SYNTHESIS AND CHARACTERIZATION OF Al/Fe PILLARED SEPIOLITE FOR CWPO OF METHYL ORANGE

Abstract

In this study, Al/Fe pillared sepiolite catalysts withdifferent Fe/(Al+Fe) molar ratios were synthesized for catalytic wet peroxideoxidation (CWPO) of methyl orange azo dye. Furthermore, the catalysts werecharacterized by BET, XRD, XRF and SEM-EDX techniques. The catalysts were veryefficient in the methyl orange oxidation reaction in diluted aqueous mediumunder mild experimental conditions (25°C and atmospheric pressure). 90.68%methyl orange elimination was achieved at 4 hours of reaction time under theconditions of 0.1 g/100 mL for catalyst dosage, 8% for active metal ratio,500°C for calcination temperature, 3.7 for pH, 0.15 M for H2O2concentration and 25°C for temperature. Meanwhile, low loss of Fe species wasobserved on all of the catalysts.