Elaboration d’un matériau argileux et son application dans le traitement des effluents liquides

Abstract

Ceramic support was prepared from kaolin. The characterization of the porous properties and structure of the support synthesis was carried out by Scanning Electron Microscopy (SEM), absorption rate, shrinkage rate and Hg-porosimetry methods. The reliability of support was measured by filtration tests and removal of heavy metals. Filtration studies using ceramic support were performed for solutions containing Methylene blue and Evans blue. The study of the liquid filtration and flow through these supports showed that the Methylene blue rejection rate was 100% while the Congo red rate reached 98% for a 90 minute filtration time under a pressure of 5 bar. We beforehand tested the flow rate for each support with distilled water and the results show that the support of kaolin gave a flux for distilled water of 31.0 L/m2.hr at the pressure of 2 bar. At a pressure of 5 bar an increase in the distilled water flux through the support was observed. The rejection rate of cadmium ions was more significant. A rejection rate of 100% using a 10-4 mol/L solution of this heavy metal for two-hour treatment time was obtained.