辽宁典型工矿区与污灌区土壤重金属污染状况及原因

Status and Causes of Heavy Metal Pollution of the Soils in Typical Industrial and Mining Areas and Wastewater Irrigation Zones in Liaoning

对辽宁省几个典型工矿区以及污灌区土壤重金属污染状况进行调查研究,结果表明:调查区土壤重金属含量绝大多数高于土壤背景值,尤其工矿区附近土壤Cd、Pb、Cu和污灌区的Cd、Hg的污染状况应该引起足够的重视;重金属元素间存在着一定的伴生规律;土壤中重金属污染物主要来源于工矿开发、废岩、尾矿泥、大气飘尘以及污水灌溉等。

An investigation of soil pollution was carded out in several typical industrial and mining areas and wastewater irrigation zones in Liaoning. The results indicated that concentrations of heavy metals in these sites were higher over the background values. The high concentrations of Cd, Pb, Hg and Cu, in particular, should arouse more concerns since they are already well beyond the criteria set by the Governmental of China for soils of agricultural use. And some companion relationship existed between the various metals. The heavy metals in the soil mainly come along with the untreated wastewater used for irrigation, tailings and slurry from metal ore mining.