自贡市乡镇自来水厂氯化消毒副产物调查

Investigation of Chlorinated Disinfection Byproducts in Township Waterworks in Zigong

目的调查自贡市乡镇自来水厂消毒副产物的现状。方法 2010年分别在丰水期和枯水期对32家乡镇自来水厂进行卫生学调查并对源水、出厂水及末梢水中三卤甲烷、卤乙酸等指标进行测定。结果 32家自来水厂均检出氯化消毒副产物,包括4种三卤甲烷(三氯甲烷、二氯一溴甲烷、一氯二溴甲烷和三溴甲烷)和2种卤乙酸(二氯乙酸、三氯乙酸),三氯甲烷超标率为28%,二氯乙酸超标率为22%,二氯一溴甲烷超标率为3%。结论自贡市乡镇水厂均存在不同程度的消毒副产物污染,其对居民身体健康的影响不容忽视。

Objective To investigate the current situation of disinfection byproducts in township waterworks in Zig0ng. Methods The hygienic investigation was carded out in 32 township waterworks during wet season and the dry season, with trihalomethanes and haloacetic acids in source water, product water and tap water detected. Results The disinfection byproducts were detected in different degrees in all of the 32 waterworks, byproducts including 4 kinds of trihalomethanes （ chloroform, monobromo - dichloro - methane, dibromo - monochloro - methane and methenyl bromide） and 2 kinds of haloacetic acids （ dichloroacetic acid and trichloroacetic acid）. The over standard rate of chloroform, dichloroacetic acid and monobromo - dichloro methane was 28%, 22% and 3%, respectively. Conclusion Pollution of disinfection byproducts exists in all the township waterworks in Zigong in different degrees, that harms people health.