Opportunistic pathogens and their health risk in four full-scale drinking water treatment and distribution systems
文献类型：期刊论文
| 作者 | Huang, Jingang; Chen, Susu; Ma, Xu; Yu, Pingfeng; Zuo, Pengxiao; Shi, Baoyou ; Wang, Haibo; Alvarez, Pedro J. J.
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| 刊名 | ECOLOGICAL ENGINEERING
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 160页码:- |
| ISSN号 | 0925-8574 |
| 关键词 | Potable water systems Turbidity Disinfection Opportunistic pathogens Health risk |
| 英文摘要 | This study investigated the occurrence of various opportunistic pathogens (OPs) through four drinking water treatment and distribution systems in eastern China. Conventional treatment trains involving coagulation/ sedimentation, filtration, and disinfection efficiently removed total coliforms from 1700 to 2300 CFU/L in the influent to undetectable levels in treated and tap water. However, culture-independent qPCR analysis detected Legionella spp., Mycobacterium spp., Mycobacteria avium, Pseudomonas aeruginosa and the amoeba Acanthamoeba spp. in all water samples, reaching maximum tap water concentrations of 5.33, 4.87, 1.63, 3.85, and 4.32 log (gene copies/mL), respectively. Thus, OPs were abundant in tap water despite total coliforms met applicable microbiological standards in China (GB 5749-2006). Occurrence of OPs correlated positively with turbidity and chemical oxygen demand (COD), and negatively with chlorine residual. Turbidity removal by coagulation and COD removal by ozonation (O-3) followed by biological activated carbon (BAC) filtration was the treatment train with the highest OPs removal efficiency, and ClO2 was a more effective disinfectant than NaClO. OPs significantly rebounded in the tap water (up to 11-fold for P. aeruginosa and 21-fold for M. avium in tap water). However, quantitative microbial risk analysis (QMRA) showed that the potential infection risks in tap water were still below WHO (10(-3)) and even EPA (10(-4)) benchmarks. Overall, likely underestimation of the pathogenic risk by culture-dependent quantification of indicator organisms makes it prudent to use molecular approaches to periodically revisit the safety of water distribution systems. |
| WOS研究方向 | Ecology ; Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46247]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Renmin Univ China, Sch Environm & Nat Resource, Beijing 100082, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 4.Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Peoples R China 5.Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA |
| 推荐引用方式 GB/T 7714 | Huang, Jingang,Chen, Susu,Ma, Xu,et al. Opportunistic pathogens and their health risk in four full-scale drinking water treatment and distribution systems[J]. ECOLOGICAL ENGINEERING,2021,160:-. |
| APA | Huang, Jingang.,Chen, Susu.,Ma, Xu.,Yu, Pingfeng.,Zuo, Pengxiao.,...&Alvarez, Pedro J. J..(2021).Opportunistic pathogens and their health risk in four full-scale drinking water treatment and distribution systems.ECOLOGICAL ENGINEERING,160,-. |
| MLA | Huang, Jingang,et al."Opportunistic pathogens and their health risk in four full-scale drinking water treatment and distribution systems".ECOLOGICAL ENGINEERING 160(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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