拉萨某铜铅锌尾矿库周边土壤污染评价

Evaluation of Soil Pollution Around a Copper-Lead-Zinc Tailings Pond in Lhasa

为评价拉萨某铜铅锌尾矿库周边土壤污染特性,采用3种土壤重金属污染评价方法进行了综合评价。结果表明:尾矿库周边土壤中Cu、Pb、Zn含量超标,且Pb超标率最高;土壤中主要污染元素为Pb。生态风险评价表明,Pb为主要危害元素,为中度潜在生态危害,1号点和6号点的潜在生态风险较高,为中度潜在生态风险。可见了距离尾矿库越近,重金属污染越严重,潜在生态风险越高。

In order to evaluate the characteristics of soil pollution around a copper-lead-zinc tailings pond in Lhasa,three soil heavy metal pollution evaluation methods were used for comprehensive evaluation.The results showed that the content of Cu,Pb and Zn in the soil around the tailings pond exceeded the standard,and the excessive rate of Pb was the highest;the main polluting element in the soil was Pb.The ecological risk assessment shows that Pb is the main hazard element,which is a moderate potential ecological hazard.In general,the closer to the tailings pond,the more serious the heavy metal pollution and the higher the potential ecological risk.