某高锰酸钾生产企业遗留重金属污染调查分析与健康风险评估

Pollution Analysis and Health Risk Assessment of Heavy Metal in a Potassium Permanganate Production Site

以湖南省某高锰酸钾生产企业历史遗留地块为研究对象,通过综合内梅罗指数法,评价地块内土壤重金属污染程度;采用空间插值方法模拟地块污染程度空间分布情况;通过人体健康风险评估模型和ALM模型对地块重金属污染进行风险评价。结果表明:该地块内土壤中主要重金属污染因子有砷、镉和铅,其中砷为主要污染因子。污染区域主要集中在原材料堆存区及生产区,污染深度主要分布在0~0.5 m。土壤污染物砷和镉致癌风险和危害商均不可接受。土壤污染物铅引起成人孕妇胎儿血铅水平超过10μg/dL水平的概率为6.8%,风险不可接受。

The research was based on a potassium permanganate production site located in Hunan Province,evaluated the soil contamination status of heavy metals by Nemerow index method.The spatial distribution of contamination was simulated by using spatial interpolation method.The human health risk of soil contamination of heavy metals was evaluated by human health risk model and ALM model.The results showed that the main heavy metal contaminants in the site were As,Cd,and Pb,and As was the most serious contaminant.The high contaminated areas distributed in raw material and production areas,at the depth of 0~0.5 m.The results of human health risk assessment showed that carcinogenic risk and hazard quotient of As and Cd were unacceptable.And the probability of Pb in soil causing the level of lead in fetal blood exceed to 10 ug/dL in the abdomen of pregnant women was 6.8 %,and was also unacceptable.