Potential of donnan dialysis water purification processes

David Hasson*, Raphael Semiat, Hilla Shemer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Donnan dialysis is an ions separation process utilizing ion exchange membranes. In this process, a solution of target ionic species is held in a feed compartment separated by an ion exchange membrane from a receiver compartment holding a counter ion stripping solution of high concentration. Migration of counter-ions from the receiver compartment to the feed compartment induces an equivalent counter flow of target ions from the feed to the receiver compartment. The attractive features of Donnan dialysis lie in operational simplicity, low energy requirement and no chemicals requirement. Donnan dialysis holds a potential for many beneficial water purifications encompassing hardness removal and elimination of unwanted ions such as borates, nitrates and arsenates. The objective of the present paper is to describe a simple model enabling characterization of Donnan dialysis systems and to analyze developmental efforts required for enhancing practical application of Donnan dialysis water purification processes.

Original languageEnglish
Pages (from-to)12-17
Number of pages6
JournalDesalination and Water Treatment
Volume69
DOIs
StatePublished - Mar 2017
Externally publishedYes

Keywords

  • Commercialization
  • Design model
  • Donnan dialysis
  • Ion exchange
  • Potential applications

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