遂宁城乡集中式饮用水水源地钡分布特征及健康风险评价

发布时间：2018-06-22 12:59

本文选题：重金属 + 钡　；参考：《中国环境监测》2016年06期

【摘要】：为考察遂宁市辖区内集中式饮用水水源地污染物钡的分布特征和健康风险水平,通过电感耦合等离子体原子发射光谱法对研究区域内市级、县级和乡镇级所有在用的56个集中式饮用水水源地钡的浓度进行分析检测,借助空间分析与统计分析的结果,探讨了其空间分布和浓度差异,并利用环境健康风险评价模型,对不同类型水源地钡的健康风险进行了评价。结果表明,38个地表水水源地钡的浓度范围为0.065~0.180 mg/L,均值为0.110 mg/L;18个地下水水源地钡的浓度范围为0.027~0.370 mg/L,均值为0.130 mg/L。地表水与地下水水源地间钡的浓度差异具有统计学意义(P0.05),钡的空间分布也存在不同程度的差异性。各水源地中的钡经饮用和皮肤暴露两种途径对成人和儿童所引起的非致癌风险值为1.34×10~(-8)~1.62×10~(-8),远低于推荐的最大可接受风险水平(1.0×10~(-6)),各水源地因污染物钡导致的非致癌风险极低。
[Abstract]:In order to investigate the distribution characteristics and health risk level of barium in centralized drinking water sources in Suining City, the ICP-atomic emission spectrometry (ICP-AES) was used to study the municipal level in the study area. The concentration of barium in 56 centralized drinking water sources at county level and township level was analyzed and detected. The spatial distribution and concentration difference were discussed with the help of the results of spatial analysis and statistical analysis, and the environmental health risk assessment model was used. The health risk of barium in different water sources was evaluated. The results show that the concentration range of barium in 38 surface water sources is 0.065 ~ 0.180 mg / L, the mean value is 0.110 mg / L, and the concentration range of barium in 18 groundwater sources is 0.027 ~ 0.370 mg / L, with a mean value of 0.130 mg 路L ~ (-1). The difference of barium concentration between surface water and groundwater source was statistically significant (P0.05), and the spatial distribution of barium was also different in different degrees. The non-carcinogenic risk of barium from drinking and skin exposure to adults and children was 1.34 脳 10 ~ (-8) and 1.62 脳 10 ~ (-8), which was far lower than the recommended maximum acceptable risk level (1.0 脳 10 ~ (-6),).
【作者单位】：遂宁市环境监测中心站;遂宁市环境保护信息中心;
【分类号】：X824;X52

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