| Numéro |
J. Phys. IV France
Volume 123, March 2005
|
|
|---|---|---|
| Page(s) | 337 - 340 | |
| DOI | https://doi.org/10.1051/jp4:2005123061 | |
J. Phys. IV France 123 (2005) 337-340
DOI: 10.1051/jp4:2005123061
Electrokinetic properties of the fluorinated montmorillonite "rassoul" particles in aqueous medium
A.Khaldoun1, F. González-Caballero2, J.G. López-Durán2, N. Benajiba3 and M.L. Kerkeb31 Van der Waals-Zeeman Institute, University of Amsterdam Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
2 Department of Applied Physics, Faculty of Sciences, University of Granada, 18071 Granada, Spain
3 Department of Physics, Faculty of Sciences, Abdelmalek Essaadi University, 93000 Tetouan, Morocco
Abstract
Rassoul is clay extracted from Atlas Mountains in North Africa,
characterized by its high capacity of adsorption and ionic exchange. The
high stability of the rassoul particles suspension is closely linked to
their capacity to interact by electrostatic and thermodynamic interactions
within the aqueous medium. A fundamental contribution to the energy of
interaction between colloidal particles in suspension is electrostatic. The
aim of this work is to estimate the variation of the potential 
of
the aqueous suspension of Rassoul particles as well as the potential zeta of
edges and faces. We measured the electrophoretic mobility of the suspension
as a function of pH at constant ionic straight of the solution. The zeta
potential were estimated by the means of the sample Helmotz Smoluchowski
equation [1].
© EDP Sciences 2005