平顶山市煤矿区土壤重金属污染程度评价

Evaluation of soil heavy metal pollution in coal mine area of Pingdingshan City

通过测定平顶山市卫东区、石龙区和郏县典型煤矸石山下游土壤中重金属(Hg、Pb、Cd、Cr 6+、As、Cu、Zn、Ni)的含量,利用单因子污染指数法和综合污染指数法,结合河南省土壤环境背景值进行重金属污染评价。结果表明:平顶山市煤矸石山土壤总体综合污染指数为2.09,污染水平为中度污染,污染等级为中污染;单因子污染指数为Cd(2.62)>Hg(1.73)>Pb(1.37)>Cu(1.20)>Zn(1.13)>As(1.0)>Cr 6+(0.89)>Ni(0.88),郏县、石龙区、卫东区的综合污染指数分别为3.09、1.62和1.55。

By determining the content of heavy metals(Hg,Pb,Cd,Cr 6+,As,Cu,Zn and Ni)in the soil of typical gangue hills in Weidong District,Shilong District and Jia County of Pingdingshan City,heavy metal pollution was evaluated based on the environmental background values of soil in Henan Province using single factor pollution index method and comprehensive pollution index method.The results showed that the overall comprehensive pollution index of gangue hill soil in Pingdingshan City was 2.09.The pollution level and grade were moderate.The single factor pollution indexes were Cd(2.62)>Hg(1.73)>Pb(1.37)>Cu(1.20)>Zn(1.13)>As(1.0)>Cr 6+(0.89)>Ni(0.88).The comprehensive pollution indexes of Jia County,Shilong District and Weidong District were 3.09,1.62 and 1.55,respectively.