KMS of Research Center for Eco-Environmental Sciences， CAS
| Modification Mechanism of Polyamide Reverse Osmosis Membrane by Persulfate: Roles of Hydroxyl and Sulfate Radicals | |
Cheng, Wei ; Xu, Haodan; Wang, Peizhi; Wang, Lihong; Szymczyk, Anthony; Croue, Jean-Philippe; Zhang, Tao
| |
| 2022-06-21 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| ISSN | 0013-936X |
| Volume | 56Issue:12Pages:8864-8874 |
| Abstract | Oxidative modification is a facile method to improve the desalination performance of thin-film composite membranes. In this study, we comparatively investigated the modification mechanisms induced by sulfate radical (SO4' -) and hydroxyl radical (HO') for polyamide reverse osmosis (RO) membrane. The SO4' -- and HO'-based membrane modifications were manipulated by simply adjusting the pH of the thermal-activated persulfate solution. Although both of them improved the water permeability of the RO membrane under certain conditions, the SO4' --modified membrane notably prevailed over the HO'-modified one due to higher permeability, more consistent salt rejection rates over wide pH and salinity ranges, and better stability when exposed to high doses of chlorine. The differences of the membranes modified by the two radical species probably can be related to their distinct surface properties in terms of morphology, hydrophilicity, surface charge, and chemical composition. Further identification of the transformation products of a model polyamide monomer using high-resolution mass spectrometry demonstrated that SO4' - initiated polymerization reactions and produced hydroquinone/benzoquinone and polyaromatic structures; whereas the amide group of the monomer was degraded by HO', generating hydroxyl, carboxyl, and nitro groups. The results will enlighten effective ways for practical modification of polyamide RO membranes to improve desalination performances and the development of sustainable oxidation-combined membrane processes. |
| 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 |
| Keyword | NATURAL ORGANIC-MATTER SURFACE MODIFICATION PHYSIOCHEMICAL PROPERTIES ACTIVE LAYER RO MEMBRANE ANILINE DEGRADATION OXIDATION PERFORMANCE CHEMISTRY |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47878 |
| Collection | 中国科学院饮用水科学与技术重点实验室 |
| Corresponding Author | Zhang, Tao |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, Shenzhen Key Lab Water Resource Applicat & Enviro, Shenzhen 518055, Peoples R China 3.Univ Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, France 4.Univ Poitiers, IC2MP UMR 7285, Inst Chim Milieux & Mat, CNRS, F-86073 Poitiers, France |
| Recommended Citation GB/T 7714 | Cheng, Wei,Xu, Haodan,Wang, Peizhi,et al. Modification Mechanism of Polyamide Reverse Osmosis Membrane by Persulfate: Roles of Hydroxyl and Sulfate Radicals[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(12):8864-8874. |
| APA | Cheng, Wei.,Xu, Haodan.,Wang, Peizhi.,Wang, Lihong.,Szymczyk, Anthony.,...&Zhang, Tao.(2022).Modification Mechanism of Polyamide Reverse Osmosis Membrane by Persulfate: Roles of Hydroxyl and Sulfate Radicals.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(12),8864-8874. |
| MLA | Cheng, Wei,et al."Modification Mechanism of Polyamide Reverse Osmosis Membrane by Persulfate: Roles of Hydroxyl and Sulfate Radicals".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.12(2022):8864-8874. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Modification Mechani（6851KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment