Comparative genotoxicity of water processed by three drinking water treatment plants with different water treatment procedures  

作　　者：Ting Zhang Heze Liu Yiyuan Zhang Wenjun Sun Xiuwei Ao 

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

出　　处：《Frontiers of Environmental Science & Engineering》2020年第3期27-37,共11页环境科学与工程前沿（英文）

基　　金：This study was supported by the National Natural Science Foundation of China(Grant Nos.51778323,51761125013 and 51290284);the National Science and Technology Major Project of China(Grant Nos.2012ZX07404-002,2017ZX07108-003 and 2017ZX07502003).

摘　　要：Advanced water treatment is commonly used to remove micropollutants such as pesticides,endocrine disrupting chemicals,and disinfection byproducts in modem drinking water treatment plants.However,little attention has been paid to the changes in the genotoxicity of substances remaining in the water following the different water treatment processes.In this study,samples were collected from three drinking water treatment plants with different treatment processes.The treated water from each process was analyzed and compared for genotoxicity and the formation of organic compounds.The genotoxicity was evaluated by an umu test,and the acute and chronic toxicity was analyzed through Ecological Structure-Activity Relationship(ECOSAR).The results of the umu test indicated that biological activated carbon reduced the genotoxicity by 38%,77%,and 46%in the three drinking water treatment plants,respectively,while chlorination increased the genotoxicity.Gas chromatograph-mass spectrometry analysis revealed that halogenated hydrocarbons and aromatic compounds were major contributors to genotoxicity.The results of ECOSAR were not consistent with those of the umu test.Therefore,we conclude that genotoxicity cannot be determined using ECOSAR.

关 键 词：Drinking water Treatment process GENOTOXICITY Umu test Ecological Structure-Activity Relationship 

分 类 号：TU991.2[建筑科学—市政工程]