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

Shudi Mao; Ling Chen; Yi Zhang; Zhe Li; Zhuobiao Ni; Zhuo Sun; Ran Zhao

doi:10.1016/j.jcis.2019.02.093

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

Shudi Mao, Ling Chen, Yi Zhang, Zhe Li, Zhuobiao Ni, Zhuo Sun, Ran Zhao

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

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 MgSO ₄ can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO ₄ .

Original language	English
Pages (from-to)	321-328
Number of pages	8
Journal	Journal of Colloid and Interface Science
Volume	544
DOIs	https://doi.org/10.1016/j.jcis.2019.02.093
State	Published - 15 May 2019

Keywords

Capacitive deionization
Ion fractionation
Modified Donnan model
Nanofiltration

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10.1016/j.jcis.2019.02.093

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title = "Fractionation of mono- and divalent ions by capacitive deionization with nanofiltration membrane",

abstract = " 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 MgSO 4 can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO 4 .",

keywords = "Capacitive deionization, Ion fractionation, Modified Donnan model, Nanofiltration",

author = "Shudi Mao and Ling Chen and Yi Zhang and Zhe Li and Zhuobiao Ni and Zhuo Sun and Ran Zhao",

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AU - Mao, Shudi

AU - Chen, Ling

AU - Zhang, Yi

AU - Li, Zhe

AU - Ni, Zhuobiao

AU - Sun, Zhuo

AU - Zhao, Ran

PY - 2019/5/15

Y1 - 2019/5/15

N2 - 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 MgSO 4 can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO 4 .

AB - 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 MgSO 4 can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO 4 .

KW - Capacitive deionization

KW - Ion fractionation

KW - Modified Donnan model

KW - Nanofiltration

UR - https://www.scopus.com/pages/publications/85062680991

U2 - 10.1016/j.jcis.2019.02.093

DO - 10.1016/j.jcis.2019.02.093

M3 - 文章

C2 - 30861437

AN - SCOPUS:85062680991

SN - 0021-9797

VL - 544

SP - 321

EP - 328

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

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

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Keywords

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