenton process. The experiments were designed using Taguchi design approach with an orthogonal array (OA) of L16 runs. Four process variables (current density (CD), temperature (T), Fe2+ concentration (Fe2+), and time (t)) at four different levels were considered for the present design. Regression analysis was performed to predict a correlation for the response function (chemical oxyge...
Autori: Zainab I. Abbas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28322

This research applied passive air pollution samplers to monitor the concentration of the pollutants nitrogen dioxide (NO2) and ozone (O3) in order to investigate the relationships between pollutant concentrations and meteorological variables. The study was carried out in three strategic sites in the municipality of Erechim, Brazil, which provide intense traffic of small and large vehicles. The pollutant analyses were performed using the method of UV/VIS spectrophotometry. NO2 concentrations vari...
Autori: Eduardo Pavan Korf
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28326

In this paper, seawater heavy metal concentrations (Al, As, Cu, Ba, Zn, Fe, Cd, Co, Cr, Pb, Mn, Mo and Ni) measured by ICP-OES and water quality parameters (NH4-N, NO3-, N, NO3, PO4-P, PO4-3, suspended solids, temperature, conductivity, pH and dissolved oxygen) were evaluated in Izmit Bay (The Marmara Sea). The study was carried out seasonally between December 2016 and September 2017 at four separate sampling stations. The mean concentrations of heavy metals in mg L-1 were: Al: 0.074, As: 0.020...
Autori: Arzu Morkoyunlu Yuce
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28333

The paper analyses the Romanian consumer’s behavior concerning the use of electric scooters for transport. The aim of the study is to investigate Romanian youths’ intentions regarding the use of electric scooters in the development of a sustainable behavior. The present article is based on a quantitative research, coordinated by the authors, conducted among young participants from Romania. A questionnaire was created using a set of items measured on a five-point Likert scale, on the...
Autori: Ana-Maria Ionescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28338

To study the inter-provincial eco-efficiency in China from multiple perspectives and various aspects, this paper built the superefficiency data envelopment analysis (US-DEA) model of undesirable outputs, σ convergence model, spatial correlation model and Malmquist index. The model constructed was used to analyze the convergence of inter-provincial eco-efficiency of different years based on the inter-provincial panel data from 2008 to 2017 in China. The spatial correlation of inter-provinci...
Autori: Weiyang Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28343

This study was performed to quantify the effects of land use changes resulting from the construction of Karkheh Dam, in southwest of Iran, on the water quality of Karkheh River. For this purpose, the periodical Landsat TM and ETM+ images were used to assess the changing trends of the land use types before and after the dam construction. The water quality data were collected from the hydrometric stations and the possible correlation between the changes in the land use types and water quality par...
Autori: Shahla Kaabzadeh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28347