Decolorization of Acid Red 1 by Fenton-like process using rice husk ash-based catalyst

Abstract

The decolorization of Acid Red 1 (AR1) in aqueous solution was investigated by Fenton-like process. The effect of different reaction parameters such as different iron ions loading on rice husk ash (RHA), dosage of catalyst, initial pH, the initial hydrogen peroxide concentration ([H 2O 2] o), the initial concentration of AR1 ([AR1] o) and the reaction temperature on the decolorization of AR1 was studied. The optimal reacting conditions were found to be 0.070 wt.% of iron (III) oxide loading on RHA, dosage of catalyst = 5.0 g L −1, initial pH = 2.0, [H 2O 2] o = 8 mM, [AR1] o = 50 mg L −1 at temperature 30 °C. Under optimal condition, 96% decolorization efficiency of AR1 was achieved within 120 min of reaction.