Include urmatoarele articole:� Cost sensitivity analysis by Monte Carlo simulation� Mathematical modeling of gas drying by adsorption� Methyl isobutyl ketone combustion over Pt/Al2O3 catalyst� Distribution of oxygen transfer rate in stirred bioreactors with simulated broths� Unsteady heat transfer inside an elliptic cylinder� Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studies� Sustainable combined utilization of renewable forest resources and coal in Roma...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25209

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

AbstractEnvironmental pollution has posed and continues to cause specific to and complicated problems. The unsustainable production and consumption patterns result in waste that can harm health and the environment. Because of rapid population growth and urbanization, industrialization process and rural to urban migration, solid waste management is becoming more and more critical now, being a problem in rapidly growing urban centers in developing countries. All these threaten the health and well-...
Autori: Abdelnaser Omran, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25275

AbstractConsidering that the fate and behaviour of contaminants within the environment is an extremely complex issue, this paper analyzes the development of predictive models which can contribute to the understanding of the release of a contaminant.  Different types of models concerning the atmospheric transport of POPs are examined, taking into consideration that these models can be used to simulate the behaviour of contaminants. A successful simulation, in which there is satisfactory agre...
Autori: Camelia Smaranda, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25327

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

Abstract Heavy metals produced and released by anthropogenic activities generate serious environmental problems. Ions of toxic metals can bind to the mineral surface in a number of ways, including absorption, adsorption, precipitation, ion exchange. The paper shows that the fate and migration of heavy metals in soils strongly depend on the physical properties and chemical and mineralogical composition of such environments. Cadmium is one of the most toxic metals with carcinogenic and teratog...
Autori: Vasile Lucian Pavel, Dumitru Bulgariu, Laura Bulgariu, Raluca Maria Hlihor, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25577

AbstractThis paper proposes a tridimensional mathematical model for water migration time in a soil sample, as a prerequisite for thestudy of migration of various liquid pollutants in soil. The variables taken into consideration were measurement position, soiltype, porosity and the height of soil column. The mathematical models were elaborated and tested based on experimental data,assisted by TableCurve 3D software for generating linear and non-linear equations. The proposed mathematical models o...
Autori: Alexandra-Dana Chiţimuş
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26425

AbstractThe mining waste facilities in the Baia Mare region, Romania, resulted from the extraction of poly-metallic ores (including Au,Ag). Metal sulphide minerals from the mining waste facilities have a potential to produce acid rock drainage (ARD) and togenerate risk for the environment, including for the water resources. Some of the mining waste deposits from the region arelocated near the town of Baia Mare, close to the residential areas, the agricultural lands and the surface water. The sho...
Autori: Oana-Cristina Modoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26512

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

The coastal zone accommodates some of the most diverse ecosystems in the world and offers a wide range of ecosystem goods and services; therefore it has become a focal point of human development. Over the last five decades, starting from 1960s, Kuwait has seen a tremendous alteration in the natural coastal morphological landscape (CML) due to the tremendous increase on coastal population that existed 50 years ago to the present manmade environment today. Most of the population is located in ...
Autori: Saji Baby
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26947

The need of hydraulic structures for the improvement of the navigation conditions on the Danube, between Calarasi and Braila (km 375 and km 175), led to the development of studies regarding the environmental impact. The studies were made by correlating the dynamic implementation of hydraulic works with the results of the environmental monitoring, biotic and abiotic factors. The hydraulic works designed to be built-up on the Bala branch, raised issues regarding sturgeons’migration in thi...
Autori: Alina-Florina Nicolae
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27036

The hydrotechnical works (bottom sills, banks protections, and guiding wall) performed during 2011 -2017 period on the Danube river, between Calarasi and Braila (km 375-175), aimed to improve the fluvial navigation, and have imposed a continuous monitoring of biotic and abiotic environmental factors. The aim of these hydraulic works is to identify the possible negative effects which might appear and find the alternative solutions to eliminate the risks. The sturgeons, which are migratory spec...
Autori: Marius Constantin Raischi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27037

The capability of ornamental rocks solid waste (ORSW) as a low-cost sorbent was investigated in order to remove As(V) and Mn(II) from aqueous solution. Physical-chemical characterization analyses of the raw material presented albite and quartz as the main minerals. The solid waste presents low surface area (209.70 m2/g). The Langmuir, Freundlich, Sips (Langmuir-Freundlich), Redlich-Petersen and Tóth models were used to analyze sorption phenomena. The maximum sorption capability from the e...
Autori: Fernando Jorge Santos Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27246

Anthropogenic influences on the hydrological network in the lower part of the Kolubara River have been notably intensive since 1959, when huge river regulation works were constructed to open new mining fields for lignite exploitation. From that moment, the Kolubara River flowed through the Pestan's riverbed (its right tributary), and the bank erosion became stronger, resulting in the lateral migration of the river course on one hand and land loss, land use changes, and economic consequenc...
Autori: Slavoljub Dragicevic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27257

A possible prediction methodology for the concentration of pollutants wave in aquatic environment using Rough Set Theory is presented. The issue is of increasingly importance especially for early pollution risk warning. The hydro-morphologic complex characteristics of surface water bodies should be taken into account when pollution dispersion models are designed. However, when more characteristics/multi-criteria are taken into account, including pollutants physical-chemical ones and their enviro...
Autori: Georgeta Mădălina Aramă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27319

The paper presents a study concerning the influence of the hydraulic and hydrological connectivity among the oxbow lakes and the restoration of riparian-zones have on aging. Interconnectivity oxbow lakes emerge after complex regulating works for the protection of the shores and bottom of the lakes. Research has analyzed the influence of the hydraulic connectivity of three lakes located in northern Poland on the structure of associated bottom invertebrates – elements that monitor the cond...
Autori: Anca Balan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27342

The Strategy of Waste Management, Horizon 2014-2020, states 8 major objectives with the role of establishing new priorities for Waste Management. Thus, one of the proposed measures for the next 5 years is encouraging the wastes exploitation for energy recovery. In this context, the main goal of our study was to evaluate the level of pollution considering 5 closed municipal waste dump sites from the North-East region of Romania over the period 2013-2015, having in mind at a first glance, the poss...
Autori: Brînduşa Mihaela Slușer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27347

The paper presents results obtained by analysis of some soil and wastes samples in order to establish the heavy metal (HM) content from these samples. The analyzed wastes were sewage sludge from municipal waste treatment and hydrotechnical basin sludge. These types of wastes were mixed with soil from Oltenia Sub-Carpathian area, obtaining the substrates useful for different types of plants. It was studied the migration potential of the metals from substrate to apple trees, the results being comp...
Autori: Cristian Predescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27476

Due to its traditions and landscape characteristics, Romania has unique ecological advantages (e.g. diverse bioregions, unique habitats, flora and fauna diversity, large areas and functional land-use of semi-natural habitats) that need to be considered in nature conservation. Much of the biodiversity-rich habitats are in cultural landscapes, as well. This paper providing a review of how conservation policy evolved in Romania and how Romania managed to integrate components such as biodiversity co...
Autori: Klára Benedek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27533

The changing characteristics of vegetation carbon patterns in the karst region of northwest Guangxi, China and their impact factors were analyzed on the basis of vegetation inventory data from 2005 to 2010. A radial basis function network model (RBFN) was constructed using data from 1377 samples and 13 environmental factors. The results for the 5-year study period were as follows: (1) The total carbon storage of vegetation had increased with an annual growth rate of 1.84% and the carbon density ...
Autori: Mingyang Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27692

The coal gas is a potential risk for the safety production in coalmines. The practical experiences in coalmine show that the gas may suffer massive desorption and migration after coal seam mining and deformation of overlying strata. Therefore, gas extraction in mines focuses on mining ground pressure relief gas extraction. In this paper, the study is carried out on gas permeability and migration pathway based on movements of overlying strata over the working face and the spatial location of t...
Autori: Jianwei Cheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28019

The paper represents a multidisciplinary investigation of the relation between seismicity, active stress field and geological structure for the West of Romania. The study is based on revised and updated catalogues of earthquakes (3572 events) and focal mechanisms (89 solutions). The large spatio-temporal variations of the stress tensor parameters, b-value (b=0.74-0.81) and fractal dimensions of seismicity (D=1.05-2.34) highlight both clustering patterns along active fault systems and scattere...
Autori: Eugen Oros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28188

The migration of methanogen in coal seams have great significance to study the improvement of coal bed gas (CBM) production by injecting microorganisms.This study aims to identify the migration characteristics of methanogens in different rank coals. Methanobacteria migration test was carried out by using coal samples of different particle sizes in the different rank coals. The results show that the maximum relative bacterial absorbance of a Qianqiu mine 18-35 mesh sample was 0.68, higher than th...
Autori: Hao Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28236

Growth of city population and migration of communities lead to higher accumulation of heavy metals in coastal areas of the Caspian Sea suburbs. In the present study there are represented geographical and ecological locations and environmental monitoring results of the Caspian Sea offshore and coastal area near Akshukyr (Aktau suburbs). The shallow offshore near Aktau city and adjacent areas were monitored in cooperation with the Institute of Ocean Sciences. Sea water analysis carried out specia...
Autori: Nurgul Janaliyeva
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28263

Taking the sandy aquifer intruded by seawater in the lower reaches of Dagu River as the research object, the samples of underground freshwater, seawater and aquifer media were collected, and their composition and properties were determined. The seepage device was used to simulate the displacement process of seawater and freshwater. The relationship between permeability change of aquifer and hydrologic-geochemical action was studied. The mechanism of water sensitivity was explained by a hydrologi...
Autori: Jiaguo Ren
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28281