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目的研究饮用水中氯化消毒副产物的形成及其分布规律。方法采用仪器法和化学分析法,对不同采样点水源水、出厂水和管网水进行氯化消毒副产物检测。结果水源水、出厂水和管网末梢水中三卤甲烷检出率60.20%、有13.40%超标;卤乙酸的检出率50.05%,超标率为2.10%。丰水期的水中消毒副产物浓度高于枯水期,市县级水厂与乡镇水厂污染程度无差别。结论某市氯化消毒的饮用水中三氯甲烷副产物检出率达50%以上,部分水中毒副产物含量超标,应改进水消毒工艺,加强水源保护。
Objective To study the formation and distribution of chlorinated disinfection by-products in drinking water. Methods Instruments and chemical analysis were used to detect chlorinated disinfection by-products in tap water, ex-factory water and pipe network water at different sampling points. Results The detection rates of trihalomethanes in tap water, ex-factory water and pipe network were 60.20%, with 13.40% exceeding the standard. The detection rate of haloacetic acid was 50.05% and the exceeding standard rate was 2.10%. During the wet season, the concentration of disinfection by-products in water was higher than that in the dry season, and there was no difference in the pollution degree between municipal and county water plants and township water plants. Conclusion The detection rate of by-product of chloroform in drinking water of chlorination in a certain city is more than 50%, the content of some by-products of water poisoning is excessive, water disinfection technology should be improved and water source protection should be strengthened.