Chloramine Prevents Manganese Accumulation in Drinking Water Pipes Compared to Free Chlorine by Simultaneously Inhibiting Abiotic and Biotic Mn(II) Oxidation
文献类型：期刊论文
| 作者 | Li, Guiwei ; Su, Yuliang; Wu, Bin; Chen, Qi; Yu, Jianwei; Yang, Min; Shi, Baoyou
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-09-06 |
| 卷号 | 56期号:17页码:12278-12287 |
| ISSN号 | 0013-936X |
| 关键词 | BOOSTER CHLORINATION MN OXIDES DEPOSITS MONOCHLORAMINE IRON RETHINKING KINETICS GROWTH PB |
| 英文摘要 | The oxidation of residual Mn(II) in finished water can lead to MnOx deposit formation in drinking water pipes. Previous work has illustrated that microbes readily cause Mn deposit build-up in nondisinfected pipes. Here, we investigated how disinfectant type and dose affected Mn(II) oxidation and MnOx accumulation through long-term pipe experiments using water produced by a full- scale water treatment plant. The results showed that Mn(II) oxidation initiated quickly in the new pipes chlorinated with 1.0 mg/L free chlorine. After 130 days of MnOx accumulation, 100 mu g/L Mn(II) in water could drop to 1.0 mu g/L within 1.5 h, resulting from autocatalytic Mn(II) oxidation and Mn(II) adsorption by MnOx deposits accumulated on pipe walls. In contrast to chlorination, chloramination (1.0 mg/L Cl-2) caused almost no MnOx accumulation during the entire study period. The underlying mechanism was probably that monochloramine inhibited microbial Mn(II) oxidation without causing significant abiotic Mn(II) oxidation like free chlorine. A low free chlorine dose (0.3 mg/L) also reduced Mn deposit formation by mass but to a lesser extent than chloramination. After disinfection (chlorination or chloramination) was discontinued for days, biotic Mn(II) oxidation occurred, and this process was inhibited again once disinfection was resumed. In addition, Fe(III) of 200 mu g/L enhanced the stability of MnOx accumulated on pipe surfaces, while humic acid induced MnOx deposit resuspension. Overall, this study highlighted the regulating role of disinfectants in MnOx formation and provided insights into developing appropriate disinfection strategies for Mn deposit control. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47832]  |
| 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 |
| 通讯作者 | Shi, Baoyou |
| 作者单位 | 1.Zhuhai Water Environm Holdings Grp Ltd, Zhuhai 519000, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Guiwei,Su, Yuliang,Wu, Bin,et al. Chloramine Prevents Manganese Accumulation in Drinking Water Pipes Compared to Free Chlorine by Simultaneously Inhibiting Abiotic and Biotic Mn(II) Oxidation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(17):12278-12287. |
| APA | Li, Guiwei.,Su, Yuliang.,Wu, Bin.,Chen, Qi.,Yu, Jianwei.,...&Shi, Baoyou.(2022).Chloramine Prevents Manganese Accumulation in Drinking Water Pipes Compared to Free Chlorine by Simultaneously Inhibiting Abiotic and Biotic Mn(II) Oxidation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(17),12278-12287. |
| MLA | Li, Guiwei,et al."Chloramine Prevents Manganese Accumulation in Drinking Water Pipes Compared to Free Chlorine by Simultaneously Inhibiting Abiotic and Biotic Mn(II) Oxidation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.17(2022):12278-12287. |
入库方式： OAI收割
来源：生态环境研究中心
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