南方某河流型饮用水源地重金属健康风险评估

对南方某河流型饮用水源地水中重金属含量进行调查研究,并应用美国环保局推荐的健康风险评价模型对其进行健康风险评价。结果表明,该饮用水源地水中重金属类污染物健康风险值相对较低,其中重金属类致癌污染物的健康风险均值大小顺序为CrAsCd,其值分别为8.19×10-6、2.11×10-6、1.59×10-7a-1,Cr、As的风险值高于瑞典、荷兰、英国推荐的最大可接受水平(1×10-6a-1),而低于国际(ICRP)与美国环保局的健康风险可接受水平(5×10-5a-1和1×10-4a-1),成为该饮用水源地的主要致癌污染因子。重金属类非致癌污染物的健康风险均值大小顺序为CuNiZn,其值分别为1.95×10-10、1.19×10-10、5.73×10-12a-1,均远远低于致癌污染物的健康风险值。

Health Risk Assessment Practice of Heavy Metals in a Southern River Drinking Water Source

The heavy metal content of a Southern River drinking water source was investigated, using the United States Environmental Protection Agency recommended model for health risk assessment. The results showed that the risk value of heavy metal pollutants in the source of drinking water health is relatively low and the carcinogenic pollutants are Cr>As>Cd, with 8.19×10^-6,2.11×10^-6,1.59×10^-7 a^-1. The risk of Cr and As value were higher than that of Sweden, Holland, UK recommended maximum acceptable level (1×10^-6 a^-1), but lower than the International (ICRP) and the United States of America (US EPA) health level of acceptable risk (5×10^-5 a^-1and 1×10^-4 a^-1). Cr, As become the main carcinogenesis of the drinking water source.The health risk of non-carcinogeric in heavy mental Cu>Ni>Zn, with the value 1.95×10^-10,1.19×10^-10, 5.73×10^-12 a^-1, are far less than the value of health risk of carcinogenic pollutants.