Abstract
A modified method to measure ion fluxes and effective ion transport numbers across an anion-exchange membrane is proposed in this work. This method involves the hydrodynamic isolation of the membrane from the interfering effect of processes that occur in membranes localized on both sides of the studied membrane–adjacent solution system. Unlike the well-known method of the hydrodynamic isolation of the studied membrane, the proposed method provides an experimental determination of the fluxes and transport numbers across an anion-exchange membrane for all ions, particularly in an asymmetric system, in which solutions localized on both sides of the studied membrane have different compositions. The possibilities of the proposed method are shown using the example of the sulfuric acid solution|anion-exchange membrane|solution containing diethylamine and diethylammonium sulfate system.
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Funding
This work was supported by the Russian Foundation for Basic Research, project no. 17-08-01689.
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Translated by M. Timoshinina
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Sheldeshov, N.V., Zabolotsky, V.I., Karpenko, T.V. et al. A Modified Hydrodynamic Isolation Method to Measure Ion Fluxes and Ion Transport Numbers across an Anion-Exchange Membrane in the Sulfuric Acid–Amine–Amine Salt System. Membr. Membr. Technol. 2, 189–194 (2020). https://doi.org/10.1134/S2517751620030075
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DOI: https://doi.org/10.1134/S2517751620030075