【摘要】 目的 了解消毒剂联合使用对生活饮用水中三卤甲烷（THMs）、氯酸盐、亚氯酸盐生成和比例的影响。方法 于2021年7月至2021年9月，采集深圳市某区3家集中供水单位的出厂水及其对应的末梢水，检测水中三氯甲烷、二氯一溴甲烷、一氯二溴甲烷和三溴甲烷含量，并分析二氧化氯和次氯酸钠消毒剂联合使用对生活饮用水中三卤甲烷（THMs）、氯酸盐、亚氯酸盐生成和比例的影响。结果 共检测76份生活饮用水水样，均检出三氯甲烷、二氯一溴甲烷、一氯二溴甲烷和三溴甲烷4种THMs，检测结果均符合GB 5749—2022中的要求。使用二氧化氯+次氯酸钠联用消毒可以降低氯化消毒副产物的生成量，且4种THMs的构成比例发生改变。结论 二氧化氯+次氯酸钠联用消毒能减少NaClO的投放次数，降低THMs的生成量，使用单一次氯酸钠消毒可能存在THMs超标的风险；使用次氯酸钠消毒的水厂应进行氯酸盐的检测；使用二氧化氯+次氯酸钠联用的水厂应加强氯酸盐、亚氯酸盐浓度的检测。更多还原

【Abstract】 Objective To understand the effect of of disinfectants in combination on generation trihalomethanes（THMs）,chlorates（ClO₃^-）and chlorites（ClO₂^-） in drinking water.Methods From July 2021 to September 2021,the water samples were collected from three waterworks in a district of Shenzhen,including finished water and corresponding terminal water.The contents of trichloromethane,dichlorobromomethane,dichlorodibromomethane and tribromomethane in the water were determined,and the effect of the combined use of chlorine dioxide and sodium hypochlorite disinfectants on the generation and proportion of THMs,ClO₃^-and ClO₂^-in drinking water were analyzed.Results A total of 76 drinking water samples were tested,and four types of THMs,namely trichloromethane,dichlorobromomethane,monochlorodibromomethane and tribromomethane were detected.The test results met the requirements of GB 5749-2022.The combination of chlorine dioxide and sodium hypochlorite for disinfection could reduce the generation of chlorination disinfection by-products,and the composition ratio of the four THMs changes.Conclusion The combination of chlorine dioxide and sodium hypochlorite disinfection can reduce the frequency of NaClO release and decrease the generation of THMs.The use of single sodium hypochlorite disinfection may pose a risk of THMs exceeding the standard.Waterworks that using sodium hypochlorite for disinfection should undergo testing for chlorates.Waterworks that using chlorine dioxide and sodium hypochlorite in combination should strengthen the detection of chlorate and chlorite concentrations.更多还原