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

作　　者：Jiefeng Pan Wei Zhang Huimin Ruan Jiangnan Shen Congjie Gao 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2019年第4期857-862,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Key Research and Development Plan(Nos.2017YFC0403700 and 2017YFD0400604)

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 SO42-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 of40 m A·cm^-2, a current efficiency of 72%, an energy consumption of 1.6 k W·h·kg^-1 Na Cl 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 SO42-by ED using the monovalent selective AEMs.The industrial products or wastewater rich in the mixed salts(Cl-/SO42-) 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 SO42-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 of40 m A·cm-2, a current efficiency of 72%, an energy consumption of 1.6 k W·h·kg-1 Na Cl and a Cl-/SO42-concentration(67.5/3.5 g·L-1) were obtained. Hence, it is appropriate and effective to separate Cl-and SO42-by ED using the monovalent selective AEMs.

关 键 词：ELECTRODIALYSIS SEPARATION of the mixed SALTS Monovalent SELECTIVE AEMs Ion SEPARATION 

分 类 号：TQ[化学工程]