Comparison of two electrokinetic methods – electroosmosis and streaming potential – to determine the zeta-potential of plane ceramic membranes

Electroosmotic flow rate and streaming potential measurements are used to characterise electrokinetic properties of plane ceramic membranes. The study is carried out at different pH, ionic strengths and electrolytes. Effects of pH and ionic strength are studied for both techniques which lead to very...

Full description

Saved in:
Bibliographic Details
Published in:Journal of membrane science 1998-05, Vol.143 (1), p.189-195
Main Authors: Szymczyk, A, Fievet, P, Mullet, M, Reggiani, J.C, Pagetti, J
Format: Article
Language:English
Subjects:
Ceramic membranes
Chemical Sciences
Chemistry
Colloidal state and disperse state
Electroosmosis
Environmental Sciences
Exact sciences and technology
General and physical chemistry
Membranes
Streaming potential
Zeta-potential
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Electroosmotic flow rate and streaming potential measurements are used to characterise electrokinetic properties of plane ceramic membranes. The study is carried out at different pH, ionic strengths and electrolytes. Effects of pH and ionic strength are studied for both techniques which lead to very close values of isoelectric points. The specific adsorption of Ca 2+ cations is observed with the two methods. For identical pH and ionic strength electroosmosis gives greater zeta-potential values than those determined from streaming potential measurements. The gap between the two methods increases as the pH move of the isoelectric point and ionic strength increases. These results suggest that the location of the shearing plane depends on the electrokinetic method used.
ISSN:0376-7388
1873-3123
DOI:10.1016/S0376-7388(97)00340-2