Genotoxicity of drinking water treated with different disinfectants and effects of disinfection conditions detected by umu-test  

作　　者：Xuebiao Nie Wenjun Liu Liping Zhang Qing Liu 

机构地区：[1]Division of Drinking Water Safety,School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Environmental Sciences》2017年第6期36-44,共9页环境科学学报（英文版）

基　　金：supported by the National Nature Science Foundation of China(No.50778096)

摘　　要：The genotoxieity of drinking water treated with 6 disinfection methods and the effects of disinfection conditions were investigated using the urea-test The pretreatment procedure of samples for the urea-test was optimized for drinking water analysis. The results of the urea-test were in good correlation with those of the Ames-test The genotoxicity and production of haloacetic acids （HAAs） were the highest for chlorinated samples. UV ＋ chloramination is the safest disinfection method from the aspects of genotoxicity, HAA production and inactivation effects. For chloramination, the effects of the mass ratio of C12 to N of chloramine on genotoxicity were also studied. The changes of genotoxicity were different from those of HAA production, which implied that HAA production cannot represent the genotoxic potential of water. The genotoxicity per chlorine decay of chlorination and chloramination had similar trends, indicating that the reaction of organic matters and chlorine made a great contribution to the genotoxicity. The results of this study are of engineering significance for optimizing the operation of waterworks.The genotoxieity of drinking water treated with 6 disinfection methods and the effects of disinfection conditions were investigated using the urea-test The pretreatment procedure of samples for the urea-test was optimized for drinking water analysis. The results of the urea-test were in good correlation with those of the Ames-test The genotoxicity and production of haloacetic acids （HAAs） were the highest for chlorinated samples. UV ＋ chloramination is the safest disinfection method from the aspects of genotoxicity, HAA production and inactivation effects. For chloramination, the effects of the mass ratio of C12 to N of chloramine on genotoxicity were also studied. The changes of genotoxicity were different from those of HAA production, which implied that HAA production cannot represent the genotoxic potential of water. The genotoxicity per chlorine decay of chlorination and chloramination had similar trends, indicating that the reaction of organic matters and chlorine made a great contribution to the genotoxicity. The results of this study are of engineering significance for optimizing the operation of waterworks.

关 键 词：CenotoxicityDrinking waterChlorineUVDisinfectionumu-test 

分 类 号：TU991.25[建筑科学—市政工程] X832[环境科学与工程—环境工程]