Abstract
Membrane charge is fundamental to the separation of ions from a membrane and is a major factor in the separation efficiency of ultrafiltration, nanofiltration, and reverse osmosis membranes. Characterization of the charge properties of membranes can be performed using a variety of different methods. In this chapter, the electrokinetic phenomena of electrophoresis, electro-osmosis, sedimentation potential, and streaming potential are described. Each of these methods is capable of measuring the zeta potential of the membrane in a given electrolyte solution and has been discussed. The fundamental basis of each of the methods is provided and theoretical descriptions are provided. The streaming potential method is the most commonly employed method for the characterization of membrane charge and this technique is described in detail. Typical commercial equipment is shown and discussed and a set of experimental results is provided to illustrate the methodology.
Original language | English (US) |
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Title of host publication | Membrane Characterization |
Publisher | Elsevier Inc. |
Pages | 405-422 |
Number of pages | 18 |
ISBN (Electronic) | 9780444637918 |
ISBN (Print) | 9780444637765 |
DOIs | |
State | Published - Feb 20 2017 |
Keywords
- Elector-osmosis
- Electrophoresis
- Membrane charge
- Sedimentation potential
- Streaming potential
- Zeta potential
ASJC Scopus subject areas
- General Engineering
- General Chemical Engineering