Effect of modification of a sulfonic cation-exchange membrane with cross-linked chitosan on the selectivity of the transport of magnesium and calcium ions relative to sodium ions

Greben, V. P.; Rodzik, I. G.; Kolzunova, L. G.

doi:10.1134/s1070427211030244

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Specifically, the selectivity of monovalent cations is more pronounced when an adsorbed layer possessing a positive charge is established on a CEM that carries pendant sulfonates due to a stronger electrostatic repulsion of multivalent counter-ions. For example, Greben and co-workers [ 81 ] reported the transport of Mg 2+ , Ca 2+ , and Na + metal ions through a CEM modified with a single layer of chitosan, followed by crosslinking with epichlorohydrin, producing a positively charged surface. After modification, the ion selectivity ratios of Na + /Ca 2+ and Na + /Mg 2+ were improved from 0.45 and 0.84 to 1.82 and 1.79, respectively.…”

Section: Cem Membrane Preparation For Metal Ion Selectivitymentioning

confidence: 99%

“…Specifically, the selectivity of monovalent cations is more pronounced when an adsorbed layer possessing a positive charge is established on a CEM that carries pendant sulfonates due to a stronger electrostatic repulsion of multivalent counter-ions. For example, Greben and co-workers [81] reported the transport of Mg 2+ , Ca 2+ , and Na + metal ions through a CEM modified with a single layer of chitosan, followed by crosslinking with Polyaniline is a cationic conductive polymer that possesses good chemical stability in an acidic medium and can be readily prepared from aniline. Reig et al [74] reported the synthesis of a monovalent selective CEM by surface polymerization of polyaniline on a polyvinylidene fluoride/sulfonated polyvinylidene fluoride (PVDF/sPVDF) membrane in the presence of p-toluene sulfonic acid or L-valine (2-amino-3-methylbutanoic acid).…”

Section: Direct Coating Of Charged Polymersmentioning

confidence: 99%

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Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

et al. 2023

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The selective separation of metal species from various sources is highly desirable in applications such as hydrometallurgy, water treatment, and energy production but also challenging. Monovalent cation exchange membranes (CEMs) show a great potential to selectively separate one metal ion over others of the same or different valences from various effluents in electrodialysis. Selectivity among metal cations is influenced by both the inherent properties of membranes and the design and operating conditions of the electrodialysis process. The research progress and recent advances in membrane development and the implication of the electrodialysis systems on counter-ion selectivity are extensively reviewed in this work, focusing on both structure–property relationships of CEM materials and influences of process conditions and mass transport characteristics of target ions. Key membrane properties, such as charge density, water uptake, and polymer morphology, and strategies for enhancing ion selectivity are discussed. The implications of the boundary layer at the membrane surface are elucidated, where differences in the mass transport of ions at interfaces can be exploited to manipulate the transport ratio of competing counter-ions. Based on the progress, possible future R&D directions are also proposed.

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Section: Cem Membrane Preparation For Metal Ion Selectivitymentioning

confidence: 99%

“…Specifically, the selectivity of monovalent cations is more pronounced when an adsorbed layer possessing a positive charge is established on a CEM that carries pendant sulfonates due to a stronger electrostatic repulsion of multivalent counter-ions. For example, Greben and co-workers [81] reported the transport of Mg 2+ , Ca 2+ , and Na + metal ions through a CEM modified with a single layer of chitosan, followed by crosslinking with Polyaniline is a cationic conductive polymer that possesses good chemical stability in an acidic medium and can be readily prepared from aniline. Reig et al [74] reported the synthesis of a monovalent selective CEM by surface polymerization of polyaniline on a polyvinylidene fluoride/sulfonated polyvinylidene fluoride (PVDF/sPVDF) membrane in the presence of p-toluene sulfonic acid or L-valine (2-amino-3-methylbutanoic acid).…”

Section: Direct Coating Of Charged Polymersmentioning

confidence: 99%

Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

et al. 2023

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“…Greben et al . conducted a surface modification of CEM by solution casting and crosslinking in order to enhance the monovalent‐ion permselectivity of the CEM.…”

Section: Surface‐modified Ion‐exchange Membranesmentioning

confidence: 99%

Surface modification of ion‐exchange membranes: Methods, characteristics, and performance

Khoiruddin

Ariono

Subagjo

et al. 2017

J of Applied Polymer Sci

109

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Considerable effort has been made to improve ion-exchange membrane (IEM) properties in order to achieve better performance of IEM-based processes in various applications. Surface modification is one of the effective ways to improve IEM properties. Various methods have been used to modify IEM surfaces, for example, plasma treatment, polymerization, solution casting, electrodeposition, and ion implantation. These methods are able to produce a thin and fine distributed layer and also to modify the chemical structure of the surface. The new layer can be adsorbed, deposited, or chemically bonded on a membrane surface. By using these methods, IEM properties are improved, and the desired or specific characteristics such as high monovalent ion permselectivity, low fuel crossover, and anti-organic-fouling property can be obtained. In this paper, methods for surface modification of IEMs are reviewed. Moreover, the effects of modification on IEM properties and performance are discussed.

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On the permselectivity of di- and mono-valent cations: Influence of applied current density and ionic species concentration

Dong

Yao

Wang³

et al. 2020

Desalination

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Effect of modification of a sulfonic cation-exchange membrane with cross-linked chitosan on the selectivity of the transport of magnesium and calcium ions relative to sodium ions

Cited by 4 publications

References 9 publications

Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

Surface modification of ion‐exchange membranes: Methods, characteristics, and performance

On the permselectivity of di- and mono-valent cations: Influence of applied current density and ionic species concentration

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