Reduction of antibiotic resistance genes in municipal wastewater effluent by advanced oxidation processes

The Science of the Total Environment
Yingying ZhangLili Ding

Abstract

This study investigated the reduction of antibiotic resistance genes (ARGs), intI1 and 16S rRNA genes, by advanced oxidation processes (AOPs), namely Fenton oxidation (Fe(2+)/H2O2) and UV/H2O2 process. The ARGs include sul1, tetX, and tetG from municipal wastewater effluent. The results indicated that the Fenton oxidation and UV/H2O2 process could reduce selected ARGs effectively. Oxidation by the Fenton process was slightly better than that of the UV/H2O2 method. Particularly, for the Fenton oxidation, under the optimal condition wherein Fe(2+)/H2O2 had a molar ratio of 0.1 and a H2O2 concentration of 0.01molL(-1) with a pH of 3.0 and reaction time of 2h, 2.58-3.79 logs of target genes were removed. Under the initial effluent pH condition (pH=7.0), the removal was 2.26-3.35 logs. For the UV/H2O2 process, when the pH was 3.5 with a H2O2 concentration of 0.01molL(-1) accompanied by 30min of UV irradiation, all ARGs could achieve a reduction of 2.8-3.5 logs, and 1.55-2.32 logs at a pH of 7.0. The Fenton oxidation and UV/H2O2 process followed the first-order reaction kinetic model. The removal of target genes was affected by many parameters, including initial Fe(2+)/H2O2 molar ratios, H2O2 concentration, solution pH, and reaction ...Continue Reading

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Citations

Apr 20, 2016·The Science of the Total Environment·Giovanna FerroLuigi Rizzo
Nov 5, 2016·ChemSusChem·Rosaria CiriminnaMario Pagliaro
Oct 8, 2019·Journal of Environmental Quality·Irene BuenoRandall S Singer
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Jul 24, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Lei ChenYilu Xu
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Mar 30, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Wei SongXiaolei Zhang
Dec 3, 2020·International Journal of Environmental Research and Public Health·Gabriela BairánEduardo Torres
Nov 20, 2020·The Science of the Total Environment·Danhui LiangHongbo Liu
Jan 28, 2021·Trends in Microbiology·Ana Carolina Maganha de Almeida KumlienJosé Luis Balcázar
Oct 23, 2019·The Science of the Total Environment·Shengnan LiFengxiang Li
Feb 23, 2021·Journal of Environmental Management·Pâmela B VilelaCamila C de Amorim
Nov 29, 2017·Environmental Science & Technology·Yan ZhangDonghui Wen
Aug 21, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Olesia ShmychkovaAlexander Velichenko
Sep 4, 2019·The Science of the Total Environment·Magdalena PazdaEwa Mulkiewicz

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