Heavy metal(loid) pollution in mine wastes of a Carlin-type gold mine in southwestern Guizhou, China and its environmental impacts

查看全文 作　　者：Ping [1]Li;Junfang [2]Zhang;Jianxu [1]Wang;Zhonggen [1]Li

机构地区：[1]State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry, Chinese Academy of Sciences;[2]Guizhou Provincial Key Laboratory of Water Pollution Control and Resource Reuse

出　　处：《Chinese Journal Of Geochemistry》索引2015年第34卷第3期,共9页

基　　金：funded by the West Light Foundation of the Chinese Academy of Sciences;the Social Development Project of Guizhou Province (2012–3044);the Natural Science Foundation of Guizhou Province (2009–2003);the National Natural Science Foundation of China (21007068 and 41373135) 摘　　要：Mercury pollution resulting from artisanal gold mining is a serious environmental problem in many developing countries. In this study, we analyzed heavy metal(loid) contamination in mine wastes from a Carlin-type gold mine in southwestern Guizhou, China. Highly elevated levels of As, Hg, Tl, Sb, and Cd—up to 5844, 28,29, 581 and 3.0 mg/kg, respectively—were observed in the mine wastes, but no significant accumulation of Cr, Ni, Cu,Zn, and Pb was found. The smelting process of gold ores had significant impacts on the enrichment of As, Tl, and Hg in the mine wastes. Due to the significant metal(loid)pollution in this gold mine, the ecological risks are classified as ‘‘very high.'' Hg and As are the major pollutants with a relative contribution of 55.9 % and 24.2 % to the risk index, respectively. Phytoremediation could be used to reduce heavy metal contamination and recycle the gold simultaneously. Hg–As–Tl pollution should be considered in gold extraction at Carlin-type gold mines. 关键词：卡林型金矿重金属污染废弃物污染发展中国家矿山废弃物西南部环境影响贵州

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Heavy metal(loid) pollution in mine wastes of a Carlin-type gold mine in southwestern Guizhou, China and its environmental impacts

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