徐州矿区充填复垦地重金属污染的潜在生态风险评价

为了保证矿区充填复垦场地健康、稳定和可持续利用，采用Hakanson生态风险指数法对矿区充填复垦地中Hg,Cd,As,Cu,Pb,Cr和Zn等7个污染要素进行了分析，研究了充填复垦地土壤重金属污染程度及潜在的生态危害性.结果表明:煤矸石充填复垦土壤的综合污染指数平均值为32.20，处于很高的污染程度，其生态风险指数为443.21，潜在生态风险为较高；比照地的综合污染指数平均值为21.85，处于较高的污染程度，其生态风险指数为344.65，潜在生态风险为较高；而粉煤灰充填复垦土壤的综合污染程度为17.06，处于较高的污染程度，其生态风险指数为256.96，潜在生态风险为中等.研究区土壤整体处于受污染状态，主要受到Cd和Hg的污染.

Potential ecological risk assessment of filling reclaimed soils polluted by heavy metals in mining area

To keep healthy,steady and sustainable utilization of reclaimed lands by filling mining wastes and fly ash into subsided lands,seven heavy metals including Hg,Cd,As,Cu,Pb,Cr and Zn were analyzed.The potential ecological risk and pollution degree of the heavy metals were evaluated using Hakanson ecological risk index in reclaimed land filled with fly ash and coal gangue.The results show that the entire research area is contaminated by heavy metal,especially by Cd and Hg.The average of composite pollution exp...