Study on Soil Heavy Metals Contamination for the Neighboring Areas of a Lead Refinery

摘要

The contents of Pb,Cd,Cr,As,Hg were investigated in the neighboring areas of a lead smelting enterprise and the soil metals contamination was evaluated with the methodologies of the single factor index and Nemerow Integrated Index.The results show that:the content of heavy metals in the neighboring areas has no obvious difference from the reference points; the soil heavy metals contamination varies by the elements,the contamination index follows the pollution order:Cd＞Hg＞Cr＞As＞Pb.The pollution degree of Cd is at high level and Hg at low level,but Cr and As reached the warning level.Therefore,the lead smelting enterprises should not only control lead but also the other heavy metals like Cd.