江西省某冶炼厂遗留尾砂场重金属污染特征

Evaluation on heavy metal pollution of backfilling fields of a melting factory in Jiangxi

以江西省某冶炼厂生产过程中遗留在厂内各尾砂池中的废渣为研究对象,利用单因子污染指数法和内梅罗综合污染指数法相结合的方法对其重金属污染状况进行评价。结果表明:各尾砂池土壤中铜、锌、镍、砷超标倍数高,且除尾砂池2深层土壤外,其他样点重金属内梅罗综合污染指数均远大于1,显示各尾砂池土壤均为重污染土壤。

By using single -factor pollution index method and Nemerow index method,the paper mainly investigates into the heavy metals（ Pb,Cd,Cu,Zn,Cr,Ni,As）content and pollution on the backfilling fields in a melting factory of JiangXi. The backfilling fields were used to contain waste residue generated from the melting production. The result indicated that all the backfilling fields had a highly standard-exceeding content of Cu ,Zn,Ni,and As in soil. Except the deep soil of back-filling field No. 2,soils in other sampling spots contained heavy metals with their comprehensive pol-lution index higher than 1 ,implying soils in all backfilling fields were seriously contaminated by heavy meatless.