Comparaison des bentonites algériennes et commerciales vis-à-vis de l'adsorption du vert malachite.

Abstract

The objective of this study is the removal of dye malachite green by commercial bentonite and Na-Mt using adsorption processus. The influence of certain parameters such as contact time, adsorbent mass, pH of the medium, adsorbate initial concentration and temperature were studied. The results obtained show that the maximum adsorbed amount was around 99.9 mg/g for both adsorbents. The adsorption isotherms are well described by the Freundlich model. The thermodynamic studies showed that the adsorption processus is spontaneous, exothermic and physical