Mineralization of an azo dye Acid Red 14 by electro-Fenton's reagent using an activated carbon fiber cathode

In this paper, the comparison of activated carbon fiber (ACF) felt and graphite cathode suggested H2O2 might effectively be electrogenerated from O2 reduction on the large surface area ACF felt cathode, this was more adaptive for electro-Fenton process. The removal of color and total organic carbon (TOC) from simulated dye wastewater containing Acid Red 14 (AR14) was experimentally investigated using electro-Fenton reaction with ACF cathode. After 360 min of electrolysis and under the operation conditions of 0.36 A current, 1 mM Fe2+ at pH 3, 70% TOC was removed as well as complete decolorization occurred. The effect of Fe2+ ion concentration and applied current were also studied in detail in the experimental runs.