Exposure levels and health risk evaluation of trihalomethanes in drinking water and swimming pool water in summer in Yinchuan City
Objective This paper aims to know the exposure levels of trihalomethanes and health risks in drinking water and swimming pool water in summer in Yinchuan City.Methods Drinking water and indoor swimming pool water in Xingqing District,Jinfeng District and Xixia District of Yinchuan City were selected from July to August in 2022.The concentrations of trihalomethanes were determined according to Standard Test Methods for Drinking Water(GB/T 5750-2006),and the levels of trihalomethanes exposed orally and through skin and swimming pool water were detected to evaluate the carcinogenic and non-carcinogenic risks.Results Trihalomethanes were determined in drinking water and swimming pool water in summer in Yin-chuan City,and the concentration of trihalomethanes in swimming pool water was higher than that in drinking water.The expo-sure levels of trihalomethanes presented a tendency of trichloromethane＞dichlorobromomethane＞dichlorobromomethane＞tri-bromomethane.The oral exposure level of trihalomethanes was about 15-30 times of the level exposed through skin.The carci-nogenic risk of trihalomethanes in 6-8 years old group was the highest,and its value was 3.86 × 10-5.The carcinogenic risk of trihalomethanes in 15-17 years old group was the lowest,and its value was 2.23 × 10-5.Conclusion The detection rate of trihalomethanes in swimming pool water is higher than that in drinking water in summer in Yinchuan,and the oral exposure level of trihalomethanes is higher than dermal exposure level.The carcinogenic risk of trihalomethanes of populations is in the accept-able range in drinking water and swimming pool water,and the non-carcinogenic risk is much lower than 1.The carcinogenic risk of trihalomethanes of young children is significantly higher than that of adults.
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NSTL
万方数据
维普
