Heavy metals migration in soil in tailing dam region of Shuikoushan, Hunan Province, China

摘要

The nonferrous mining industry in China has been exploiting rich domestic mineral resources in order to sustain rapidly economic and social development.The paper chooses the tailing dam region as the research object in the Shuikoushan,and researches the distribution of Pb,Zn,Cu,Cd,As,Cr,which reveals heavy metal migration regularities in layers from new and old tailing dam region.In addition,this article focuses on making the research of Potential Ecological Risk Index appraisal to the heavy metal contamination level.The results showed that the concentrations of heavy metals in old tailing dam region were much higher than those of in the new tailing dam region.As well,the concentrations of most heavy metal reduced progressively with the soil depth increasing for the new tailing dam region,while the change tendency was inversely for the old one.Potential ecological risk index showed that the potential ecological risks were at low and low to moderate level in tailing dam region.