Persistence of antibiotic resistance genes and bacterial community changes in drinking water treatment system: From drinking water source to tap water
文献类型: 外文期刊
第一作者: Su, Hao-Chang
作者: Su, Hao-Chang;Su, Hao-Chang;Liu, You-Sheng;Pan, Chang-Gui;Chen, Jun;He, Liang-Ying;Ying, Guang-Guo;Ying, Guang-Guo
作者机构:
关键词: Antibiotic resistance genes;Bacteria;Drinking water;Treatment;Tap water
期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 影响因子:7.963; 五年影响因子:7.842 )
ISSN: 0048-9697
年卷期: 2018 年 616 卷
页码:
收录情况: SCI
摘要: As emerging contaminants, antibiotic resistance genes (ARGs) have become a public concern. This study aimed to investigate the occurrence and diversity of ARGs, and variation in the composition of bacterial communities in source water, drinking water treatment plants, and tap water in the Pearl River Delta region, South China. Various ARGs were present in the different types of water. Among the 27 target ARGs, floR and sul1 dominated in source water from three large rivers in the region. Pearson correlation analysis suggested that sul1, sul2, floR, and cmlA could be potential indicators for ARGs in water samples. The total abundance of the detected ARGs in tap water was much lower than that in source water. Sand filtration and sedimentation in drinking water treatment plants could effectively remove ARGs; in contrast, granular activated carbon filtration increased the abundance of ARGs. It was found that Pseudomonas may be involved in the proliferation and dissemination of ARGs in the studied drinking water treatment system. Bacteria and ARGs were still present in tap water after treatment, though they were significantly reduced. More research is needed to optimize the water treatment process for ARG removal. (c) 2017 Elsevier B.V. All rights reserved.
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