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    谢晴

    • 高级工程师    
    • 主要任职:无
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 在职信息:在职
    • 所在单位:环境学院
    • 学科:环境工程
    • 办公地点:环境楼A315
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    Effects of dissolved organic matter derived from freshwater and seawater on photodegradation of three antiviral drugs

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    论文类型:期刊论文

    第一作者:Zhou Chengzhi

    通讯作者:Niu, Junfeng(niujf@dgut.edu.cn)

    合写作者:Xie Qing,Wang Jieqiong,Chen Xi,Niu Junfeng,Chen Jingwen

    发表时间:2020-03-01

    发表刊物:Environmental pollution (Barking, Essex : 1987)

    收录刊物:EI、PubMed

    卷号:258

    页面范围:113700

    ISSN号:1873-6424

    关键字:Antiviral drug,Aquatic environment,Dissolved organic matter,Photodegradation

    摘要:Dissolved organic matter (DOM) is the most important light absorber that may induce indirect photolytic transformation of organic pollutants in natural waters. In this study, effects of DOM derived from freshwater and seawater on the photodegradation of three antiviral drugs acyclovir, lamivudine and zidovudine were investigated. Results show that the photodegradation of acyclovir is promoted mainly by excited triplet states DOM (3DOM*), and the photodegradation of lamivudine is accelerated by 3DOM*, •OH and 1O2 together; however, the photodegradation of zidovudine is inhibited by DOM mainly via light screening. Compared with DOM from freshwater, promotion effect of DOM extracted from seawater (SDOM) on the photodegradation of acyclovir and lamivudine is weaker, which is attributed to lower productivity of reactive intermediates. On the other hand, inhibitory effect of SDOM on the photodegradation of zidovudine is also weaker, which is due to weaker light screening caused by lower light absorption. Photodegradation half-lives of the three antiviral drugs are predicted to be all more than 20 days in freshwater and seawater bodies of the Yellow River estuarine region. These findings are significant for understanding the phototransformation processes of antiviral drugs and other organic pollutants in estuarine and coastal regions.Copyright © 2019 Elsevier Ltd. All rights reserved.