Spatio-temporal characteristics of genotoxicity in the Yangtze River under the background of COVID-19 pandemic  

作　　者：Xinge Wang Na Li Yingnan Han Xiao Li Weixiao Qi Jian Li Kaifeng Rao Zijian Wang Yanjie Wei Mei Ma 

机构地区：[1]Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [3]Yangtze Eco-Environment Engineering Research Center,China Three Gorges Corporation,Beijing 100038,China [4]National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery,Beijing 100085,China [5]University of Chinese Academy of Sciences,Beijing 100049,China [6]Center for Water and Ecology,State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China [7]Engineering Research Center of Groundwater Pollution Control and Remediation,Ministry of Education,College of Water Sciences,Beijing Normal University,Beijing 100875,China [8]Key Laboratory of Environmental Protection in Water Transport Engineering Ministry of Communications,Tianjin Research Institute of Water Transport Engineering,Tianjin 300456,China

出　　处：《Frontiers of Environmental Science & Engineering》2024年第11期121-132,共12页环境科学与工程前沿（英文）

基　　金：supported by the National Key Research and Development Program(No.2021YFC3200803);the Scientific Research Project of China Three Gorges Corporation(No.201903139);the National Key R&D Program of China(No.2021YFC3200102);the National Natural Science Foundation of China(No.42007227);the National Natural Science Foundation of China(No.52030003);the Natural Science Foundation of Tianjin(No.22YFYSHZ00060).

摘　　要：The global spread of viruses can lead to the release of large amounts of disinfectants or antiviral drugs into the water environment.The resulting disinfection byproducts(DBPs)and residual antiviral drugs,acting as genotoxic substances or their precursors,may pose risks to aquatic animals and drinking water sources;however,to date,no studies have analyzed the changes in genotoxicity in the Yangtze River before and after the epidemic.In the present study,water and sediment samples from the Yangtze River were collected during different seasons,just before and after the outbreak of COVID-19,and were assessed using the SOS/umu test(with and without liver S9).The results indicated that water samples exhibited more pronounced genotoxicity than did sediments,with direct genotoxicity being the primary factor.Additionally,there were significant regional differences,with notably greater genotoxicity observed in the upper Yangtze River than in the lower reaches before the COVID-19 epidemic.However,this trend was reversed six to ten months later,suggesting the accumulation of DBPs or antiviral drugs after the COVID-19 pandemic.Moreover,the risk quotient indicated that 65%of the water samples posed a high risk for Paramecium caudatum,whereas 71%of the samples posed a medium risk for Danio rerio,thereby representing a potential threat to the ecological security of the Yangtze River.In conclusion,this study,at the basin scale,revealed the impacts of COVID-19 on the Yangtze River,highlighting the need to prevent DBPs and pharmaceutical pollution during similar events in the future.

关 键 词：Yangtze River COVID-19 GENOTOXICITY Spatio-temporal characteristics 

分 类 号：X52[环境科学与工程—环境工程]