Dos Santos, Alexsandro JhonesSirés Sadornil, IgnacioBrillas, Enric2020-09-182022-09-072020-09-070045-6535https://hdl.handle.net/2445/170748Model solutions of bisphenol A (BPA) in 0.050 M Na2SO4 at pH 3.0 have been treated by the electro/Fe2+/persulfate process. The activation of 5.0 mM persulfate with 0.20 mM Fe2+ yielded a mixture of sulfate radical anion (SO4*- ) and * OH, although quenching tests revealed the prevalence of the former species as the main oxidizing agent. In trials run in an IrO2/carbon-felt cell, 98.4% degradation was achieved alongside 61.8% mineralization. The energy consumption was 253.9 kWh (kg TOC) -1, becoming more cost-effective as compared to cells with boron-doped diamond and Pt anodes. Carbon felt outperformed stainless steel as cathode because of the faster Fe2+ regeneration. All BPA concentration decays agreed with a pseudo-fist-order kinetics. The effect of persulfate, Fe2+ and BPA concentrations as well as of the applied current on the degradation process was assessed. Two dehydroxylated and three hydroxylated monobenzenic by-products appeared upon SO4*- and * OH attack, respectively. The analogous treatment of BPA spiked into urban wastewater yielded a faster degradation and mineralization due to the cogeneration of HClO and the larger *OH production as SO4*- reacted with Cl- .14 p.application/pdfengcc-by-nc-nd (c) Elsevier Ltd, 2020http://creativecommons.org/licenses/by-nc-nd/3.0/esDepuració d'aigües residualsContaminants emergents en l'aiguaPurification of sewageEmerging contaminants in waterinfo:eu-repo/semantics/article7033452020-09-18info:eu-repo/semantics/openAccess