沱江干流河水中高氯酸盐浓度水平及潜在人体暴露评估

Assessment of Perchlorate Concentration in Tuojiang River Basin and its Associated Human Exposure

在沱江干流区域采集了29个地表水样品,分析了高氯酸盐浓度水平,评估了居民通过饮用水造成的高氯酸盐暴露情况。研究表明,高氯酸盐广泛存在于沱江干流河水中,浓度为3.39~19.60μg/L。高氯酸盐含量在沱江干流区域有一定空间分布特征,人口和工业相对集中的成都和资阳段地表水中高氯酸盐浓度更高。人体暴露评估结果表明,在平均暴露模式下,沱江干流区域居民通过饮用水暴露于高氯酸盐的量未超过美国环保署规定,基本安全。

A total of 29 surface water samples were collected from Tuojiang River basin in Sichuan province to investigate perchlorate concentration levels and assess the residents'perchlorate exposure caused by drinking water.The results showed that perchlorate is widely distributed in the Tuojiang Main stream with a concentration of 3.39~19.60μg/L.There was obvious spatial distribution of perchlorate along the Tuojiang River,the perchlorate concentration was higher in the surface water in in the Chengdu and Ziyang reaches where the population and industry are relatively concentrated as compared to the other sampling sites.The human exposure assessment results showed that,under the average exposure mode,the amount of perchlorate exposed by residents in the Tuojiang River main stream through drinking water did not exceed the US Environmental Protection Agency regulations,which is basically safe.