贵州省典型铅锌矿区土壤重金属污染状况评价

Evaluation on Soil Heavy Metal Pollution around Typical Lead and Zinc Mining Areas in Guizhou

在贵州DD、DX典型铅锌矿区共采集土壤表层样品27件,针对不同采样点和不同片段的整体研究,采用单因子污染指数法和N.L.Nemerow综合污染指数法对研究区域重金属污染进行研究,结果表明,矿区土壤中重金属污染程度有较大差异,其中Cu、As、Cr等重金属元素无或轻污染;Cd、Zn、Hg、Pb等重金属元素对该区土壤环境已造成污染;2个研究区域土壤中重金属综合污染已相当严重。

The soil heavy metal pollution of the typical lead and zinc mining areas was studied by using single factor pollution index and N. L. Nemerow comprehensive pollution index by analyzing 27 samples of surface soil collected from the typical lead and zinc mining areas according to different sampling sites and parts in Guizhou. The results showed that there was great difference in soil heavy metal pollution degree between different samples and there was no or little pollution of Cu, As and Cr heavy metals but Cd, Zn, Hg and Pb heavy metals had polluted the soils of tested mining areas, which expresses the soil heavy metal comprehensive pollution is relatively serious in two tested mining areas.