Fractionation of mono- and divalent ions by capacitive deionization with nanofiltration membrane

被引：25
作者：
Mao, Shudi [1 ]
Chen, Ling [1 ]
Zhang, Yi [1 ]
Li, Zhe [1 ]
Ni, Zhuobiao [2 ]
Sun, Zhuo [1 ]
Zhao, Ran [1 ]
机构：
[1] East China Normal Univ, Engn Res Ctr Nanophoton & Adv Instrument, Minist Educ, Sch Phys & Mat Sci, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China
[2] Sun Yat Sen Univ, Sch Environm Sci & Engn, 135 Xingang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2019年 / 544卷
基金：
中国国家自然科学基金;
关键词：
Ion fractionation; Capacitive deionization; Nanofiltration; Modified Donnan model; CARBON ELECTRODES; DESALINATION; ELECTRODIALYSIS; LITHIUM; SEPARATION; MONOVALENT; RECOVERY; WATER; SELECTIVITY; SEAWATER;
D O I：
10.1016/j.jcis.2019.02.093
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, we demonstrated the influence of adding nanofiltration membranes to a CDI cell, when desalinating mono- and divalent salt solutions both theoretically and experimentally, and proposed a new procedure for the separation of mono- and divalent ions. It is revealed that the distinction of the diffusion coefficient between mono- and divalent ions is the key to the effective separation. Combined with the appropriate time of adsorption (1.5 h), the concentration ratio of NaCl to MgSO4 can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO4. (C) 2019 Elsevier Inc. All rights reserved.
引用
收藏
页码：321 / 328
页数：8
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