Ion exchange membrane adsorption in Donnan dialysis

Anna Breytus, David Hasson, Raphael Semiat, Hilla Shemer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Nitrate contamination of drinking water supplies is of acute public health concern worldwide. Donnan dialysis is a potentially advantageous physiochemical process for nitrate removal from contaminated waters. Investigation of nitrate ion removal by Donnan dialysis using a stripping solution with three different anion exchange membranes (Selemion AMV, Neosepta AMX, Fumasep FAB) revealed that in all cases part of the nitrate was adsorbed by the ion exchange membrane. Experimental data covered a range of Reynolds numbers, using stripping solutions of NaCl and Na2SO4. The level of adsorption is related to the concentration of the stripping solution, the counter ion species and the membrane type. A model is presented which incorporates the adsorption phenomenon in the kinetics of Donnan dialysis and is well supported by the experimental data.

Original languageEnglish
Pages (from-to)252-258
Number of pages7
JournalSeparation and Purification Technology
Volume226
DOIs
StatePublished - 1 Nov 2019

Keywords

  • Flux
  • Ion exchange membrane
  • Kinetics
  • Mass transfer
  • Nitrate

Fingerprint

Dive into the research topics of 'Ion exchange membrane adsorption in Donnan dialysis'. Together they form a unique fingerprint.

Cite this