Knowledge Management System Of Institute of process engineering,CAS
| Planting Anion Channels in a Negatively Charged Polyamide Layer for Highly Selective Nanofiltration Separation | |
| Ren, Yuling1; Qi, Pengfei1; Wan, Yinhua3; Chen, Chulong2; Chen, Xiangrong1; Feng, Shichao1; Luo, Jianquan1 | |
| 2022-11-29 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| ISSN | 0013-936X |
| Pages | 12 |
| Abstract | A nanofiltration (NF) membrane with high salt permeation and high retention of small organics is appealing for the treatment of high-salinity organic wastewater. However, the conventional negatively charged NF membranes commonly show high retention of divalent anions (e.g., SO42-), and the reported positively charged NF membranes normally suffer super low selectivity for small organics/Na2SO4 and high fouling potential. In this work, we propose a novel "etching-swelling-planting" strategy assisted by interfacial polymerization and mussel-inspired catecholamine chemistry to prepare a mix charged NF membrane. By X-ray photoelectron spectroscopy depth profiling and pore size distribution analysis, it was found that such a strategy could not only deepen the positive charge distribution but also narrow the pore size. Molecular dynamics confirm that the planted polyethyleneimine chains play an important role to relay SO42- ions to facilitate their transport across the membrane, thus reversing the retention of Na2SO4 and glucose (43 vs 71%). Meanwhile, due to the high surface hydrophilicity and smoothness as well as the preservation of abundant negatively charged groups (-OH and -COOH) inside the separation layer, the obtained membrane exhibited excellent antifouling performance, even for the coking wastewater. This study advances the importance of vertical charge distribution of NF membranes in separation selectivity and antifouling performance. |
| Keyword | nanofiltration highly selective membrane desalination polyamide antifouling performance |
| DOI | 10.1021/acs.est.2c06582 |
| Language | 英语 |
| WOS Keyword | FILM COMPOSITE MEMBRANES ; PERFORMANCE ; THICKNESS ; CARBON |
| Funding Project | National Natural Science Foundation of China ; National Key Research and Development Program of China ; ZheJiang MEY Membrane Technol- ogy Co., Ltd. ; [22278406] ; [2021YFC3201402] |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology |
| WOS Subject | Engineering, Environmental ; Environmental Sciences |
| Funding Organization | National Natural Science Foundation of China ; National Key Research and Development Program of China ; ZheJiang MEY Membrane Technol- ogy Co., Ltd. |
| WOS ID | WOS:000891458600001 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/55948 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Luo, Jianquan |
| Affiliation | 1.Univ Chinese Acad Sci, Inst Proc Engn, Chinese Acad Sci, State Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.ZheJiang MEY Membrane Technol Co Ltd, Hangzhou 310012, Peoples R China 3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341119, Peoples R China |
| Recommended Citation GB/T 7714 | Ren, Yuling,Qi, Pengfei,Wan, Yinhua,et al. Planting Anion Channels in a Negatively Charged Polyamide Layer for Highly Selective Nanofiltration Separation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022:12. |
| APA | Ren, Yuling.,Qi, Pengfei.,Wan, Yinhua.,Chen, Chulong.,Chen, Xiangrong.,...&Luo, Jianquan.(2022).Planting Anion Channels in a Negatively Charged Polyamide Layer for Highly Selective Nanofiltration Separation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,12. |
| MLA | Ren, Yuling,et al."Planting Anion Channels in a Negatively Charged Polyamide Layer for Highly Selective Nanofiltration Separation".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022):12. |
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