Improved separation performance and durability of polyamide reverse osmosis membrane in tertiary treatment of textile effluent through grafting monomethoxy-poly(ethylene glycol) brushes 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Separation and Purification Technology
年/卷/期
2019 / 209 /
页码
443-451
ISSN号
1383-5866
作者单位
Zhejiang Sci Tech Univ, Sch Civil Engn & Architecture, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;SOA, Dev Ctr Water Treatment Technol, Hangzhou 310012, Zhejiang, Peoples R China;
作者
Liu, Meihong;Yu, Chuang;Dong, Zhuojun;Jiang, Peng;Lu, Zhenhua;Yu, Sanchuan;Gao, Congjie;
摘要
To improve the separation performance and durability of the aromatic polyamide thin-film composite reverse osmosis membrane in tertiary treatment of textile effluent, grafting of hydrophilic polymer brushes was performed in this work through sequential surface treatment using acidic aqueous glutaraldehyde and monomethoxy-poly(ethylene glycol) (MPEG) solutions. ATR-FTIR and XPS analyses confirmed that MPEG brushes were grafted on membrane surface at the sites of N-H group of amide linkages and end amino groups in the polyamide active layer. The modification was found to enhance membrane fouling resistance, water permeability and rejections to both COD and conductivity in tertiary treatment of textile effluent. The steady-state flux of the modified membrane to secondary textile effluent was higher by 24.0% compared with the virgin membrane and comparable with that of the commercial membrane BW30FR. The grafting of MPEG brushes was also found to make the membrane less susceptible to chlorine. After ten times of intensified chlorine exposure, i.e. total chlorine exposure of 42,000 ppmh NaClO of 35.0 degrees C and pH 9.0, the membrane grafted with MPEG brushes maintained COD and conductivity rejections of 97.9% and 98.5%, respectively, to textile effluent, showing better durability against chlorine than the virgin membrane and compared membrane BW30FR.
机翻摘要
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关键词/主题词
Reverse osmosis;Tertiary treatment of textile effluent;Aromatic polyamide thin-film composite membrane;Separation efficiency;Membrane durability;
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