河北环境工程学院学报

为了解某退役工业用地现状,采用地累积指数法、潜在生态危害指数法及健康风险评估法开展场地重金属污染和人体健康风险评价。结果表明:研究区土壤重金属Cd、Ni含量高于土壤背景值,存在富集现象;由地累积指数(I_geo)可知,场地处于无污染状态;由潜在生态风险指数(E_i)可知,重金属Cu、Cd、Pb、Ni、As处于低污染状态,重金属Hg处于中度污染状况;由潜在生态风险指数(RI)可知,场地处于低污染状态;由总致癌风险(CR_n)与总危害指数(HI_n)可知,场地土壤中Cd、Ni、As、Cu、Hg等重金属各暴露途径对人群产生的整体健康致癌风险较低。

In order to understand the current situation of a retired industrial land, the land accumulation index method, the potential ecological hazard index method and the health risk assessment method are used to carry out site heavy metal pollution and human health risk assessment. The results show that the content of heavy metals Cd and Ni in the soil in the research area is higher than the soil background value, and there is an enrichment phenomenon; the land accumulation index(I_geo) shows that the site is in a pollution-free state; the potential ecological risk index(E_i) shows that the heavy metals Cu, Cd, Pb, Ni and As are in a low-pollution state, and heavy metal Hg is in degree of pollution, the comprehensive potential ecological risk index(RI) shows that the site is in a state of low pollution; combined with the total carcinogenic risk(CR_n) and the total hazard index(HI_n), the overall health carcinogenic risk of the population is low for the exposure of Cd, Ni, As, Cu, Hg and other heavy metals in the soil of the site.