Photodegradation of reactive dyes by UV/Ferrioxalate/H2O2 system

Three types of simulated commercial reactive dye wastewater, separately prepared with FN-2BL red, C-R blue and C-2R yellow, were oxidized with UV/ferrioxalate/H 2 O 2 system, especially by the introduction of Fe 2 + ion. The experimental results show that the optimized experimental conditions are pH = 3.5, [Fe 2 + ] = 1mM, H 2 O 2 782 mg/L for FN-2BL red and C-R blue and H 2 O 2 646mg/L for C-2R yellow, t = 4h and T = 80°C when the concentration of dye is 400mg/L. Under such conditions, the observed COD and color removal efficiencies are above 94% and 99%, respectively for all the cases. This investigation has provided fundamental information for the treatment of wastewater containing reactive dyes using UV/ ferrioxalate/H 2 O 2 .