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Article

Behavior of Embedded Cation-Exchange Particles in a DC Electric Field

1
Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, Prague 16628, Czech Republic
2
New Technologies–Research Centre, University of West Bohemia, Univerzitní 8, Pilsen 30614, Czech Republic
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(14), 3579; https://doi.org/10.3390/ijms20143579
Received: 26 June 2019 / Revised: 17 July 2019 / Accepted: 21 July 2019 / Published: 22 July 2019
(This article belongs to the Special Issue Ion and Molecule Transport in Membrane Systems)
Electrodialysis and electrodeionization are separation processes whose performance depends on the quality and properties of ion-exchange membranes. One of the features that largely affects these properties is heterogeneity of the membranes both on the macroscopic and microscopic level. Macroscopic heterogeneity is an intrinsic property of heterogeneous ion-exchange membranes. In these membranes, the functional ion-exchange component is dispersed in a non-conductive binder. The functional component is finely ground ion-exchange resin particles. The understanding of the effect of structure on the heterogeneous membrane properties and behavior is thus of utmost importance since it does not only affect the actual performance but also the cost and therefore competitiveness of the aforementioned separation processes. Here we study the electrokinetic behavior of cation-exchange resin particle systems with well-defined geometrical structure. This approach can be understood as a bottom up approach regarding the membrane preparation. We prepare a structured cation-exchange membrane by using its fundamental component, which is the ion exchange resin. We then perform an experimental study with four different experimental systems in which the number of used cation-exchange particles changes from 1 to 4. These systems are studied by means of basic electrochemical characterization measurements, such as measurement of current–voltage curves and direct optical observation of phenomena that occur at the interface between the ion-exchange system and the adjacent electrolyte. Our work aims at better understanding of the relation between the structure and the membrane properties and of how structure affects electrokinetic behavior of these systems. View Full-Text
Keywords: ion-exchange membranes; ion-exchange particles; heterogeneity; electrokinetics; current–voltage curves ion-exchange membranes; ion-exchange particles; heterogeneity; electrokinetics; current–voltage curves
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MDPI and ACS Style

Vobecká, L.; Belloň, T.; Slouka, Z. Behavior of Embedded Cation-Exchange Particles in a DC Electric Field. Int. J. Mol. Sci. 2019, 20, 3579. https://doi.org/10.3390/ijms20143579

AMA Style

Vobecká L, Belloň T, Slouka Z. Behavior of Embedded Cation-Exchange Particles in a DC Electric Field. International Journal of Molecular Sciences. 2019; 20(14):3579. https://doi.org/10.3390/ijms20143579

Chicago/Turabian Style

Vobecká, Lucie, Tomáš Belloň, and Zdeněk Slouka. 2019. "Behavior of Embedded Cation-Exchange Particles in a DC Electric Field" International Journal of Molecular Sciences 20, no. 14: 3579. https://doi.org/10.3390/ijms20143579

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