生物膜
腐蚀
氯
化学
胞外聚合物
流出物
铸铁
环境化学
铁细菌
微生物
水处理
絮凝作用
化学工程
冶金
环境工程
细菌
材料科学
有机化学
环境科学
工程类
生物
遗传学
作者
Qi Pan,Tong Li,Chun Hu,Zesong Li,Zhihao Bi,Youyi Chen,Huishan Zhou,Ziliang Su,Xinjun Li,Xueci Xing
出处
期刊:Chemosphere
[Elsevier]
日期:2022-04-01
卷期号:292: 133364-133364
被引量:9
标识
DOI:10.1016/j.chemosphere.2021.133364
摘要
The effects of cast iron pipe corrosion on nitrogenous disinfection by-products formation (N-DBPs) in drinking water distribution systems (DWDSs) were investigated. The results verified that in the effluent of corroded DWDSs simulated by annular reactors with corroded cast iron coupons, typical N-DBPs, including haloacetamides, halonitromethanes, and haloacetonitriles, increased significantly compared with the influent of DWDSs. In addition, more dissolved organic carbon, adenosine triphosphate, and iron particles were simultaneously detected in the bulk water of corroded DWDSs, thereby indicating that abundant iron particles acted as a "protective umbrella" for microorganisms. Under the condition of corroded DWDSs, the extracellular polymeric substances gradually exhibited distinct characteristics, including a higher content and lower flocculation efficiency, thereby resulting in a large supply of N-DBPs precursors. Corroded cast iron pipes, equivalent to a unique microbial interface, induced completely distinct microbial community structures and metabolic functions in DWDSs, thereby enhancing the formation of N-DBPs. This is the first study to successfully reveal the interactions among iron particles, biofilms, and chlorine in DWDSs, which may help to fully understand the biofilm transformation and microbial community succession in DWDSs.
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