Modification de la texture d’un support de membrane par des oxydes et application dans la filtration des rejets liquides

Abstract

The ceramic products are extremely interesting in the field of the membrane supports because of their mechanical resistance, chemical inertia, long working life and thermal stability. Research is currently directed towards the exploitation of materials at a lower cost. The purpose of this work is the development of modified ceramic support based on kaolin for liquid waste processing. Tests of filtration of methylene blue solutions, of cadmium solution and lead solutions were performed on modified support which was synthesized starting from a natural local barbotine. The latter was mixed with aluminium oxide. Filtration is of tangential type under an applied pressure of 5 bar. The study of the water flow and filtration though the supports made it possible to highlight a variations of retention rate various from 99 to 100% as function of composition, pore diameter, ion interaction and molecular weight.