昆明市土壤重金属污染评价

对昆明市表层土壤中的8种重金属元素As、Cd、Cr、Cu、Hg、Ni、Pb、Zn的含量以及分布特征进行分析,发现元素的平均含量与中国土壤背景值相比有较大富集,同时采用单因子指数法和内梅罗综合指数法进行污染评价,结果表明昆明市西山区和五华区均存在一定程度的土壤重金属污染问题,盘龙区和官渡区的土壤环境质量较好;结合数据和昆明城市现状对土壤重金属的污染原因进行分析,重金属污染的来源主要是工业污染和交通污染。

Assessment of Heavy Metal Contamination of Soil in Kunming City, China

Contents and distributions of eight heavy metals As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in the topsoil of Kunming City, China were analyzed. Results show that the average concentrations of the eight elements in the topsoil of Kunming City are much higher than the background concentrations in soil in China, and the pollution assessments with the single factor index method and Nemerow pollution index method show that there are certain degrees of heavy metal pollution in soil from Xishan District and Wuhua Districtin Kunming City, while the environmental qualities of soil from Panlong District and Guandu District are better than other districts. The sources of heavy metal pollution are mainly from industrial and traffic pollution.