An ecological risk assessment for heavy metals of the lead-zinc ore tailings

查看全文 作　　者：Peng [1,2]Huibing;Liu [1]Yunguo;Li [3]Jun;Liu [2]Meiying

机构地区：[1]College of Environmental Science and Engineering,Hunan University,Changsha 410082,P.R.China;[2]Department of Chemistry and Chemical Engineering,Hunan Institute of Technology,Hengyang 421001,P.R.China;[3]School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411003,P.R.China

出　　处：《Ecological Economy》索引2007年第3卷第2期,共8页

基　　金：This work is supported by Chinese National Programs for High Technology Research and Development (Grant No. 2001AA644020);Natural Science Foundation of Hunan Province (Grant No. 04JJ3013). 摘　　要：The structure of Pb, Zn, Cu and Cd in lead zinc ore tailing soils in Yongzhou, Hunan is analyzed by the optimized BCR sequential extraction procedure. The content and proportion of heavy metals of the mine are measured. Meanwhile, the ecological risks are evaluated with the Lars Hakanson’s potential ecological risk exponential method. The analysis shows that the content of heavy metals is very high, reaching the level of serious pollution. The order of metal pollution degrees are Cd>Pb>Cu>Zn. On the other hand, it is very possible that the heavy metals may combine together as compounds or cling to the crystal form of clay. Since the form of soluble acid and free metals are very little, it is not an easy job for metal eluting or restoration of plants. Yet it is possible to take out those heavy metals adopting the chemical extraction technology. DTPA and EDTA, indicated by a research, both have iterative value and strong conformity effect. So they are effective elutriants to restore the polluted soil. A chemical extraction method is put forward in this paper. 关键词：生态经济重金属产业矿业经济发展

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An ecological risk assessment for heavy metals of the lead-zinc ore tailings

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