Acid Red 1 dye decolorization by heterogeneous Fenton-like reaction using Fe/kaolin catalyst

In this work, the decolorization of Acid Red 1 (AR1) by Fe (III) oxide-kaolin catalyst was studied. The effects of iron (III) oxide loading on kaolin, catalyst dosage, pH and initial concentration of hydrogen peroxide (H2O2) on decolorization of AR1 were studied. The best catalytic results showed that at a reaction temperature of 30°C, pH 3.0, 8.0mM of H2O2 and 4.0g/L of 0.080wt.% Fe-kaolin, 98.46% decolorization was achieved within 240min treatment. It was also observed that catalytic behaviour could be reproduced in consecutive experiments with low iron leaching. ►The catalytic efficiency of kaolin supported iron (III) oxide was examined for decolorization of Acid Red 1.►Fe-kaolin catalyst exhibit good catalytic activity.►The catalytic behaviour could be reproduced in consecutive experiments with low iron leaching.