NOM fouling resistance in response to electric field during electro-ultrafiltration: Significance of molecular polarity and weight
文献类型：期刊论文
| 作者 | Hu, Chengzhi; Li, Mengqi; Sun, Jingqiu ; Liu, Ruiping; Liu, Huijuan; Qu, Jiuhui
|
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2019-03-15 |
| 卷号 | 539页码:11-18 |
| 关键词 | Membrane Humic acid Electric field Ultrafiltration Electrochemical |
| ISSN号 | 0021-9797 |
| 英文摘要 | Electro ultrafiltration is an effective method for mitigating membrane fouling. Herein, anti fouling mechanisms for the electro-ultrafiltration of natural organic matter (NOM) were investigated to illuminate the significance of NOM molecular polarity and weight. Results indicated that the membrane flux of NOM electro-ultrafiltration was greatly enhanced by electric field (EF) application, and that the increase in membrane flux magnitude for electro-ultrafiltration was more pronounced for NOM with higher hydrophilicity and larger molecular weight. The electro-ultrafiltration flux of the hydrophilic substances in NOM was enhanced by up to 20% after applying the voltage. The enhancement of membrane flux was more prominent for the electro-ultrafiltration of humic acid (HA) solution with high ionic strength and coexisting Ca2+. With increasing EF strength in the electro-ultrafiltration of HA, membrane flux increased at first due to the electrokinetic migration of negatively charged HA, and then declined for fields larger than the critical EF, where electro-ultrafiltration reached maximum flux. The HA molecules became polarized under a high EF, which induced aggregation between the molecules and increased affinity between HA and the membrane. This facilitated the formation of a dense cake layer, leading to relatively severe membrane fouling under EF strengths larger than the critical EF. (C) 2018 Elsevier Inc. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/43101]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Chengzhi,Li, Mengqi,Sun, Jingqiu,et al. NOM fouling resistance in response to electric field during electro-ultrafiltration: Significance of molecular polarity and weight[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,539:11-18. |
| APA | Hu, Chengzhi,Li, Mengqi,Sun, Jingqiu,Liu, Ruiping,Liu, Huijuan,&Qu, Jiuhui.(2019).NOM fouling resistance in response to electric field during electro-ultrafiltration: Significance of molecular polarity and weight.JOURNAL OF COLLOID AND INTERFACE SCIENCE,539,11-18. |
| MLA | Hu, Chengzhi,et al."NOM fouling resistance in response to electric field during electro-ultrafiltration: Significance of molecular polarity and weight".JOURNAL OF COLLOID AND INTERFACE SCIENCE 539(2019):11-18. |
入库方式： OAI收割
来源：生态环境研究中心
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