Catalytic degradation of reactive yellow dye using ash fly supported iron ion
粉煤灰负载铁离子催化氧化活性黄染料废水

Ash fly supported iron ion catalyst was prepared by using ash fly as a carrier. Its catalysis effect on oxidizing reactive yellow dye by H2O2 was studied. And the effects of dosage of H2O2, catalyst loading, initial reactive yellow concentration and solution pH on the removal rate of COD and the discoloration rate were investigated. The results show that the removal rate of COD and the discoloration rate can reach 63% and 99%, respectively under the optimal conditions of initial COD concentration of 200 mg/L, pH of 1.7, catalyst of 0.5 g/100 mL and 1.13 mol/L H2O2 of 1.0 mL,and the biodegradability of the wastewater can be greatly improved. The residues of Fe3+ in aqueous solutions can be reduced effectively when using the supported catalysts.