SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (6): 912-918.DOI: 10.1016/j.cjche.2015.01.005

• 分离科学与工程 • 上一篇    下一篇

Surface modification of polypiperazine-amide membrane by self-assembled method for dye wastewater treatment

Yong Zhou1,2, Zhenan Dai1, Ding Zhai1, Congjie Gao1   

  1. 1 The Development Center of Water Treatment Technology, State Oceanic Administration, Hangzhou 310012, China;
    2 Zhejiang Sci-Tech University, Hangzhou 310018, China
  • 收稿日期:2014-03-12 修回日期:2015-01-22 出版日期:2015-06-28 发布日期:2015-07-09
  • 通讯作者: Yong Zhou
  • 基金资助:

    Support by the National High Technology Research and Development Program of China (863 Program) (2012AA03A608) and the Open Foundation of Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (YR2012012).

Surface modification of polypiperazine-amide membrane by self-assembled method for dye wastewater treatment

Yong Zhou1,2, Zhenan Dai1, Ding Zhai1, Congjie Gao1   

  1. 1 The Development Center of Water Treatment Technology, State Oceanic Administration, Hangzhou 310012, China;
    2 Zhejiang Sci-Tech University, Hangzhou 310018, China
  • Received:2014-03-12 Revised:2015-01-22 Online:2015-06-28 Published:2015-07-09
  • Contact: Yong Zhou
  • Supported by:

    Support by the National High Technology Research and Development Program of China (863 Program) (2012AA03A608) and the Open Foundation of Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (YR2012012).

摘要: Polypiperazine-amide membranes were modified with poly(ethyleneimine) (PEI) by self-assembled method, through which PEI molecules were fixed on the membrane surface by ionic interaction. In the experiments, the PEI concentration ranged from50 to 2000 mg·L-1 while the depositing time was fixed at 20 min. The results showed that low PEI concentration resulted in a slight increase of pure water flux, which was attributed to the enhanced membrane surface hydrophilicity. The PEI adsorption on membrane surface had less effect on the rejections to neutral PEG and sucrose, but improved the rejections to divalent cationic ions and methylene blue as the result of reversion of the membrane surface charge from negative to positive according to the XPS analysis and zeta potential measurements. The membrane modified at PEI = 1500 mg·L-1 exhibited high rejection to methylene blue (MB) and is potential to be applied in the treatment of effluents containing positively charged dyes.

关键词: Surface modification, Polypiperazine-amide, Self-assembled, Nanofiltration membrane

Abstract: Polypiperazine-amide membranes were modified with poly(ethyleneimine) (PEI) by self-assembled method, through which PEI molecules were fixed on the membrane surface by ionic interaction. In the experiments, the PEI concentration ranged from50 to 2000 mg·L-1 while the depositing time was fixed at 20 min. The results showed that low PEI concentration resulted in a slight increase of pure water flux, which was attributed to the enhanced membrane surface hydrophilicity. The PEI adsorption on membrane surface had less effect on the rejections to neutral PEG and sucrose, but improved the rejections to divalent cationic ions and methylene blue as the result of reversion of the membrane surface charge from negative to positive according to the XPS analysis and zeta potential measurements. The membrane modified at PEI = 1500 mg·L-1 exhibited high rejection to methylene blue (MB) and is potential to be applied in the treatment of effluents containing positively charged dyes.

Key words: Surface modification, Polypiperazine-amide, Self-assembled, Nanofiltration membrane