Study of catalytic performance for the oxidation of methylene blue using MnO-Clay catalyst with H2O2) [Etude de la performance catalytique pendant l'oxydation du bleu de méthylène en utilisant un catalyseur MnO-Argile en présence de H2O2]

The wet oxidation using hydrogen peroxide combined with a solid catalyst is an efficient method of treating organic waste in dilute aqueous medium. the manganese-based catalysts supported on a moroccan clay has been prepared by an impregnation method in terms of evaluate their catalytic activity. clay (calcite area taounate) was characterized using different techniques such as x-ray fluorescence,x-ray diffraction,scanning electron microscopy and infrared spectroscopy. the experimental results indicated that the used of that system greatly improved the degradation of a cationic dye methylene blue with h2o2. the effects of catalyst dosage,dye concentration and temperature were evaluated; experiments have demonstrated the role of these parameters. although the mno-clay catalysts show higher activity,their stability and susceptibility to reutilize still need improvement.