摘要
目的 了解深圳市龙岗区生活饮用水中三卤甲烷(THMs)的浓度,并评价饮用水THMs对人体健康产生的潜在风险。方法 对深圳市龙岗区2019—2023年市政供水中THMs浓度进行监测,通过健康风险评价模型对深圳市龙岗区THMs经饮水暴露及经沐浴皮肤暴露2种途径进行健康风险评价。结果 三氯甲烷(TCM)检出率均为100.00%,二氯一溴甲烷(DCBM)检出率均大于97.00%,一氯二溴甲烷(DBCM)检出率为76.34%~95.83%,检出率最低为三溴甲烷(TBM)。经饮水途径THMs致癌风险大于经皮肤暴露,THMs经皮肤暴露致癌风险均低于1.0×10^(-6)。末梢水经饮水途径暴露THMs的致癌风险大于1.0×10^(-6),但小于1.0×10-4。各类THMs不同暴露途径、不同水样类型、不同采水时期的非致癌风险均<1。结论 TCM、DCBM和DBCM经饮水暴露途径致癌风险值高于USEPA推荐值,存在一定健康风险,但处于可接受范围。THMs经饮水暴露致癌风险高于经沐浴皮肤暴露风险。
Objective To examine the concentration of trihalomethanes(THMs)in drinking water in Longgang District,Shenzhen,and to evaluate the potential risk of THMs to human health.Methods The concentration of THMs in the municipal water supply of Longgang District,Shenzhen was monitored from 2019 to 2023.An evaluation of the health risk associated with THMs exposure through drinking water and bathing in Longgang District,Shenzhen was conducted using a health risk assessment model.Results The detection rates of trichloromethane(TCM)were all 100.00%.The detection rates of bromo-dichloromethane(DCBM)were over 97.00%,and the detection rates of dibromochloromethane(DBCM)ranged from 76.34%to 95.83%.The lowest detection rate was found for tribromomethane(TBM).The carcinogenic risk of THMs through drinking water exceeded that through skin exposure,while the carcinogenic risk of THMs through skin exposure was below 1.0×10^(-6).Additionally,the carcinogenic risk of THMs exposed to peripheral water through drinking water was greater than 1.0×10^(-6) but less than 1.0×10-4.Furthermore,the non-carcinogenic risks of THMs in different exposure paths,various water sample types,and diverse water collection periods were found to be<1.Conclu⁃sions The carcinogenic risk values of TCM,DCBM,and DBCM in drinking water exceed the recommended levels set by USEPA,indicating a certain level of health risk within an acceptable range.The carcinogenic risk of exposure through drinking water is higher than that through bathing skin.
作者
王荀
周玉潇
韦慧慰
甘立勤
蔡钲沅
季佳佳
WANG Xun;ZHOU Yuxiao;WEI Huiwei;GAN Liqin;CAI Zhengyuan;JI Jiajia(Center for Disease Control and Prevention of Longgang District,Shenzhen 518172,China;Shenzhen Center for Disease Control and Prevention)
出处
《华南预防医学》
2024年第7期594-598,共5页
South China Journal of Preventive Medicine
基金
深圳市医学重点学科建设经费(SZXK067)
深圳市龙岗区医疗卫生科技计划项目(LGWJ2021-127)。
关键词
饮用水
三卤甲烷
消毒副产物
健康风险
Drinking water
Trihalomethanes
Disinfection by-products
Health risk
