【摘要】 目的调查长江航道工程水域范围内取水口有害元素污染情况,评价饮用水源地有害元素的健康风险性,从环境健康风险角度提出长江航道工程安全管理措施,有利于航道工程施工期水源地保护。方法基于2013-2014年长江中游荆江航道整治工程水域范围内饮用水源水中有害元素:汞（Hg）、铬（Cr）、镉（Cd）、砷（As）监测数据,应用美国环境保护署（EPA）推荐的健康风险模型,计算、分析、评价荆江航道整治工程水域内取水口周围水中有害元素的健康风险性。结果荆江航道工程水域范围饮用水源地水中Hg非致癌风险危害商（HQ）<1,Cr、Cd致癌风险水平<10-6,均处于可接受水平;As是主要风险因子,致癌风险水平在3.27×10^-5/年⁷.95×10^-5/年,个别超过国际辐射防护委员会（ICRP）推荐的可接受值(5.0×10^-5/年),但As含量低于中国《生活饮用水卫生标准》（GB5749-2006）、WHO和美国As限值（10μg/L）,视为安全。结论 Hg、Cr、Cd、As等有害元素应作为长江航道工程水环境风险监测重点指标。以饮用水健康风险评价作为工程水源地安全监测依据,由此提出长江航道施工期取水口安全保护措施,并为长江航道工程饮用水安全保障提供数据和理论参考。更多还原

【Abstract】 Objective The aim of this study was to combine the protection of the water intake from the Yangtze River waterway during construction period and the health risk assessment of drinking water,in order to put forward the safety management from the perspective of health risk,which would be beneficial to the protection of the water source of the Yangtze River waterway engineering.Methods The water environmental health risk in the water outlets of urban waterworks in Jingjiang Channel Regulation engineering was calculated,analyzed and evaluated based on the monitoring data of toxic element such as mercury（Hg）,chromium（Cr）,cadmium（Cd） and arsenic（As） in the source water within the water area of the Jingjiang Channel Regulation Project in the middle reaches of the Yangtze River from 2013 to 2014,and the health risk model was recommended by the United States Environmental Protection Agency（EPA）.Results The non-carcinogenic risk hazard quotient（HQ） of Hg in drinking water of Jingjiang waterway engineering water source was <1.The carcinogenic risk of Cd and Cr was lower than that of As,which was at an acceptable level（the order of magnitude was <10-6）.The main health risk factor and carcinogenic risk level was ranged from 3.27 ×10^-5/a to 7.95 ×10^-5/a.The carcinogenic risk levels of very few water intakes exceeded the recommended acceptable value(5.0×10^-5/a) recommended by the International Commission on Radiological Protection（ICRP）,but lower than the limit（10μg/L） recommended by " drinking water quality standard " of China（GB5749-2006）,WHO and the United States,which was considered as safe.Conclusion Toxic element should be the focus of the monitoring and management of water environment health risks in the Yangtze river waterway engineering.Health risk management of drinking water should be used as the monitoring and evaluation conditions for the waterway wharf construction project,and the safety protection measures for the water intake of the Yangtze river waterway during the construction period should be proposed which can provide scientific basis for water safety of the Yangtze river waterway engineering.更多还原