Research on Electrodialytic Processes

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications for Water Treatment".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 2114

Special Issue Editors


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Department of Chemical and Nuclear Engineering (IEC Group, ISIRYM), Universitat Politècnica de València, Valencia, Spain
Interests: wastewater treatment; water treatment; water and wastewater treatment; separation processes; separation technologies; electrodialysis; Donnan dialysis; ion exchange membrane; chronopotentiometry; electrochemical membrane evaluation; concentration polarization; electroconvection; water dissociation; water splitting; over-limiting ion transfer mechanisms
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Guest Editor
Departmet of Chemical and Nuclear Engineering (IEC Group, ISIRYM), Universitat Politècnica de València, 46022 València, Spain
Interests: wastewater treatment; water treatment; water and wastewater treatment; separation processes; separation technologies; electrodialysis; donnan dialysis; ion-exchange membrane; chronopotentiometry; electrochemical membrane evaluation; concentration polarization; electroconvection; water dissociation; water splitting; overlimiting ion transfer mechanisms; cyclic voltammetry; electrodeposition; electrochemical impedance spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electrodialysis is a mature separation technique in which ions migrate through electromembranes that are selective to cations or anions. Due to its versatility, electrodialysis has become a multifunctional process that is applied in several fields, such as seawater desalination, the treatment of various industrial wastewaters, as well as the production of food, medicines, biopolymers, ultrapure water, acids, and alkali. The main advantages of electrodialytic processes include their ability to extract and recover valuable components and the fact that, in most situations, it is not necessary to add reagents to the solution for treatment. On the other hand, the costs of ion exchange membranes and energy consumption are relatively high, besides the maintenance to mitigate the negative effects caused by fouling phenomena. Therefore, to ensure the economical and technical viability of electrodialytic processes, it is crucial that studies are carried out in order to 1) develop new membranes that are more selective to certain types of ions and present lower electrical resistance and costs (monopolar, bipolar, mosaic, amphoteric, monovalent selective ones, etc.), 2) develop new spacer configurations to promote turbulence at the membranes and intensify the ion transfer rate, 3) propose new layouts that reduce the total resistance of the system, 4) evaluate methods to mitigate fouling occurrence and 5) membrane cleaning procedures that extend their lifespan, 6) evaluate the impact of over-limiting mechanisms on membranes and the practical viability of operating the separation processes at over-limiting current regimes, and 7) propose hybrid processes that overcome the limitations faced in each of the processes when operated separately, among other things. This Special Issue serves as a platform gathering all recent advances in the broad scope of electrodialytic processes: Articles, case studies, reviews, and communications are welcome and are held in high regard.

Dr. Kayo Santana Barros
Prof. Dr. Valentín Pérez-Herranz
Guest Editors

Manuscript Submission Information

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Keywords

  • electrodialysis
  • electro-electrodialysis
  • electrodialysis with bipolar membrane
  • electrodialysis reversal
  • fouling
  • concentration polarization at electro membranes
  • electroconvection

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Published Papers (2 papers)

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Research

16 pages, 1713 KiB  
Article
Theoretical Study of the Influence of Electroconvection on the Efficiency of Pulsed Electric Field (PEF) Modes in ED Desalination
by Victor Nikonenko, Aminat Uzdenova, Anna Kovalenko and Makhamet Urtenov
Membranes 2024, 14(11), 225; https://doi.org/10.3390/membranes14110225 - 27 Oct 2024
Viewed by 607
Abstract
Pulsed electric field (PEF) modes of electrodialysis (ED) are known for their efficiency in mitigating the fouling of ion-exchange membranes. Many authors have also reported the possibility of increasing the mass transfer/desalination rate and reducing energy costs. In the literature, such possibilities were [...] Read more.
Pulsed electric field (PEF) modes of electrodialysis (ED) are known for their efficiency in mitigating the fouling of ion-exchange membranes. Many authors have also reported the possibility of increasing the mass transfer/desalination rate and reducing energy costs. In the literature, such possibilities were theoretically studied using 1D modeling, which, however, did not consider the effect of electroconvection. In this paper, the analysis of the ED desalination characteristics of PEF modes is carried out based on a 2D mathematical model including the Nernst–Planck–Poisson and Navier–Stokes equations. Three PEF modes are considered: galvanodynamic (pulses of constant electric current alternate with zero current pauses), potentiodynamic (pulses of constant voltage alternate with zero voltage pauses), and mixed galvanopotentiodynamic (pulses of constant voltage alternate with zero current pauses) modes. It is found that at overlimiting currents, in accordance with previous papers, in the range of relatively low frequencies, the mass transfer rate increases and the energy consumption decreases with increasing frequency. However, in the range of high frequencies, the tendency changes to the opposite. Thus, the best characteristics are obtained at a frequency close to 1 Hz. At higher frequencies, the pulse duration is too short, and electroconvective vortices, enhancing mass transfer, do not have time to develop. Full article
(This article belongs to the Special Issue Research on Electrodialytic Processes)
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22 pages, 2866 KiB  
Article
Targeted Anthocyanin Enrichment of Cranberry Juice by Electrodialysis with Filtration Membranes: Impact of Filtration Membrane Physicochemical Properties and Predictive Statistical Models
by Eva Revellat and Laurent Bazinet
Membranes 2024, 14(5), 111; https://doi.org/10.3390/membranes14050111 - 14 May 2024
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Abstract
To optimize cranberry juice enrichment, correlation between physicochemical properties of filtration membranes (FM) and anthocyanin migration was investigated during electrodialysis with filtration membranes (EDFM) using redundancy (RDA) and multivariate regression (MRGA) analyses. Six polyether sulfone (PES) and polyvinylidene fluoride (PVDF) membranes with molecular [...] Read more.
To optimize cranberry juice enrichment, correlation between physicochemical properties of filtration membranes (FM) and anthocyanin migration was investigated during electrodialysis with filtration membranes (EDFM) using redundancy (RDA) and multivariate regression (MRGA) analyses. Six polyether sulfone (PES) and polyvinylidene fluoride (PVDF) membranes with molecular weight cut-offs between 150 and 500 kDa, commercially available at large scale, were characterized in terms of nine physicochemical characteristics and used for EDFM. The highest migration of total anthocyanin was obtained with PVDF 250 kDa, with a global migration rate of 3.5 ± 0.4 g/m2·h. RDA showed that two FM properties (mesopore porosity and hydrophilic porosity) were significantly negatively correlated to the anthocyanin’s migration and explained 67.4% of their total variation in migration. Predictive MRGA models were also developed for each anthocyanin based on these significant FM properties. A combination of intermolecular interactions may lead to binding in a cooperative and synergistic mode and hinder the anthocyanin migration. Full article
(This article belongs to the Special Issue Research on Electrodialytic Processes)
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