伊犁河流域城镇饮用水中重金属健康风险评价

Health Risk Assessment of Heavy Metals for Urban Drinking Water in Yili River Basin

为深入了解伊犁河流域城镇饮用水中重金属的健康危害风险状况,对9个县市的饮用水进行了调查研究,并采用美国国家环保局推荐的健康风险评价模型对饮用水中重金属健康风险进行了评价。结果表明:伊犁河流域部分县市的饮用水中有重金属(As、Pb、Zn等)被检出,但浓度均满足《地下水质量标准》(GB/T 14848-2017)中Ⅲ类水质的限值;个人化学致癌物总年风险明显高于非致癌物总年风险;各饮用水源地的个人健康危害年总风险数量级在7.9×10^(-5)~9.0×10^(-5)a^(-1),远低于USEPA推荐的个人健康风险值1.0×10^(-4)a^(-1),所致个人健康危害风险较低。

The drinking water was analized from 9 cities to intensively investigate healthy risk of heavy metals for urban drinking water in Yili river basin.The health risk assessment of heavy metals for the water were evaluated by using American health risk assessment model（USEAP）which was highly recommended by American Environmental protection Bureau.The results indicated that the values of heavy metals（As,Pb,Zn ect.）were blow the limit of national standard class III for groundwater（GB/T 14848-2017）,and the health risk of carcinogens to individuals were much higher than that of non-carcinogens.The result show that the level of individual annual health risks in drinking water ranged from 8.3×10^（-5）to 9.7×10^（-5）a^（-1）,which was much lower than the risk levels recommended by USEPA（1.0×10^（-4）a^（-1））,and the individual health risk was lower.