Three-Dimensional Analysis of the Natural-Organic-Matter Distribution in the Cake Layer to Precisely Reveal Ultrafiltration Fouling Mechanisms
文献类型：期刊论文
| 作者 | Wu, Siqi ; Hua, Xin; Ma, Baiwen; Fan, Hongwei; Miao, Rui; Ulbricht, Mathias; Hu, Chengzhi; Qu, Jiuhui
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-04-20 |
| 卷号 | 55期号:8页码:5442-5452 |
| 关键词 | drinking water treatment ultrafiltration cake-layer structure three-dimensional analysis membrane fouling behavior |
| ISSN号 | 0013-936X |
| 英文摘要 | Cake layer formation is the dominant ultrafiltration membrane fouling mechanism after long-term operation. However, precisely analyzing the cake-layer structure still remains a challenge due to its thinness (micro/nano scale). Herein, based on the excellent depth-resolution and foulant-discrimination of time-of-flight secondary ion mass spectrometry, a three-dimensional analysis of the cake-layer structure caused by natural organic matter was achieved at lower nanoscale for the first time. When humic substances or polysaccharides coexisted with proteins separately, a homogeneous cake layer was formed due to their interactions. Consequently, membrane fouling resistances induced by proteins were reduced by humic substances or polysaccharides, leading to a high flux. However, when humic substances and polysaccharides coexisted, a sandwich-like cake layer was formed owing to the asynchronous deposition based on molecular dynamics simulations. As a result, membrane fouling resistances were superimposed, and the flux was low. Furthermore, it is interesting that cake-layer structures were relatively stable under common UF operating conditions (i.e., concentration and stirring). These findings better elucidate membrane fouling mechanisms of different natural-organic-matter mixtures. Moreover, it is demonstrated that membrane fouling seems lower with a more homogeneous cake layer, and humic substances or polysaccharides play a critical role. Therefore, regulating the cake-layer structure by feed pretreatment scientifically based on proven mechanisms should be an efficient membrane-fouling-control strategy. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46269]  |
| 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.Univ Duisburg Essen, Lehrstuhl Tech Chem 2, D-45117 Essen, Germany 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 4.Southeast Univ, Sch Chem & Chem Engn, Jiangsu Engn Lab Smart Carbon Rich Mat & Device, Nanjing 211189, Peoples R China 5.East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China 6.Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany |
| 推荐引用方式 GB/T 7714 | Wu, Siqi,Hua, Xin,Ma, Baiwen,et al. Three-Dimensional Analysis of the Natural-Organic-Matter Distribution in the Cake Layer to Precisely Reveal Ultrafiltration Fouling Mechanisms[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(8):5442-5452. |
| APA | Wu, Siqi.,Hua, Xin.,Ma, Baiwen.,Fan, Hongwei.,Miao, Rui.,...&Qu, Jiuhui.(2021).Three-Dimensional Analysis of the Natural-Organic-Matter Distribution in the Cake Layer to Precisely Reveal Ultrafiltration Fouling Mechanisms.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(8),5442-5452. |
| MLA | Wu, Siqi,et al."Three-Dimensional Analysis of the Natural-Organic-Matter Distribution in the Cake Layer to Precisely Reveal Ultrafiltration Fouling Mechanisms".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.8(2021):5442-5452. |
入库方式： OAI收割
来源：生态环境研究中心
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