淮南潘集矿区土壤重金属污染及生态风险评价

Pollution and Potential Ecological Risk Assessment of Soil Heavy Metals in Huainan Panji Mining Area

以淮南潘集矿区为研究区域,分别采集该区域煤矸石充填复垦地和未沉陷农田土壤样品,分析Pb、Cd、Cr、Zn、Cu、As、Hg 7种重金属元素含量,并在此基础上对土地受重金属污染程度和由此产生的潜在生态风险进行了评价。结果表明:煤矸石充填复垦地与未沉陷农田的土壤重金属含量没有显著差异,复垦后不同土地利用方式下各重金属指标也不存在显著差异;7种重金属含量间无显著正相关关系,推测无明显同源性;研究区域内普遍存在Zn、Cr复合污染现象,单因子污染指数Zn>Cr>Cd>As>Cu>Pb>Hg,综合污染程度介于重度污染和中度污染之间;潘集矿区复垦土地和未沉陷农田土壤中全部7种重金属元素的潜在生态危害系数均小于40,属于轻微生态危害。

Samples collected in reclamation land of Panji mining area and normal farmland were analyzed on the concentration of 7 heavy metals （Pb, Cd, Cr,Zn, Cu, As, Hg）in the soils, and evaluated the degree pollution o differences The heavy of heavy metal pollution on the land and the potential ecological risks resulting from the n the basis of analysis of the samples. Results indicate that there were no significant in the heavy metals contents between reclaimed soil filled with gangue and normal farmland. metal content in the soils under different land use patterns after reclamation had no which were less than 40.