[Preliminary health risk assessment of heavy metals in drinking waters in Beijing].
[Preliminary health risk assessment of heavy metals in drinking waters in Beijing].
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发表时间：
2004-03
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通讯作者：
Ji-jun Gao;Li-ping Zhang;Sheng-biao Huang;M. Ma;Zi-jian Wang
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作者：
Ji-jun Gao;Li-ping Zhang;Sheng-biao Huang;M. Ma;Zi-jian Wang
通过对北京市8个区、10个县（市、区）120个水样的调查，研究了饮用水中Cu、Hg、Cd、As的浓度分布。采用USEPA健康风险评价模型对饮用水中4种重金属的健康风险进行了评价。结果表明，北京市饮用水中重金属含量范围为：Cu 0.81 ~ 6.96 μ g·L ~（-1），Cd 0.34-0.82 μ g·L ~（-1），Hg 0.10-0.74 μ g·L ~（-1），As 0.19-3.02 μ g·L ~（-1）。在饮用水致癌物的健康风险中，As的风险最大值应在通州县（2.0 × 10（-5）·a-1），Cd的风险最大值应在昌平县（2.3 × 10（-6）·a-1），但均显著低于ICRP推荐的最大允许值（5 × 10（-5）·a-1）。在饮用水的非致癌风险中，最大的风险是与汞有关的风险，其次是铜。非致癌风险水平从10（-8）到10（-9）不等，远低于ICRP建议的最大允许水平。
Concentrations distribution of the Cu, Hg, Cd, As in drinking water in the 8 city districts and 10 counties in Beijing was studied based on a total of 120 random samples. Health risks associated with 4 metals in drinking water were assessed using USEPA health risk assessment model. The results showed that the concentrations of the heavy metals in drinking water in Beijing ranged from 0.81 to 6.96 micrograms.L-1 for Cu, 0.34-0.82 microgram.L-1 for Cd, 0.10-0.74 microgram.L-1 for Hg and 0.19-3.02 micrograms.L-1 for As. Among the health risks caused by the carcinogens in drinking water, the largest risk associated with As should be in Tongzhou County (2.0 x 10(-5).a-1) and that with Cd should be in Changping County (2.3 x 10(-6).a-1), while both were significantly lower than the maximum allowance levels recommended by ICRP(5 x 10(-5).a-1). Among the non-carcinogenic risks in drinking water, the largest risk was the risk associated with Hg, followed by Cu. The non-carcinogenic risks levels ranged from 10(-8) to 10(-9), much lower than the maximum allowance levels recommended by ICRP.