Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems

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	Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems
	Liu, Lizhong ; Xing, Xueci ; Hu, Chun ; Wang, Haibo ; Lyu, Lai
刊名	CHEMOSPHERE
	2019-03
卷号	219 页码:971-980
关键词	UWCl2 disinfection Opportunistic pathogens (OPs) DWDS qPCR
ISSN号	0045-6535
英文摘要	Drinking water distribution systems (DWDS) may be a Trojan Horse for some waterborne diseases caused by opportunistic pathogens (OPs). In this study, two simulated DWDS inoculated with ground-water were treated with chlorine (Cl-2) and ultraviolet/chlorine (UV/Cl-2) respectively to compare their effects on the OPs distributed in four different phases (bulk water, biofilms, corrosion products, and loose deposits) of DWDS. 16S rRNA genes sequencing and qPCR were used to profile microbial community and quantify target genes of OPs, respectively. Results showed that UV/Cl-2 was more effective than single Cl-2 to control the regrowth of OPs in the water with the same residual chlorine concentration. However, the OPs inhabiting the biofilms, corrosion products, and loose deposits seemed to be tolerant to UV/Cl-2 and Cl-2, demonstrating that OPs residing in these phases were resistant to the disinfection processes. Some significant microbial correlations between OPs and Acanthamoeba were found by Spearman correlative analysis (p < 0.05), demonstrating that the ecological interactions may exist in the DWDS. 16S rRNA genes sequencing of water samples revealed a significant different microbial community structure between UV/Cl-2 and Cl-2. This study may give some implications for controlling the OPs in the DWDS disinfected with UV/Cl-2. (C) 2018 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43078]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Aquat Sci & Technol, Beijing 100085, Peoples R China 2.East China Univ Technol, Sch Water Resource & Environm Engn, Nanchang 330013, Jiangxi, Peoples R China 3.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China 4.Guangzhou Univ, Minist Educ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lizhong,Xing, Xueci,Hu, Chun,et al. Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems[J]. CHEMOSPHERE,2019,219:971-980.
APA	Liu, Lizhong,Xing, Xueci,Hu, Chun,Wang, Haibo,&Lyu, Lai.(2019).Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems.CHEMOSPHERE,219,971-980.
MLA	Liu, Lizhong,et al."Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems".CHEMOSPHERE 219(2019):971-980.