sul1 and tetG, and the integrase gene of class 1 integrons-em class="EmphasisTypeItalic">intI1 by chlorination, ultraviolet (UV), and ozonation disinfection. Inactivation of sul1, tetG, and intI1 underwent increased doses of three disinfectors, and chlorine disinfection achieved more inactivation of ARGs and intI1 genes (chlorine dose of 160?mg/L with contact time of 120?min for 2.98-.24 log reductions of ARGs) than UV irradiation (UV dose of 12,477?mJ/cm2 for 2.48-.74 log reductions of ARGs) and ozonation disinfection (ozonation dose of 177.6?mg/L for 1.68-.55 log reductions of ARGs). The 16S rDNA was more efficiently removed than ARGs by ozone disinfection. The relative abundance of selected genes (normalized to 16S rDNA) increased during ozonation and with low doses of UV and chlorine disinfection. Inactivation of sul1 and tetG showed strong positive correlations with the inactivation of intI1 genes (for sul1, R 2 --.929 with p-lt;-.01; for tetG, R 2 --.885 with p-lt;-.01). Compared to other technologies (ultraviolet disinfection, ozonation disinfection, Fenton oxidation, and coagulation), chlorination is an alternative method to remove ARGs from wastewater effluents. At a chlorine dose of 40?mg/L with 60?min contact time, the selected genes inactivation efficiency could reach 1.65-.28 log, and the cost was estimated at 0.041?yuan/m3." />
Inactivation of antibiotic resistance genes in municipal wastewater by chlorination, ultraviolet, and ozonation disinfection
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  • 作者：Yao Zhuang ; Hongqiang Ren ; Jinju Geng…
  • 关键词：Antibiotic resistance genes ; Inactivation ; Municipal wastewater ; Disinfection
  • 刊名：Environmental Science and Pollution Research
  • 出版年：2015
  • 出版时间：May 2015
  • 年：2015
  • 卷：22
  • 期：9
  • 页码：7037-7044
  • 全文大小：534 KB
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  • 作者单位：Yao Zhuang (1)
    Hongqiang Ren (1)
    Jinju Geng (1) (2)
    Yingying Zhang (1)
    Yan Zhang (1)
    Lili Ding (1)
    Ke Xu (1)

    1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, People’s Republic of China
    2. Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
  • 刊物类别：Earth and Environmental Science
  • 刊物主题：Environment
    Environment
    Atmospheric Protection, Air Quality Control and Air Pollution
    Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
    Industrial Pollution Prevention
  • 出版者：Springer Berlin / Heidelberg
  • ISSN：1614-7499
文摘
This study investigated the inactivation of two antibiotic resistance genes (ARGs)-em class="EmphasisTypeItalic">sul1 and tetG, and the integrase gene of class 1 integrons-em class="EmphasisTypeItalic">intI1 by chlorination, ultraviolet (UV), and ozonation disinfection. Inactivation of sul1, tetG, and intI1 underwent increased doses of three disinfectors, and chlorine disinfection achieved more inactivation of ARGs and intI1 genes (chlorine dose of 160?mg/L with contact time of 120?min for 2.98-.24 log reductions of ARGs) than UV irradiation (UV dose of 12,477?mJ/cm2 for 2.48-.74 log reductions of ARGs) and ozonation disinfection (ozonation dose of 177.6?mg/L for 1.68-.55 log reductions of ARGs). The 16S rDNA was more efficiently removed than ARGs by ozone disinfection. The relative abundance of selected genes (normalized to 16S rDNA) increased during ozonation and with low doses of UV and chlorine disinfection. Inactivation of sul1 and tetG showed strong positive correlations with the inactivation of intI1 genes (for sul1, R 2 --.929 with p-lt;-.01; for tetG, R 2 --.885 with p-lt;-.01). Compared to other technologies (ultraviolet disinfection, ozonation disinfection, Fenton oxidation, and coagulation), chlorination is an alternative method to remove ARGs from wastewater effluents. At a chlorine dose of 40?mg/L with 60?min contact time, the selected genes inactivation efficiency could reach 1.65-.28 log, and the cost was estimated at 0.041?yuan/m3.

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