中文摘要：

以保定市3个市区的居民生活饮用水为研究对象,对其中Mn、Cu、Zn、As、Cd、Hg、Pb等重金属离子的含量进行了调查研究,并采用我国《生活饮用水卫生标准》（GB5749—2006）和目前美国环保署（EPA）推荐的健康风险评价模型对各市区饮用水中重金属所引起的健康风险进行了初步评价.结果表明,保定市各市区饮用水中重金属平均浓度范围分别为Mn：5.31—13.7μg·L-1,Cu：3.24—7.46μg·L-1,Zn：96.3—107μg·L-1,As：0.72—0.78μg·L-1,Cd：0.03—0.05μg·L-1,Hg：1.69—1.79μg·L-1,Pb：0.26—1.16μg·L-1,均未超出《生活饮用水卫生标准》.通过饮水途径所致健康风险中,As在北市区所引起的致癌风险最大（5.3×10-6a-1）,Cd在新市区的致癌风险最大（1.4×10-7a-1）,但均低于国际辐射防护委员会（ICRP）推荐的通过饮水途径最大可接受风险水平（5.0×10-5a-1）;在保定市通过饮水途径引起的非致癌健康风险中,Zn的风险最大,Hg次之,但两者风险水平均在10-6—10-8之间,也低于ICRP推荐的最大可接受水平.此外,研究还表明大部分给水管材及其使用年限对水中重金属浓度影响不大.

英文摘要：

Concentrations of Mn, Cu, Zn, As, Cd, （South District, North District and New District） of Hg, Pb in drinking water from three districts Baoding City were measured based on a total of 56 random samples. Health risk of the seven metals in drinking water was assessed using USEPA health risk assessment model. The results showed that the concentrations of the heavy metals ranged from 5.31 to 13.7 μg.L-1 for Mn, 3.24 to 7.46 μg.L-1 for Cu, 96.3 to 10μg.L-1 for Zn, 0.72 to 0.78 μg.L-1 for As, 0.03 to 0.05 μg.L-1 for Cd, 1.69 to 1.79 μg.L-1 for Hg, 0.26 to 1.16 μg. L-1 for Pb. Among the health risk caused by the carcinogens in drinking water, the highest risk associated with As is in North District （5.3 × 10-6a-1 ） and that with Cd is in New District （ 1.4 ×10-7 a-1）, but both were significantly lower than the maximum allowance levels recommended by ICRP （5.0 × 10-5a-1 ）. Among the non-carcinogenic risks in drinking water, the highest risk was associated with Zn, followed by Hg. The non-carcinogenic risks levels ranged from 10-6to 10-s, much lower than the maximum allowance levels recommended by ICRP. The results also indicated that the age of water pipe has little impacts on the concentrations of the heavy metals in drinkingwater.