Efficient Removal of Orange G Using Nano-Fe3[Fe(CN)6]2/gama-Al2O3

DOUMIC, LUCILA; SALIERNO, GABRIEL LEONARDO; CASSANELLO, MIRYAN CELESTE; HAURE, PATRICIA; AYUDE, MARÍA ALEJANDRA

Almería

Congreso; 3rd European Conference on Environmental Applications of Advanced Oxidation Processes; 2013

CIEMAT-SPA / Universidad de Almería

Prussian Blue nanoparticles synthetized and adsorbed onto gamma-Al2O3 spheres were tested as Fenton heterogeneous catalysts. Prepared catalysts were characterized by SEM, EDS and sorptometry. The catalytic activity and stability for oxidation of the model azo dye Orange G were investigated in terms of discolouration, TOC conversion and pH evolution. The effect of initial pH and hydrogen peroxide concentration was addressed. At pH0=3, the presence of H2O2 enhances discolouration rate, but negatively affects the TOC conversion, whereas at pH0=6 the presence of H2O2 does practically not influence the oxidation performance. The catalyst exhibits a moderate and rather progressive loss of activity during each 5h cycle, which could not be attributed to leaching since it occurs in very low extent.