2019年长江江苏段饮用水中二甲基亚硝胺的现状调查  

Dimethylnitrosamine contamination in drinking water in Jiangsu reach of Yangtze River

作　　者：罗曼 李凌[2] 张付刚[2] 张可[2] 梁晓军[3] 顾鸿儒 朱红艳 高科[6] 王丽[1] 熊传龙[1] 李洪兴[1] 张荣[1] LUO Man;LI Ling;ZHANG Fu-gang;ZHANG Ke;LIANG Xiao-jun;GU Hong-ru;ZHU Hong-yan;GAO Ke;WANG Li;XIONG Chuan-long;LI Hong-xing;ZHANG Rong(National Center for Rural Water Supply Technical Guidance,Chinese Center for Disease Control and Prevention,Beijing 102200,China;不详)

机构地区：[1]中国疾病预防控制中心农村改水技术指导中心,北京102200 [2]苏州市疾病预防控制中心检验科 [3]昆山市疾病预防控制中心职业卫生环境卫生科 [4]太仓市疾病预防控制中心卫生科 [5]张家港疾病预防控制中心环境卫生科 [6]常熟市疾病预防控制中心职业卫生环境卫生科

出　　处：《环境与健康杂志》2019年第11期1025-1028,共4页Journal of Environment and Health

基　　金：中国疾病预防控制中心应急反应机制项目。

摘　　要：目的了解我国长江流域下游江苏段饮用水中二甲基亚硝胺(NDMA)水平以及处理工艺对其成因的影响。方法于2019年7—8月,在长江流域下游江苏段选择9个集中式供水单位(简称水厂),分别采集原水、不同处理工艺出水、出厂水及末梢水水样,检测NDMA的水平。结果共采集并监测水样53份,水样中二甲基亚硝胺总浓度范围为2.36~20.08ng/L,平均浓度为(7.56±3.83)ng/L。出厂水及末梢水样中NDMA浓度低于原水(P<0.05),水厂处理工艺流程中NDMA浓度总体呈下降趋势。使用液氯的水厂末梢水样中NDMA浓度高于使用次氯酸钠+氯胺消毒的水厂。结论长江流域下游江苏段饮用水中NDMA浓度总体处于较低水平。集中式供水单位的饮用水处理工艺对原水中NDMA具有明显去除作用,且相较于使用液氯作为消毒剂的传统氯化消毒而言,可在一定程度上认为氯胺消毒有助于减少NDMA的产生。Objective To know the contamination level of dimethylnitrosamine(NDMA)in drinking water in Jiangsu reach of the Yangtze River in China and the influence of water treatment processes.Methods A total of nine centralized water supply units were selected in Jiangsu reach of the Yangtze River Basin from July 2019 to August 2019,the sources water,water of different treatment processes,finished water and tap water samples were collected respectively and the levels of NDMA were determined.The basic information on centralized water supply units was collected by using questionnaires.Results The total concentration of NDMA in 53 water samples ranged from 2.36 to 20.08 ng/L with an average concentration of 7.56 ng/L and a standard deviation of 3.83 ng/L.The concentration of NDMA in finished water and tap water samples was lower than that in raw water(P<0.05)and was decreasing in water treatment process.The concentration of NDMA in the tap water of the water plant with disinfection by liquid chlorine was higher than that of the water plant with disinfection by sodium hypochlorite+chloramine(P<0.05).Conclusion The concentration of NDMA in drinking water in the Jiangsu reach of the Yangtze River Basin is generally at a lower level.The drinking water treatment process of centralized water supply unit has obvious removal effect on NDMA in raw water,and chloramine disinfection can be considered to be helpful to reduce the generation of NDMA to some extent compared with traditional chlorination disinfection using liquid chlorine as disinfectant.

关 键 词：二甲基亚硝胺 原水 处理工艺 出厂水 末梢水 

分 类 号：R123.1[医药卫生—环境卫生学]