LAUSR

Abstract Three different advanced oxidation processes, electrochemical oxidation (EO), electro-Fenton (EF) and photoelectro-Fenton (PEF) were tested for the treatment of individual and mixed solutions of Bismark Brown G, Bismark Brown R and Brown DGI dyes. The experiments were performed in a 500 mL stirred undivided cell with a 25 cm2 BDD anode, using 0.050 M Na2SO4 as electrolyte and pH 3.0. The cathodes used for the different processes were a stainless-steel plate in EO and another BDD electrode in EF and PEF. In the two latter processes, pumped air was bubbled for H2O2 generation and 0.50 mM Fe2+ was added as the Fenton's reagent. For PEF, the solution was irradiated using an UVA lamp. The oxidation power of the processes increased in the order: EO