Soroush Modabberi; Y. Rahimsouri; A. Yaghubpur; S. Alipour
Abstract
Black shales of the abandoned antimony mine of Aq-Darreh Bala Village in northwest of Takab city, northwest Iran, contain high concentrations of toxic elements, especially As (4403–11883 ppm), Sb (405–1022 ppm) and Hg (30–58 ppm). Enrichment factor calculations revealed that some ...
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Black shales of the abandoned antimony mine of Aq-Darreh Bala Village in northwest of Takab city, northwest Iran, contain high concentrations of toxic elements, especially As (4403–11883 ppm), Sb (405–1022 ppm) and Hg (30–58 ppm). Enrichment factor calculations revealed that some trace elements including As, Sb, Hg, Zn, U, Sr, Ni, V, Co, Cu, Mo, Ni, and Zr have been depleted, while, Pb, Th, Ga, Rb, and Ta are enriched during weathering. Mass balance calculation results show the highest release percents (% loss) belongs to Cd, Zn, U, Sr, Ni, V, Cu, As, Mo, Tl, Zr, Hg and Sb respectively. The highest weight amount of released elements belongs to As, Sb, Sr, Zn, Ni, V, Zr, Cu, U, and Hg respectively. As a result, it can be concluded that the black shale outcrops in the Aq-Darreh Bala abandoned antimony mine area have a main role as a geogenic source in environmental contamination of downstream environments.
Y. Rahimsouri; A. Yaghubpur; S. Modabberi
Abstract
The results of physicochemical parameters (pH, Eh, EC, TDS, TH, TA, T, and Salinity) and chemical analyses of the springs and drinking water samples of the study area indicate obvious variation compared to each other. Based on these results, the minimum pH and maximum of TDS, EC, salinity, total hardness(TH), ...
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The results of physicochemical parameters (pH, Eh, EC, TDS, TH, TA, T, and Salinity) and chemical analyses of the springs and drinking water samples of the study area indicate obvious variation compared to each other. Based on these results, the minimum pH and maximum of TDS, EC, salinity, total hardness(TH), total alkalinity(TA) parameters and cations and anions, major and trace elements (especially As and Sb) concentrations in spring water samples belong to spring Aq.D1-1(located downstream of Aq-Darreh Bala abandoned antimony mine) and spring Sp.5 (downstream of tailing dams of Aq-Darreh Au mineral processing unit) samples, and the drinking water samples of the Aq-Darreh Paeen village ( spring D.W.P). The Aq-Darreh Paeen drinking water, supplied from the spring near the village, outpoured from the mineralized travertine. Compare to the international standards, main cations and anions concentrations and physicochemical parameters values (exception total hardness) of the springs and drinking water samples are located in permissible ranges. While, Aq-D1-1, Sp.5 and W.D.P springs water samples are polluted regarding to total hardness value and As concentration. Based on the geological map of the study area and location of the all spring water samples (except spring Sp.5), it can be concluded that the chemical composition of the bed rocks around the springs had the main role in controlling the water quality, and the main cause of Sp.5 water spring contamination is polluted waters leaked from the tailing dams of Aq-Darreh Au mineral processing unit.