【摘要】 通过对南宁市河流型水源地水体中Pb、Cd、Hg、As浓度调查与健康风险评价研究,结果表明:这4种元素在水体中的质量浓度较低,均达到《地表水环境质量标准》(GB 3838-2002)Ⅱ类标准;经饮水途径引起的健康风险从大到小依次为As>Cd>Pb>Hg,说明As是南宁市饮用水源中的主要风险因子;4种元素通过饮水途径引起的平均个人年健康致癌风险值为1.48×10-6a-1~13.75×10-6a-1,非致癌风险值为7.05×10-10a-1,均低于美国环保局和国际辐射防护委员会的推荐值。更多还原

【Abstract】 The concentrations of the Pb,Cd,Hg and As and the health risks in river-type drinking water sources of Nanning were studied.The results indicated that the concentrations of the four elements were better low and were up to the level Ⅱ of Environmental Quality Standards for Surface Water in China(GB 3838-2002).In all this health risks which caused by drinking,the order was As > Cd > Pb > Hg,which showed that As had become the main risk factor in Nanning City’s drinking water sources.The value of the average personal health carcinogenic risk was 1.48 × 10- 6a- 1~ 13.75 × 10- 6a- 1and non-carcinogenic risk 7.05 × 10- 10a- 1,less than the United States Environmental Protection Agency’ s and the International Commission on Radiological Protection’ s recommended value.更多还原