Targeting membrane fouling with low dose oxidant in drinking water treatment: Beneficial effect and biological mechanism
文献类型：期刊论文
| 作者 | Zhang, Li; Graham, Nigel; Kimura, Katsuki; Li, Guibai; Yu, Wenzheng
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 209期号:0页码:117953 |
| 关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES DISINFECTION BY-PRODUCTS NATURAL ORGANIC-MATTER POTASSIUM-PERMANGANATE HYDROGEN-PEROXIDE PRETREATMENT ULTRAFILTRATION CHLORINE OSMOSIS UV/H2O2 |
| ISSN号 | 0043-1354 |
| 英文摘要 | Membrane fouling is the principal factor that currently limits the performance of gravity-driven membrane (GDM) filtration systems in drinking water treatment. In this study, the benefits of applying a low dose (approximately 0.1 mg.L- 1) of environmentally benign oxidants, both H2O2 and KMnO4 , as a pretreatment to GDM filtration system has been evaluated in terms of reduced membrane fouling and treated water quality. While both oxidants improved permeate flux, the effect of KMnO4 was greater than H2O2. Both oxidants reduced the size of influent organic substances and those of large molecular weight ( 20 kDa), such as biopolymers, disappeared. The thickness of the fouling layers was substantially reduced after oxidation, and the KMnO4 system had a markedly different physical structure of fouling layer, with an apparent sub-layer of delta-MnO2 nanosheets below a fouling sub-layer. The formation of the delta-MnO2 nanosheets sub-layer appeared to protect the underlying membrane pores from contamination by influent organics. Oxidation pretreatment reduced the presence of proteins and polysaccharides in the fouling layers and significantly altered the bacterial community structures (p < 0.01) and decreased biodiversity. The microbial species that secreted amounts of extracellular polymeric substances (EPS), such as Xanthobacter, were not eliminated in the H2O2 fouling layer, while for the KMnO4 system, the manganese oxidizing bacteria (MOB; e.g., Pseudoxanthomonas) and metal-resistant genus Acidovorax, dominated the community. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47734]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 通讯作者 | Yu, Wenzheng |
| 作者单位 | 1.Hokkaido Univ, Div Environm Engn, Sapporo, Hokkaido 0608628, Japan 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100049, Peoples R China 4.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm SKL, Harbin 15 5.Imperial Coll London, Dept Civil & Environm Engn, South Kensington Campus, London SW7 2AZ, England |
| 推荐引用方式 GB/T 7714 | Zhang, Li,Graham, Nigel,Kimura, Katsuki,et al. Targeting membrane fouling with low dose oxidant in drinking water treatment: Beneficial effect and biological mechanism[J]. WATER RESEARCH,2022,209(0):117953. |
| APA | Zhang, Li,Graham, Nigel,Kimura, Katsuki,Li, Guibai,&Yu, Wenzheng.(2022).Targeting membrane fouling with low dose oxidant in drinking water treatment: Beneficial effect and biological mechanism.WATER RESEARCH,209(0),117953. |
| MLA | Zhang, Li,et al."Targeting membrane fouling with low dose oxidant in drinking water treatment: Beneficial effect and biological mechanism".WATER RESEARCH 209.0(2022):117953. |
入库方式： OAI收割
来源：生态环境研究中心
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