黄山市城市表层土壤重金属环境质量及人为污染评价

Environmental Quality and Anthropogenic Pollution Assessment of Heavy Metals in Urban Topsoil of Huangshan City

以黄山市城区(屯溪区、徽州区、经济开发区)和城郊的表层土壤为研究对象,参照土壤环境质量标准(GB15618-1995),采用单项污染分指数法和内梅罗综合污染指数法对区内表层土壤重金属(As、Cd、Cr、Cu、Hg、Ni、Pb、Zn)环境质量进行了评价;根据重金属元素的环境地球化学行为,采用改进的富集因子评价了土壤重金属人为污染现状。结果表明:研究区土壤环境质量良好,一、二级土壤面积分别占全区的21.91%、75.44%;有相当大的区域发生了人为污染,并以轻微污染为主。

Taking the urban and suburb areas （Tunxi, Huizhou district and Economic and Technological Development area） in Huangshan City, the topsoil environmental quality of the heavy metals was evaluated with the single pollution index method and nemerow pollution index based on Environmental Quality Standard for Soils （GB15618-1995）. Making use of environmental geochemical behaviors of heavy metals, the anthropogenic pollution of heavy metals was assessed by using modified enrichment factor. The results showed that the environmental quality of study areas were good, in which the first and second grade soil area accounted for 21.91% and 75.44% in total area, respectively. It happened the anthropogenie pollution area of heavy metals in the rather larger areas, but the pollution was mainly light pollution.