Difference in transfer of magnesium and sodium ions through electrodialytic membranes modified with chitosan

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

doi:10.1134/s1070427208030129

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…In electro-deposition, a solution (including the modifier) is exposed to an electrical field by applying an electrical potential to the electrodes that attract the oppositely charged modifier, thereby depositing on the membrane surface inside the cell [ 83 ]. Greben et al [ 102 ] examined the effect of the electro-deposition of sulfonic cation exchange heterogeneous membranes with chitosan on the selectivity between Na + and Mg 2+ ions during electrodialysis. The selectivity of the modified membrane with single-layer chitosan was found to be up to 3.3.…”

Section: Cem Membrane Preparation For Metal Ion Selectivitymentioning

confidence: 99%

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%

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

et al. 2023

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“…In addition, Thakur et al designed a novel modified method through controlled metal (Cu) loading on poly(2-acrylamido-2-methyl-propane-sulfonic acid) CEM by electro-less plating, and the optimized membrane exhibited extremely low Zn 2+ leakage owing to the excellent pore-size sieving effect [ 25 ]. A series of CEMs modified by chitosan hydrochloride according to electrodepositing and coating respectively achieved high-efficient Na + /Mg 2+ separation in optimized conditions, which depended on the synergetic effect of pore-size sieving and electrostatic repulsion [ 26 ]. Based on this synergetic effect, Pang et al prepared novel modified sulfonated polyphenylsulphone (SPPSU) CEMs by in situ polymerization-deposited polyaniline followed by quaternizing with methyl iodide and the adjustment of positive charge density of the modification layer by controlling the degree of quaternization leading to prominent permselectivity for the Na + /Mg 2+ and Li + /Mg 2+ mixture [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity

Yang

Liu

et al. 2021

Membranes

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Developing monovalent cation permselective membranes (MCPMs) with high-efficient permselectivity is the core concern in specific industrial applications. In this work, we have fabricated a series of novel cation exchange membranes (CEMs) based on sulfonated polysulfone (SPSF) surface modification by polyethyleneimine (PEI) and 4′-aminobenzo-12-crown-4 (12C4) codeposited with dopamine (DA) successively, which was followed by the cross-linking of glutaraldehyde (GA). The as-prepared membranes before and after modification were systematically characterized with regard to their structures as well as their physicochemical and electrochemical properties. Particularly, the codeposition sequence of modified ingredients was investigated on galvanostatic permselectivity to cations. The modified membrane (M-12C4-0.50-PEI) exhibits significantly prominent selectivity to Li+ ions (PMg2+Li+ = 5.23) and K+ ions (PMg2+K+ = 13.56) in Li+/Mg2+ and K+/Mg2+ systems in electrodialysis (ED), which is far superior to the pristine membrane (M-0, PMg2+Li+ = 0.46, PMg2+K+ = 1.23) at a constant current density of 5.0 mA·cm−2. It possibly arises from the synergistic effects of electrostatic repulsion (positively charged PEI), pore-size sieving (distribution of modified ingredients), and specific interaction effect (12C4 ~Li+). This facile strategy may provide new insights into developing selective CEMs in the separation of specific cations by ED.

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Salinity gradient power reverse electrodialysis: Cation exchange membrane design based on polypyrrole-chitosan composites for enhanced monovalent selectivity

Tufa

Piallat

Hnát

et al. 2020

Chemical Engineering Journal

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Difference in transfer of magnesium and sodium ions through electrodialytic membranes modified with chitosan

Cited by 8 publications

References 8 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

Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity

Salinity gradient power reverse electrodialysis: Cation exchange membrane design based on polypyrrole-chitosan composites for enhanced monovalent selectivity

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