| One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment | |
| Yu, Ling; Zhang, Yong; Xu, Lili; Liu, Qinyi; Borjigin, Baoleerhu; Hou, Deyin; Xiang, Jun; Wang, Jun | |
| 2020-11-01 | |
| Source Publication | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| ISSN | 1383-5866 |
| Volume | 250Pages:1-14 |
| Abstract | In order to enhance the membrane separation efficiency of multivalent metal ions and acid, high performance Janus acid-resistant nanofiltration membranes (NFMs) with opposite charge properties (selective layer) were fabricated by polyethyleneimine (PEI) and cyanuric chloride (CC) via interfacial polymerization. A novel and facile method (named LC-CT) was developed to obtain the Janus acid-resistant NFMs in one step, by controlling the organic phase (CC) concentration to be low followed by the curing treatment. It was found that CC concentration had a significant effect on the charge property of the membrane surface. Low CC concentration endowed a loose selective layer with many unreacted -NH2 on the flip side while curing treatment attributed to the less defective layer. Thus, LC-CT method endowed the membrane Janus property with high salt rejection and flux. The new generated Janus NFMs exhibited better acid stability than NFM-1 (commercial, polyamide), and higher MgCl2 rejection than NFM-1 and NFM-2 (commercial, acid-resistant) after soaking in 3 wt% HCl at 25 degrees C for 1800 h or 50 degrees C for 72 h. Also, the flux of this polyamine Janus NFM was 4.2 similar to 19 times higher than that of previous reported polyamine acid-resistant NFMs, which indicated a good application potential of this membrane in acidic wastewater treatment. |
| Department | 环境水质学国家重点实验室 |
| Keyword | Polyamine Low pH stable Curing treatment Dually charged surface |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/44970 |
| Collection | 环境水质学国家重点实验室 |
| Recommended Citation GB/T 7714 | Yu, Ling,Zhang, Yong,Xu, Lili,et al. One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,250:1-14. |
| APA | Yu, Ling.,Zhang, Yong.,Xu, Lili.,Liu, Qinyi.,Borjigin, Baoleerhu.,...&Wang, Jun.(2020).One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment.SEPARATION AND PURIFICATION TECHNOLOGY,250,1-14. |
| MLA | Yu, Ling,et al."One step prepared Janus acid-resistant nanofiltration membranes with opposite surface charges for acidic wastewater treatment".SEPARATION AND PURIFICATION TECHNOLOGY 250(2020):1-14. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| One step prepared Ja（2193KB） | 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