Oxidative decolorization of Acid Red 1 solutions by Fe-zeolite Y type catalyst

A study of the decolorization of azo dye, Acid Red 1 (AR1), in an aqueous solution using Fe-zeolite Y type (Fe-ZYT) catalyst has been carried out. The effects of different reaction parameters such as initial iron ions loading on zeolite Y type (ZYT), catalyst dosage, solution pH and initial concentration of H2O2, dye solution and reaction temperature on the decolorization of AR1 were studied. The best reacting conditions were 0.80 wt.% of iron ions loading on ZYT, catalyst dosage = 2.50 g/L, initial pH = 2.5, [H2O2](o) = 16 mM, and [AR1](o) = 50 mg/L at temperature 30 degrees C. Under these conditions, 99% decolorization efficiency of AR1 was achieved within 60 min of reaction time. The results indicated that Fe-ZYT was a promising catalyst for the heterogeneous Fenton system. (C) 2011 Elsevier B.V. All rights reserved.