Russian Journal of Electrochemistry

, Volume 41, Issue 11, pp 1205–1210 | Cite as

Rate of Generation of Ions H+ and OH at the Ion-Exchange Membrane/Dilute Solution Interface as a Function of the Current Density

  • V. V. Nikonenko
  • N. D. Pis'menskaya
  • E. I. Volodina
Article

Abstract

Partial currents of water dissociation products through cation- and anion-exchange membranes that form thin desalination channels in electrodialyzers are measured. The investigations are performed in a broad interval of flow rates during desalination of dilute sodium chloride solutions at overlimiting currents. A water dissociation theory, which was developed for bipolar membranes, and a mass transfer theory that allows for the space charge formation at overlimiting currents are used to derive an expression, according to which the rate of generation of the H+ and OH ions is defined by the ratio of the current density to its critical value at which water starts undergoing discernible dissociation.

Key words

ion-exchange membrane generation of ions H+ and OH concentration polarization 

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Copyright information

© MAIK "Nauka/Interperiodica" 2005

Authors and Affiliations

  • V. V. Nikonenko
    • 1
  • N. D. Pis'menskaya
    • 1
  • E. I. Volodina
    • 1
  1. 1.Kuban State UniversityKrasnodarRussia

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