Separation of mixed salts (Cl-/SO42-) by ED based on monovalent anion selective membranes

doi:10.1016/j.cjche.2018.08.007

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (4): 857-862.DOI: 10.1016/j.cjche.2018.08.007

• Separation Science and Engineering • 上一篇下一篇

Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes

Jiefeng Pan^1,2, Wei Zhang¹, Huimin Ruan¹, Jiangnan Shen^1,2, Congjie Gao^1,2

1 Center for Membrane Separation and Water Science & Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, China;
2 Huzhou Institute of Collaborative Innovation Center for Membrane Separation and Water Treatment, Zhejiang University of Technology, 1366 Hongfeng Road, Huzhou 313000, China

收稿日期:2018-03-27 修回日期:2018-07-12 出版日期:2019-04-28 发布日期:2019-06-14
通讯作者: Jiangnan Shen
基金资助:
Supported by the National Key Research and Development Plan (Nos. 2017YFC0403700 and 2017YFD0400604).

Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes

Jiefeng Pan^1,2, Wei Zhang¹, Huimin Ruan¹, Jiangnan Shen^1,2, Congjie Gao^1,2

1 Center for Membrane Separation and Water Science & Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, China;
2 Huzhou Institute of Collaborative Innovation Center for Membrane Separation and Water Treatment, Zhejiang University of Technology, 1366 Hongfeng Road, Huzhou 313000, China

Received:2018-03-27 Revised:2018-07-12 Online:2019-04-28 Published:2019-06-14
Contact: Jiangnan Shen
Supported by:
Supported by the National Key Research and Development Plan (Nos. 2017YFC0403700 and 2017YFD0400604).

摘要/Abstract

摘要： The industrial products or wastewater rich in the mixed salts (Cl^-/SO₄^2-) not only causes the environmental damage, but also induces waste of resource. In this study, an ED stack with monovalent selective AEMs and conventional CEMs was employed to separate the Cl^-and SO₄^2- from simulated wastewater. The effect of current density and mass fraction percentage was investigated in order to optimize the experimental conditions during ED process. It was found that at a concentration ratio between NaCl and Na₂SO₄ of 95/5 (wt%/wt%) and a current density of 40 mA·cm^-2, a current efficiency of 72%, an energy consumption of 1.6 kW·h·kg^-1 NaCl and a Cl^-/SO₄^2- concentration (67.5/3.5 g·L^-1) were obtained. Hence, it is appropriate and effective to separate Cl^-and SO₄^2- by ED using the monovalent selective AEMs.

关键词: Electrodialysis, Separation of the mixed salts, Monovalent selective AEMs, Ion separation

Abstract: The industrial products or wastewater rich in the mixed salts (Cl^-/SO₄^2-) not only causes the environmental damage, but also induces waste of resource. In this study, an ED stack with monovalent selective AEMs and conventional CEMs was employed to separate the Cl^-and SO₄^2- from simulated wastewater. The effect of current density and mass fraction percentage was investigated in order to optimize the experimental conditions during ED process. It was found that at a concentration ratio between NaCl and Na₂SO₄ of 95/5 (wt%/wt%) and a current density of 40 mA·cm^-2, a current efficiency of 72%, an energy consumption of 1.6 kW·h·kg^-1 NaCl and a Cl^-/SO₄^2- concentration (67.5/3.5 g·L^-1) were obtained. Hence, it is appropriate and effective to separate Cl^-and SO₄^2- by ED using the monovalent selective AEMs.

Key words: Electrodialysis, Separation of the mixed salts, Monovalent selective AEMs, Ion separation

Jiefeng Pan, Wei Zhang, Huimin Ruan, Jiangnan Shen, Congjie Gao. Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes[J]. 中国化学工程学报, 2019, 27(4): 857-862.

Jiefeng Pan, Wei Zhang, Huimin Ruan, Jiangnan Shen, Congjie Gao. Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes[J]. Chinese Journal of Chemical Engineering, 2019, 27(4): 857-862.

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Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes

Separation of mixed salts (Cl^-/SO₄^2-) by ED based on monovalent anion selective membranes

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