AbstractThe purpose of this paper was to quantify the environmental impact and risk applying a new integrated method designed as a soft SAB. The evaluation of impact and risk induced in environment was performed for surface  waters (Bahlui River, IaÂ?i), considering the presence of some minerals and heavy metals in surface water in high concentrations. The new method for integrated environmental impact and risk assessment that considers the pollutants concentration levels in surface water w...
Autori: Brindusa Robu, Dumitru Bulgariu, Laura Bulgariu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25262

Abstract In view of the predicted diamond shortage in 2010, a number of innovative processes have been proposed recovering ...
Autori: Frederike Weijmans, Erwin Bakker, Peter Rem
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25441

Abstract Knowledge of the binding mechanisms of heavy metals to cement minerals is essential for the prediction of the long-term leachability of cement-based solidified waste containing heavy metals. In this paper, the sorption of chromate ions onto calciumsilicate- hydrate (C-S-H) in equilibrated aqueous suspensions was investigated as a function of liquid-to-solid ratio. The hypothesis of super-equivalent adsorption was assumed to be involved in chromate ions immobilization. This hypothesis...
Autori: Constantin Bobirica, Ionel Constantinescu, Liliana Bobirica,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25478

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

AbstractThermal behaviour, microstructure and mechanical properties of the clay polluted by acidic and alkaline pollutants wereinvestigated by thermogravimetric/differential thermal analysis (TG-DTA), scanning electronic microscope (SEM), mercuryintrusion experiments, permeability coefficient and unconfined compressive strength tests. The clay polluted by alkaline solutionpresented distinct exothermic peaks at 304-310oC, while it’s not observed for the one polluted by acidic solution due to thed...
Autori: Zhao Ying
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26182

AbstractZarshuran As-Au deposit is the major ore deposit in northwest of Iran. Having been exposed to weathering, the accumulatedmining waste is consumed to deteriorate regional soil and water quality. Accordingly, 11 composite surface soil samples werecollected to evaluate the metallic pollution. Mean concentration of elements As, Sb, Hg and Zn were measured to be 234.9, 19.6,24.2 and 476.7 ppm, respectively. In comparison with mean earth crust and local guidelines for agricultural soil, the sa...
Autori: Abdolreza Karbassi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26262

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 Based on the study on the reformation of Dawsonite-bearing sandstones with CO2 fluids at different temperature (100oC 200oC and 300oC) and different CO2/H2O/sandstone systems, it is suggested that as the temperature increases, the corrosion intensity of dawsonite-bearing sandstones is gradually increased, but the stability of the sandstone is reduced. The SEM study shows that there are radiated aggregate sediments of boehmite in all samples. At 200oC, with the dissolving of dawsonit...
Autori: Xi-Yu Qu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26814

Abstract To assess the pollutants input of acid mine drainage (AMD) and domestic activities in Aries River, the water was monitored monthly, during one year, in 15 sampling points along the River. The dissolved metals (Ca, Mg, Na, K, Fe, Cu, Zn, Mn), anions (SO42-, NO3- and Cl-), pH and electrical conductivity were analyzed. The obtained data were assessed against the water quality standards, Principal Component Analysis (PCA) and Hierarchical Cluster Analysis. The results revealed the water...
Autori: Erika Andrea Levei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26881

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

The aim of this study was the diversification of fodder yeast assortments with viable economic effects while reducing the pollution to the environment by capitalisation of wastewaters with high monosaccharides content from pulp and paper industry. As inoculum, in the bioreactor, a mixture of two species of yeasts Candida utilis and Candida arboreea (1:1 ratio) was used at 38°C, pH 5.5 and an air flow of 0.02 L/h was insured. Wastewaters from technological process of pulping of softwood wi...
Autori: Andrei I. Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27028

Rapeseed meal (RM) is an abundant and cheap by-product of oil extraction process. RM is a rich source of nitrogen, carbon, and minerals. Thanks to these features, RM has a striking potential for eco-friendly production of high value products in biotechnological processes. In this study, the possibility of using a low-cost medium based on the water soluble fraction of RM for laccase production by the fungus Pleurotus ostreatus has been evaluated and compared with the use of synthetic complex ...
Autori: Lucia Guarino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27129

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

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

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

Magnesium wastes are among the gradually ascending and therefore challenging metal wastes, which are produced by many industrial activities. The purpose of this study is the usage of magnesium waste, a raw material in magnesium borate production by hydrothermal synthesis. Boron sources (boric acid (H3BO3) and boron oxide (B2O3)) react with magnesium wastes in order to synthesize the magnesium borate mineral of admontite (MgO(B2O3)3ꞏ7(H2O)). In addition to the synthesis from waste magne...
Autori: Azmi Seyhun Kipcak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27657

Bottled water (commonly called mineral) makes an important source of minerals for humans. Its consumption has been systematically rising in the highly industrialized countries, even though not every water type has appropriate health properties. As a result, drinking bottled water ought to be supported with understanding its qualities and physicochemical content. The following article presents the results of the research into pH levels, electrical conductivity, selected inorganic anions (F-, Cl-...
Autori: Rajmund Michalski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27693

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

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