Low-polarisation electrodialysis membranes

O. Kedem, L. Schechtmann, Y. Mirsky, G. Saveliev, N. Daltrophe

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Heterogeneous ion exchange membranes were coated with hydrophilic charged layers. The cation exchange membrane was coated with polyvinylalcohol, crosslinked by a reactive dye containing sulfonic groups. The anion exchange membrane was coated by ground anion exchange particles embedded in polyvinlalcohol crosslinked by hexamethoxymethylmelamin. The coating substantially decreased polarisation on both types of membranes. Suppression of water splitting increased the current efficiency at low salt concentrations. In the concentration range of industrial water production, output and energy consumption of the modified heterogeneous membranes is equal to that of highly permselective homogeneous ones. The improvement of the heterogeneous membranes by the coating is due to suppression of polarization. The polyethylene based membranes are heat sealable.

Original languageEnglish
Pages (from-to)305-314
Number of pages10
Issue number1-3
StatePublished - 20 Sep 1998

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science
  • Water Science and Technology
  • Mechanical Engineering


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