| Improved permeability of tight acid resistant nanofiltration membrane via citric acid post-treatment | |
Yu, Ling; Li, Kuiling ; Zhang, Yong; Wang, Jun; Zhang, Guoliang
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| 2022-04-15 | |
| Source Publication | JOURNAL OF MEMBRANE SCIENCE
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| ISSN | 0376-7388 |
| Volume | 648Issue:0Pages:120381 |
| Abstract | Development of acid resistant nanofiltration membranes (ARNFMs) with high metal rejection, high flux and low molecule weight cut-off (MWCO) remains a big challenge. The separation performance of polyamine ARNFM is partially limited by the dense structure caused by the high concentration of organic phase solution. Herein, in this work, a novel effective post-treatment of citric acid (CA) was utilized to further improve the separation property of dually charged polyamine ARNFMs with low MWCO. An appropriate CA post-treatment (1.5 mol/L, 30 min, 65 degrees C) could gently remove off the oligomers and CA molecules would react with the redundant protonated/non-protonated amino, imine and hydroxyl groups of the polyamine NFM. Therefore,after the post-treatment, the membrane flux was enhanced 7.1 times with a high MgCl2 rejection (97.6%) and a low MWCO around 220 Da. Furthermore, CA post-treatment not only had no significant influence on the acid stability of this membrane, but would also protect the membrane from the drastic effect of HCl (hydrolyze-Cl into -OH) in turn. All the results indicated that CA post-treatment has positive effects on polyamine ARNFMs, and the resulted dually charged polyamine ARNFMs have a good application potential for acidic wastewater treatment. |
| Department | 环境水质学国家重点实验室 ; 环境水质学国家重点实验室 |
| Keyword | CELLULOSE-BASED HYDROGELS FILM COMPOSITE MEMBRANE NAPHTHALENE-1,3,6-TRISULFONYLCHLORIDE NTSC INTERFACIAL POLYMERIZATION PH POLYETHYLENEIMINE POLYSULFONAMIDE CHLORIDE LAYER |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47704 |
| Collection | 环境水质学国家重点实验室 |
| Corresponding Author | Wang, Jun |
| Affiliation | 1.Zhejiang Univ Technol, Inst Ocean & Environm Chem Engn, Ctr Membrane & Water Sci & Technol, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310014, Zhejiang, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Yu, Ling,Li, Kuiling,Zhang, Yong,et al. Improved permeability of tight acid resistant nanofiltration membrane via citric acid post-treatment[J]. JOURNAL OF MEMBRANE SCIENCE,2022,648(0):120381. |
| APA | Yu, Ling,Li, Kuiling,Zhang, Yong,Wang, Jun,&Zhang, Guoliang.(2022).Improved permeability of tight acid resistant nanofiltration membrane via citric acid post-treatment.JOURNAL OF MEMBRANE SCIENCE,648(0),120381. |
| MLA | Yu, Ling,et al."Improved permeability of tight acid resistant nanofiltration membrane via citric acid post-treatment".JOURNAL OF MEMBRANE SCIENCE 648.0(2022):120381. |
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