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目的分析上海市黄浦区生活饮用水中氯化消毒副产物(CDBPs)的污染水平和分布特征,同时研究氯化消毒副产物产生的影响因素。方法选取辖区内出厂水、管网水、二次供水等供水情况进行调查,同时对主要的氯化消毒副产物以及天然有机物、总氯等指标进行检测。结果水体中含量总体分布为三氯甲烷>二氯一溴甲烷>一氯二溴甲烷>三溴甲烷;其水体中含量总体分布为二氯乙酸>三氯乙酸;一氯二溴甲烷、三溴甲烷、二氯乙酸的浓度丰水期和枯水期比较,其差异有统计学意义(P<0.05),丰水期含量高于枯水期;饮水中二溴一氯甲烷、三溴甲烷、三氯乙酸浓度与总有机碳含量呈正相关,Pearson相关系数分别为0.383、0.564、0.340(P<0.05)。结论在该区饮用水中氯化消毒副产物有较高的检出率,丰水期含量高于枯水期。总有机碳是氯化消毒副产物形成的影响因素。
Objective To analyze the pollution levels and distribution characteristics of chlorinated disinfection by-products (CDBPs) in drinking water of Huangpu District, Shanghai, and to study the influencing factors of chlorination disinfection by-products. Methods The water supply conditions such as factory water, pipe network water and secondary water supply in the area were selected for investigation. At the same time, the main chlorinated disinfection by-products, natural organic compounds and total chlorine were tested. Results The overall distribution of water content was chloroform> dichlorobromomethane> monochlorobromomethane> tribromomethane; its water content was generally distributed as dichloroacetic acid> trichloroacetic acid; chlorodibromomethane, tribromomethane, dichloroacetic acid (P <0.05), and the content in wet season was higher than that in dry season. The concentration of dibromochloromethane, tribromomethane and trichloroacetic acid in drinking water was positively correlated with the total organic carbon Correlation, Pearson correlation coefficients were 0.383,0.564,0.340 (P <0.05). Conclusion The detection rate of chlorinated disinfection by-products in drinking water in this area is higher than that in dry season. Total organic carbon is the formation of chlorinated disinfection byproduct of the influencing factors.