Predicting the filtration performances
of ultrafiltration ceramic membranes
by streaming potentials measurements.
Application to removal of salts in liquid effluents
H. Loukili1*, S. Alami Younssi1, A. Albizane1, M. Bouhria1, M. Persin2; A. larbot2
1Laboratoire des Matériaux, Catalyse et Environnement, Faculté des Sciences et Techniques
de Mohammedia, BP 146 Mohammedia (20650) Maroc
* Corresponding author. E-mail: email@example.com
Received: 29 September 2006; revised version accepted: 13 February 2007
This paper reports the dynamic characterizations of a ZnAl2O4-TiO2 (50/50) membrane deposited on a macroporous support prepared from Moroccan clay coated with a zirconia microfiltration interlayer. The water permeability of the membrane is 10.4 L/h.m².bar, its thickness is less than 700 nm with an average pore diameter of 5 nm, and a cut-off about 4500 Da. The mechanism of the rejection with salts solutions of Na2HPO4, NaCH3COO and NaF by low ultrafiltration membrane depends at on the pH, on ionic strength of the solution; their interpretation needs to precise the exact speciation of the filtered species.
Keywords: Ultrafiltration; Ceramic membrane; Streaming potential; Salt retention.