锌废渣周边土壤重金属污染特征和风险评价

Characterization and risk assessment of heavy metals pollution in the surrounding soil of zinc waste residue

为了解某锌废渣堆场周边农用地土壤重金属污染状况,采集土壤样品,运用单因子和内梅罗综合污染指数法,潜在生态危害指数法,对研究区农用地土壤中8种重金属(Pb、Cd、Ni、As、Hg、Cu、Cr、Zn)进行污染特征分析和风险评价。结果表明:研究区的Pb、Cd、As、Cu、Zn受到不同程度重金属污染。研究区潜在生态危害等级为极强和强危害,Zn和Pb的危害系数比较大。

In order to understand the pollution status of heavy metals in agricultural land around a zinc waste residue dump,soil samples were collected.The pollution characteristics and risk assessment of eight heavy metals(Pb,Cd,Ni,As,Hg,Cu,Cr,Zn)in agricultural land soil in the study area were analyzed by single factor and Nemero comprehensive pollution index method and potential ecological risk index method.The results showed that Pb,Cd,As,Cu and Zn in the study area were polluted by heavy metals to varying degrees.The potential ecological hazard level in the study area was extremely high and high hazard,with Zn and Pb having larger hazard coefficients.