| Study on dye desalination by positively charged nanofiltration membrane |
| Authors: LI Xia1,2, YUE Xianyang1,2, YANG Hongying1,2, WANG Qing1,2, MEI Songlin1, ZHANG Qiushi1, WU Jianchao1, WU Wanhua1 |
| Units: Zhongyuan University of Technology, Zhengzhou 450007, China; 2Henan Collaborative Innovation Center of Textile and Garment Industry, Zhengzhou 450007, China |
| KeyWords: nanofiltration membrane; positively charged; dye desalination; antifouling |
| ClassificationCode:TQ028.8 |
| year,volume(issue):pagination: 2020, 40(5):62-69 |
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Abstract: |
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The self-made positively charged guanidine nanofiltration membrane was used for dye desalination. Results showed that the retention rate of congo red and reactive blue 19 with higher molecular weight was higher than 95% and 90%, respectively, followed by methyl orange with lower molecular weight. The retention of NaCl and Na2SO4 by the membrane is low, which indicated that the membrane can effectively separate dye and salt. The concentration of dyes and salts has an important effect on the separation performance of the membrane. With the increase of dye concentration, the membrane flux decreased, while the retention of congo red and NaCl changed little, the retention of methyl orange, reactive blue 19 and Na2SO4 increased slightly. The increase of inorganic salt concentration had little effect on the membrane flux, but led to the decrease of the rejections of dye and salt. For three simulated pollution systems, including congo red-NaCl, methyl orange-NaCl and reactive Blue 19-NaCl, after four pollution-cleaning cycles, all of the membrane showed relatively high fluxes, which demonstrated that the membrane had satisfactory antifouling performance. Furthermore, the membrane maintained good stability in the long-term filtration operation of methyl orange-NaCl system for 24 h. |
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Funds: |
| 中国纺织工业联合会科技指导性计划项目(2018069);河南省科技攻关项目(182102310660);河南省高等学校重点科研项目(20B610008);河南省质量技术监督局科技计划项目(2019NQ05) |
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AuthorIntro: |
| 李霞(1985-),女,河南新乡,博士,讲师,从事聚合物膜的制备与应用研究,E-mail:lixiapiaoyi@163.com |
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Reference: |
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[1] Makhetha T A, Moutloali R M, Antifouling properties of Cu (tpa) @GO/PES composite membranes and selective dye rejection [J]. J Membr Sci, 2018, 554: 195-210. |
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