演马矿矸石山周围土壤中重金属污染评价

Soil Pollution Evaluation with Heavy Metals around Yanma Gangue Dump

在对演马矿矸石山周围土壤重金属污染调查的基础上,使用火焰原子吸收分光光度法对矸石山周围的表层土壤的13个土样进行重金属(Cd,Cr,Zn,Pb,Cu)含量的测定,分别采用单因子指数法、内梅罗综合污染指数法,对土壤重金属污染状况进行评价.结果表明:5种重金属的平均含量均大于其背景值,Pb和Cu为安全级,而Cd,Cr,Zn均处于警戒级以上.综合污染指数顺序为:Zn>Cr>Cd>Cu>Pb.

Based on investigation of heavy metals pollution in soils around Yanma Gangue Dump, the degree of heavy metal pollution in soils is evaluated with different evaluation methods and evaluation standards.Flame atomic absorption spectrophotometry method is employed to measure the heavy metals （Cd,Cr,Zn, Pb,Cu） of 13 soil samples around Yanma Gangue Dump. The results indicate that the average content of these heavy metals in the soil exceeds the background value. The pollution of Pb and Cu is at safe-grade degree, while others are at warning-grade degree. The order of comprehensive pollution index is Zn〉Cr〉Cd 〉Cu〉Pb.