Electroconductance of heterogeneous ion-exchange membranes in aqueous salt solutions

Нифталиев, С. И.; Козадерова, О. А.; Kim, K. B.

doi:10.1016/j.jelechem.2017.03.046

Cited by 17 publications

(12 citation statements)

References 8 publications

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“…1. As is seen, the water transport numbers through the membrane increase in the series of cations K + < Na + < Li + [11][12][13][14], which is in agreement with published data, and the specific electric conductivity of the membrane decreases in this order. Table 2 presents the values of the crystallographic radii r cr , radii of solvated ions r s , hydration numbers h, and mobilities λ 0 of alkali metal ions in aqueous solutions.…”

Section: Resultssupporting

confidence: 88%

The Influence of the Counterion Nature on the Electroosmotic Transport of Free Solvent through an MK-40 Ion-Exchange Membrane

Фалина

Demina

Zabolotsky

2019

Membr. Membr. Technol.

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The influence of the counterion nature on the electroosmotic transport of the free solvent through an MK-40 membrane in alkali metal chloride solutions has been experimentally studied. The proportion of free water in the total electroosmotic flux for Li + , Na + , and K + cations has been evaluated. The experimental data on the electrotransport and physicochemical characteristics of the MK-40 membrane are used to calculate the transport numbers of free water in terms of the capillary model of electroosmotic transport of free water. The electroosmotic permeability depends on the ionic form of the MK-40 membrane due to the changes in the portion of through mesopores inside the membrane. When the concentration of the solution is greater than 1 mol/L, there is almost no free-water transfer across the heterogeneous membrane, and the water transport numbers are determined by the primary hydration numbers of ions in the solution.

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Section: Resultssupporting

confidence: 88%

The Influence of the Counterion Nature on the Electroosmotic Transport of Free Solvent through an MK-40 Ion-Exchange Membrane

Фалина

Demina

Zabolotsky

2019

Membr. Membr. Technol.

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“…The microheterogeneous model developed by Gnusin, Nikonenko, Zabolotskii et al [ 59 , 144 ] seems to be the most suitable for real membrane systems. It is widely used in the literature [ 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 ] to interpret the experimental concentration dependences of membrane conductivity and diffusion permeability, and to determine the relationship of the “structure–transport properties” of IEMs. The model is based on a simplified representation of the IEM structure, according to which the membrane can be considered as a multiphase (in the simplest case, two-phase) system.…”

Section: Main Results Obtained During the Period 2012–2022mentioning

confidence: 99%

Research on Membranes and Their Associated Processes at the Université Paris-Est Créteil: Progress Report, Perspectives, and National and International Collaborations

et al. 2023

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Research on membranes and their associated processes was initiated in 1970 at the University of Paris XII/IUT de Créteil, which became in 2010 the University Paris-Est Créteil (UPEC). This research initially focused on the development and applications of pervaporation membranes, then concerned the metrology of ion-exchange membranes, then expanded to dialysis processes using these membranes, and recently opened to composite membranes and their applications in production or purification processes. Both experimental and fundamental aspects have been developed in parallel. This evolution has been reinforced by an opening to the French and European industries, and to the international scene, especially to the Krasnodar Membrane Institute (Kuban State University—Russia) and to the Department of Chemistry, (Qassim University—Saudi Arabia). Here, we first presented the history of this research activity, then developed the main research axes carried out at UPEC over the 2012–2022 period; then, we gave the main results obtained, and finally, showed the cross contribution of the developed collaborations. We avoided a chronological presentation of these activities and grouped them by theme: composite membranes and ion-exchange membranes. For composite membranes, we have detailed three applications: highly selective lithium-ion extraction, bleach production, and water and industrial effluent treatments. For ion-exchange membranes, we focused on their characterization methods, their use in Neutralization Dialysis for brackish water demineralization, and their fouling and antifouling processes. It appears that the research activities on membranes within UPEC are very dynamic and fruitful, and benefit from scientific exchanges with our Russian partners, which contributed to the development of strong membrane activity on water treatment within Qassim University. Finally, four main perspectives of this research activity were given: the design of autonomous and energy self-sufficient processes, refinement of characterization by Electrochemical Scanning Microscopy, functional membrane separators, and green membrane preparation and use.

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“…The microheterogeneous model developed by Gnusin, Nikonenko, Zabolotskii et al [68,74,93] seems to be the most suitable for real membrane systems. It is widely used in the literature [14,48,70,75,[94][95][96][97][98][99] to interpret the experimental concentration dependences of membrane conductivity, diffusion permeability, and to determine the relationship "structure-transport properties" of IEMs. The model is based on a simplified representation of the IEM structure, according to which the membrane can be considered as a multiphase (in the simplest case, two-phase) system.…”

Section: Modellingmentioning

confidence: 99%

A Review on Ion-Exchange Membranes Fouling during Electrodialysis Process in Food Industry, Part 2: Influence on Transport Properties and Electrochemical Characteristics, Cleaning and Its Consequences

et al. 2021

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Ion-exchange membranes (IEMs) are increasingly used in dialysis and electrodialysis processes for the extraction, fractionation and concentration of valuable components, as well as reagent-free control of liquid media pH in the food industry. Fouling of IEMs is specific compared to that observed in the case of reverse or direct osmosis, ultrafiltration, microfiltration, and other membrane processes. This specificity is determined by the high concentration of fixed groups in IEMs, as well as by the phenomena inherent only in electromembrane processes, i.e., induced by an electric field. This review analyzes modern scientific publications on the effect of foulants (mainly typical for the dairy, wine and fruit juice industries) on the structural, transport, mass transfer, and electrochemical characteristics of cation-exchange and anion-exchange membranes. The relationship between the nature of the foulant and the structure, physicochemical, transport properties and behavior of ion-exchange membranes in an electric field is analyzed using experimental data (ion exchange capacity, water content, conductivity, diffusion permeability, limiting current density, water splitting, electroconvection, etc.) and modern mathematical models. The implications of traditional chemical cleaning are taken into account in this analysis and modern non-destructive membrane cleaning methods are discussed. Finally, challenges for the near future were identified.

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Electroconductance of heterogeneous ion-exchange membranes in aqueous salt solutions

Cited by 17 publications

References 8 publications

The Influence of the Counterion Nature on the Electroosmotic Transport of Free Solvent through an MK-40 Ion-Exchange Membrane

The Influence of the Counterion Nature on the Electroosmotic Transport of Free Solvent through an MK-40 Ion-Exchange Membrane

Research on Membranes and Their Associated Processes at the Université Paris-Est Créteil: Progress Report, Perspectives, and National and International Collaborations

A Review on Ion-Exchange Membranes Fouling during Electrodialysis Process in Food Industry, Part 2: Influence on Transport Properties and Electrochemical Characteristics, Cleaning and Its Consequences

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