Preliminary health risk assessment of heavy metals in drinking waters in Baoding City
Preliminary health risk assessment of heavy metals in drinking waters in Baoding City
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DOI：
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发表时间：
2014
影响因子：
4.3
通讯作者：
Yang Yan
中科院分区：
文献类型：
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作者：
Yang Yan
对保定市3个区（南区、北区和新区）56个水样进行了Mn、Cu、Zn、As、Cd、Hg、Pb的含量测定。采用USEPA健康风险评价模型对饮用水中7种重金属的健康风险进行了评价。结果表明，重金属的浓度范围为5。三十一比十三7 μg·L-1。二十四比七。46 μg·L-1; 96. 3 ~ 107 μg·L-1; 0. 72比0 78 μg·L-1; 0. 03比0 05 μg·L-1。69比1 79 μg·L-1; 26比1 16 μg·L- 1。在食水致癌物对健康的风险中，北区的砷风险最高（5。3 × 10- 6a- 1），Cd污染区为新区（1. 4 × 10- 7a- 1），但均显著低于ICRP推荐的最大允许值（5. 0 × 10- 5a- 1）。在饮用水的非致癌风险中，锌的风险最高，其次是汞。非致癌风险水平为10- 6 ~ 10- 8，远低于ICRP推荐的最大允许水平。结果还表明，水管年龄对饮用水中重金属浓度的影响不大。
Concentrations of Mn,Cu,Zn,As,Cd,Hg,Pb in drinking water from three districts( South District,North District and New District) of 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- 1for Mn,3. 24 to 7. 46 μg·L- 1for Cu,96. 3 to 107 μg·L- 1for Zn,0. 72 to 0. 78 μg·L- 1for As,0. 03 to 0. 05 μg·L- 1for Cd,1. 69 to 1. 79 μg·L- 1for 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- 7a- 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- 8, 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 drinking water.