| Distribution and behavior of heavy metals in a river polluted by acid mine drainage in the Dabaoshan mine area, China |
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| 作者姓名： | Xingchun DUAN Zhi DANG Jianmin ZHOU Xiaoyun YI |
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| 作者单位： | [1]College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China [2]Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangdong Institute of Eco-Environment and Soil Sciences 510620, China |
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| 摘 要： | Acid mine drainage （AMD） has been recognized as a major environmental pollution problem over past decades. This pollutant effluent is complex and is characterized by elevated concentrations of iron and sulfate, low pH, and high concentrations of a wide variety of metals depending on the host rock geology. Massive inadvertent discharges from acid mines have given rise to dramatic cases of ecological damage. These events indicate an improved understanding of the mechanism controlling metal transport to the river is important, since the aquatic ecology will be affected, to some degree, dependent on the phase （dissolved or particulate） in which the metal is transported. In this study, polluted water samples were collected along the Hengshi River near the Dabaoshan mine, Guangdong, China, in April 2005. The concentrations of dissolved Cu, Zn, Cd and Pb have been determined using ICP-MS and the chemical speciation of those metals in suspended particles was examined using BCR methods and SEM/EDX mineralogical analysis. Combining these two sets of data, the intention was to develop geochemical concepts, which explain the behavior of Cu, Zn, Cd and Pb in particle-water interactions of heavy metals in AMD. The results show that the dissolved heavy metals exhibited non-conservative behavior in the Hengshi River. The dissolved and particulate Cu, Zn, Cd and Pb have the similar spatial distribution, which decreased gradually along the river except in the lower reaches because of the absorption-desorption between dissolved and particulate phases. Although the metal concentrations in both phases were elevated, dissolved metals were dominant and had the maximum concentrations in the low pH region.
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| 关 键 词： | 矿山酸性排水 矿区 重金属 水体污染 河流 |
Distribution and behavior of heavy metals in a river polluted by acid mine drainage in the Dabaoshan mine area, China |
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| Xingchun DUAN Zhi DANG Jianmin ZHOU Xiaoyun YI.Distribution and behavior of heavy metals in a river polluted by acid mine drainage in the Dabaoshan mine area, China[J].Chinese Journal of Geochemistry,2006,25(B08):34-35. |
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| Abstract: | |
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| Keywords: | acid mine drainage mining area release and transport speciation distribution suspended particle |
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