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Initial Formation and Accumulation of Manganese Deposits inDrinking Water Pipes: Investigating the Role of Microbial-Mediated Processes
Li, Guiwei; Su, Yuliang; Wu, Bin; Han, Guohang; Yu, Jianwei; Yang, Min; Shi, Baoyou
2022-05-03
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume56Issue:9Pages:5497-5507
AbstractMicrobial Mn(II) oxidation occurs in areas withinsufficient disinfectants in drinking water distribution systems.However, the overall processes of microbial-mediated Mn depositformation are unclear. This research investigated the initial Mn(II)oxidation, deposit accumulation, and biofilm development in pipeloops fed with nondisinfectedfinished water for 300 days. Theresults show that it took 20 days for microbial Mn(II) oxidationand deposition to be initiated visibly in new pipes continuouslyreceiving 100 mu g/L Mn(II). Once started, the deposit accumu-lation accelerated. A pseudo-first-order kinetic model couldsimulate the disappearance of Mn(II) in well-mixed pipe loopwater. The observed rate constant reached 2.81 h-1[correspond-ing to a Mn(II) half-life of 0.25 h] after 136 days of operation.Without oxygen, Mn(II) in the water also decreased rapidly to 1.0 mu g/L through adsorption to deposits, indicating that after theinitial microbial formation of MnOx, subsequent MnOxaccumulation was attributable to a combination of microbial andphysicochemical processes. Compared to the no-Mn condition, Mn(II) input resulted in 1 order of magnitude increase in biofilmformation. This study sheds light on the increasingly rapid processes of Mn accumulation on the inner surfaces of water pipesresulting from the biological activity of Mn(II)-oxidizing biofilms and the build-up of MnOxwith strong adsorption capacity.
Department中国科学院饮用水科学与技术重点实验室 ; 中国科学院饮用水科学与技术重点实验室
KeywordOXIDASE COMPLEX MNX MN(II) OXIDATION MULTICOPPER OXIDASE FREE CHLORINE PEDOMICROBIUM-MANGANICUM OXIDES COMMUNITIES ADSORPTION KINETICS SPORES
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47864
Collection中国科学院饮用水科学与技术重点实验室
Corresponding AuthorShi, Baoyou
Affiliation1.Chinese Acad Sci, Key Lab Drinking Water Sci & Technol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
2.Zhuhai Water Environm Holdings Grp Ltd, Zhuhai 519000, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Guiwei,Su, Yuliang,Wu, Bin,et al. Initial Formation and Accumulation of Manganese Deposits inDrinking Water Pipes: Investigating the Role of Microbial-Mediated Processes[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(9):5497-5507.
APA Li, Guiwei.,Su, Yuliang.,Wu, Bin.,Han, Guohang.,Yu, Jianwei.,...&Shi, Baoyou.(2022).Initial Formation and Accumulation of Manganese Deposits inDrinking Water Pipes: Investigating the Role of Microbial-Mediated Processes.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(9),5497-5507.
MLA Li, Guiwei,et al."Initial Formation and Accumulation of Manganese Deposits inDrinking Water Pipes: Investigating the Role of Microbial-Mediated Processes".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.9(2022):5497-5507.
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