| Assessment of heavy metals contamination in soils of Dexing region, Jiangxi Province, China |
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| 作者姓名： | Cuihua CHEN Shijun NI Binbin HE Chengjiang ZHANG |
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| 作者单位： | [1]School of Geosciences, Chengdu University of Technology, Chengdu 610059, China [2]School of Applied Nuclear Techniques ＆ Automatic Engineering, Chengdu University of Technology, Chengdu 610059, China [3]Institute of Geo-Spatial Information Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| 摘 要： | Heavy metal contamination has attracted huge concern due to its toxicity, abundance and persistence in the environment, and subsequent accumulation in soil, sediment and water. Mining is one of the most important sources of heavy metals in the environment. Mining-milling operations and disposal of tailings （the finely ground remains of milled ores） in addition to smelting and metal refining provide significant sources of pollution. Mining and mineral processing in the Dexing region of China have been carried out for over forty years and have contaminated the soils with heavy metals, Many studies were conducted to assess and establish the extent of heavy metal contamination in the soils due to mining. The aim of this work was to assess the environmental impact of mining on soils in the Dexing region and to identify the main factors involved in heavy metals dispersion. A 4800 km^2 study area was assessed with respect to its heavy metals on the basis of the current guideline values. In order to assess the extent of heavy metals contamination resulting from past mining activities in the Dexing region, 919 soil samples were collected and analyzed for As, Hg, Cd, Cr, Zn, Cu and Pb, Heavy metals levels were determined using inductively couple plasma-atomic emission spectrometry and X-ray fluorescence spectrometry. Results of soil samples reported concentrations between 1.790-899 mg/kg for As, 0.034-4.980 mg/kg for Hg, 0.043-8.330 mg/kg for Cd, 10-666 mg/kg for Cr, 25-18500 mg/kg for Zn, 6-1825 mg/kg for Cu, and 16-1312 mg/kg for Pb, respectively. The maximum values of As, Hg, Cd, Cr, Zn, Cu and Pb concentration in soils were up to 60, 33, 41, 7, 185, 52 and 37 times higher than the tolerable level, respectively. Meanwhile, the single-factor pollution index and Nemerow pollution index were used to assess the environment quality of heavy metals contamination.
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| 关 键 词： | 重金属 环境污染 土壤 污染指数 |
Assessment of heavy metals contamination in soils of Dexing region, Jiangxi Province, China |
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| Cuihua CHEN Shijun NI Binbin HE Chengjiang ZHANG.Assessment of heavy metals contamination in soils of Dexing region, Jiangxi Province, China[J].Chinese Journal of Geochemistry,2006,25(B08):27-28. |
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| Abstract: | |
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| Keywords: | heavy metal soil environment contamination pollution index Dexing region |
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