Treatment of azo dye-containing wastewater by a Fenton-like process in a continuous packed-bed reactor filled with activated carbon

► Oxidation with the Fenton's reagent was carried out in a packed-bed reactor. ► The packed-bed was filled with iron-impregnated activated carbon. ► The increment of temperature increases the Chicago Sky Blue removal and mineralization. ► The values of iron leaching were below 0.4 ppm in the outlet effluent. ► It was possible to reach a dye conversion of 88% in steady-state.