黄河内蒙古段水体中POPs健康风险评价

为研究黄河内蒙古段水体中持久性有机污染物(POPs)对人体健康产生的潜在危害风险,应用健康风险评价方法,从饮水、皮肤接触和食鱼三条途径,对黄河内蒙古段水体中POPs健康风险进行了初步评价。结果表明:黄河内蒙古段水体中POPs的总致癌风险值为6.94×10-5～19.3×10-5,平均为14.9×10-5,中下游断面(5-17)的总致癌风险值高于USEPA推荐的可接受的致癌风险水平,α-HCH是致癌风险的主要因素;总非致癌风险指数值为13.6×10-4～37.1×10-4,平均为28.4×10-4,低于USEPA推荐的可接受的非致癌风险水平。不同的暴露途径对比表明,食鱼途径是水体中POPs危害人体健康的主要途径,其对人体健康总风险的贡献远大于饮水和皮肤接触。

Health risk assessment on POPs in water of Inner Mongolia reach of Yellow River

In order to investigate potential risk to human bodies caused by Persistent Organic Pollutants(POPs) in water of Inner Mongolia reach of Yellow River,a preliminary assessment of heath risk caused by ingestion from drinking water,dermal contact and fish consumption was performed by using the health risk assessment method.The study results show that the total carcinogenic risk value varies from 6.94×10-5 to 19.3×10-5 with an average of 14.9×10-5,and the carcinogenic risk value of the middle and lower sections of Yellow River(5-17) is higher than the acceptable value recommended by U.S.Environmental Protection Agency(USEPA) with the greatest carcinogenic risk being caused by α-HCH.At the meantime,the total non-carcinogenic risk index value varies from 13.6×10-4 to 37.1×10-4 with an average of 28.4×10-4,which is lower than the acceptable value recommended by USEPA.In conclusion,the comparison of different routes of exposure shows that fish consumption is the main way of POPs pollution endangering the human health,its contribution to the total risk is much higher than drinking water and dermal contact.