三峡库区水环境多环芳烃和邻苯二甲酸酯类有机污染物健康风险评价

为研究三峡库区水环境中持久性有机污染物(POPs)对人体健康产生的潜在危害风险，在介绍健康风险评价方法的基础上，建立了水环境健康风险评价模型，根据三峡库区水质监测资料对水源水主要持久性有机物多环芳烃和邻苯二甲酸酯类污染进行健康风险评价. 结果表明，在所评价断面中，长江和嘉陵江汇合的寸滩断面污染较严重，健康危害的风险相对较大. 水源水6种持久性有机污染物由饮水途径所致健康危害的个人年风险为2.79×10-10～4.44×10-13 a-1，按年风险大小依次为DEHP＞DBP＞Pyr＞NA＞FLA＞DEP；有机污染物对健康危害的年总风险仅为3.70×10-10 a-1，远低于国际辐射防护委员会(ICRP)推荐的最大可接受值(5.0×10-5 a-1). 三峡库区水体中6种POPs污染所致的健康危害年风险度目前还处于很低水平，但应引起管理部门的重视. 

Water Environmental Health Risk Assessment of PAHs and PAEs in the Three Gorges Reservoir

In order to explore potential healthy hazards of persistent organic pollutants (POPs) in the Three Gorges reservoir, a water environmental health risk assessment model was established based on an introduction of the health risk assessment method. According to the water quality monitoring data in the Three Gorges reservoir area, a health risk analysis was performed for main organic pollutants (PAHsand PAEs) in the source water. The results showed that the most heavily polluted section located in Cuntan area among all the sampling sections and might have higher health risk. The health risk to the individual person per year in terms of 6 kinds of organic pollutants through drinking is from 2.79×10-10 to 4.44×10-13 a-1, with the greatest health risk being caused by DEHP, followed by DBP, Pyr, NA, FLA and DEP. The total health risk caused by the main organic pollutants was 3.70×10-10 a-1, far lower than the maximum tolerable value (5.0×10-5 a-1) recommended by ICRP. Although the environmental health risk caused by POPs was currently in low level, it should be paid more attention by our environment protection management.