细河流域地下水中多环芳烃污染健康风险评价

为了保障细河流域沿岸居民的生活用水安全,采集细河流域9个地下水样品并分析了其中16种多环芳烃（PAHs）的含量,根据毒性当量因子方法和荷兰公共卫生和环境国家研究院提出的土壤地下水污染现场暴露评价模型（CSOIL模型）对多环芳烃的健康风险进行了初步评价。结果表明,细河流域各采样点地下水中∑PAHs含量为159.1～483.7 ng.L-1,低于生活饮用水卫生标准（GB 5749—2006）的浓度限值,表现出规模较大的城镇或乡镇处∑PAHs含量高于其他位置的规律性。作物食入、饮水等经口摄入途径是地下水环境健康风险评价中最主要的暴露途径,各采样点地下水中PAHs在作物食入、饮水、洗澡过程中呼吸吸入和皮肤接触等4种暴露途径产生的总的平均个人年健康风险值为1.19×10-6～3.10×10-5,其健康风险排序为翟家〉前庙〉富官〉前余〉双树〉土西〉大潘〉黄蜡坨〉大兀拉。虽然该风险值低于国际辐射防护委员会（ICRP）推荐的最大可接受值,基本属于可接受范围,但其健康危害已不容忽视。

Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in Groundwater from Xihe River Area,China

In order to protect the safety of water used by the residents along the Xihe River Area,9 groundwater samples along the Xihe were collected,the concentrations of 16 PAHs in samples were analyzed,and a preliminary assessment of the health risk caused by PAHs was performed by CSOIL model of Holland RIVM.Results showed that the total level of 16 PAHs（∑PAHs） in groundwater ranged from 159.1 ng·L-1 to 483.7 ng·L-1,which were below the concentration limits in the Standards for Drinking Water Quality（GB 5749—2006）.And the concentration of ∑PAHs showed higher in the larger town or township than the other locations.Crop ingestion and drinking water were the most important exposure pathway in Health Risk Assessment of groundwater.The total Average Indiviual Annual Health Risks caused by crop ingestion,drinking water,inhalation and demal ingestion in the bathing were 1.19×10-6～3.10×10-5.Health risks at 9 sampling points followed the order：Zhai JiaoQian MiaoFu GuanQian YueShuang ShuTu XiDa PanHuang LatuoDa Wula.Though risks of PAHs at all sampling points were less than the recommended maximum acceptable value of the International Commission on Radiological Protection（ICRP）,the health risks could not be ignored.