Mesoporous silica thin films incorporated chitosan mixed matrix nanofiltration membranes for textile wastewater treatment

Yung Sheng Lai, Jingling Yang, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

3 引文 斯高帕斯(Scopus)

摘要

The demand of nanofiltration (NF) membranes for practical and cost-effective environmental treatment is exploding. Mixed matrix membranes (MMMs) have attracted tremendous interest on account of combining the benefits of polymer and inorganic fillers. In this study, mesoporous silica thin films with perpendicular nanochannels (SBA-15(⊥)) incorporated in chitosan (CS) were fabricated for dye wastewater purification. Functional groups, such as amino or epoxy groups were introduced into SBA-15(⊥) (SBA-15(⊥)-NH2, SBA-15(⊥)-Epo) for forming covalent bonds with chitosan matrix to improve their compatibility. The excellent performance in dye/salt fractionation in aqueous solution was demonstrated by SBA-15(⊥)-Epo/CS MMMs, which realized a cut off of 585 g/mol, 99.9% rejection of Congo red, while maintaining 85% permeation of NaCl. In addition, the separation mechanism of the resulting membrane was explored. The efficient NF performance of SBA-15(⊥)-Epo/CS membrane was attributed to its better compatibility between SBA-15(⊥)-Epo and chitosan matrix by virtue of the formation of covalent bonds thus to ensure the high dye rejection, and the vertically oriented nanochannels arrangement facilitated the molecule transportation. This work will inspire feasible synthesis of a new generation of MMMs membranes for dye wastewater purification.

原文英語
頁(從 - 到)451-461
頁數11
期刊Journal of the Chinese Chemical Society
68
發行號3
DOIs
出版狀態已發佈 - 3月 2021
對外發佈

ASJC Scopus subject areas

  • 化學 (全部)

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