Destruction of microbial stability in drinking water distribution systems by trace phosphorus polluted water source
文献类型：期刊论文
| 作者 | Xing, Xueci; Li, Tong; Bi, Zhihao; Qi, Peng; Li, Zesong; Chen, Youyi; Zhou, Huishan; Wang, Haibo ; Xu, Gang; Chen, Chaoxiang
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021-07 |
| 卷号 | 275页码:- |
| 关键词 | Trace phosphate Microbial stability Drinking water distribution systems (DWDSs) Opportunistic pathogens (OPs) |
| ISSN号 | 0045-6535 |
| 英文摘要 | The effects of trace phosphate concentrations (0, 0.3 and 0.6 mg/L) in water source were investigated on microbial stability of the drinking water distribution systems (DWDSs). Obviously, the results verified that in the effluent of DWDSs simulated by annular reactors (ARs), the total microbial biomass and the absolute concentration of opportunistic pathogens such as Legionella pneumophila, Mycobacterium avium, and Hartmanella vermiformis increased significantly with phosphate concentration increasing. Based on X-ray powder diffractometer and zeta potentials measurement, trace phosphate did change physicochemical properties of corrosion products, hence promoting microbes escape from corrosion products to bulk water to a certain extent. Stimulated by chlorine disinfectant and phosphate, the extracellular polymeric substances (EPS) from the suspended biofilms of AR-0.6 gradually exhibited superior characteristics including higher content, flocculating efficiency, hydrophobicity and tightness degree, contributing to formation of large-scale suspended biofilms with strong chlorine-resistance ability. However, the disinfection by-products concentration in DWDSs barely changed due to the balance of EPS precursors contribution and biodegradation effect, covering up the microbiological water quality risk. Therefore, more attention should be paid to the trace phosphorus polluted water source though its concentration was much lower than wastewater. This is the first study successfully revealing the influence mechanism of trace phosphate on microbial stability in DWDSs, which may help to fully understand the biofilms transformation and microbial community succession in DWDSs. (C) 2021 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46191]  |
| 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.Nanzhou Waterworks Guangzhou Water Supply Co Ltd, Guangzhou 510000, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Guangzhou Univ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xing, Xueci,Li, Tong,Bi, Zhihao,et al. Destruction of microbial stability in drinking water distribution systems by trace phosphorus polluted water source[J]. CHEMOSPHERE,2021,275:-. |
| APA | Xing, Xueci.,Li, Tong.,Bi, Zhihao.,Qi, Peng.,Li, Zesong.,...&Hu, Chun.(2021).Destruction of microbial stability in drinking water distribution systems by trace phosphorus polluted water source.CHEMOSPHERE,275,-. |
| MLA | Xing, Xueci,et al."Destruction of microbial stability in drinking water distribution systems by trace phosphorus polluted water source".CHEMOSPHERE 275(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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