Guelfi, Diego Roberta de VieiraGozzi, FábioMachulek Jr., AmílcarSirés Sadornil, IgnacioBrillas, EnricDe Oliveira, Silvio César2020-03-172020-12-3120180920-5861https://hdl.handle.net/2445/152898The degradation and mineralization ability of electrochemical processes like electro-oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and UVA-assisted photoelectro-Fenton (PEF) has been comparatively studied for solutions of the herbicide S-metolachlor. Solutions of 100 mL have been treated using an undivided cell equipped with an air-diffusion cathode and a boron-doped diamond (BDD) anode. The effect of pH, current density, and Fe2+ and S-metolachlor concentration has been thoroughly studied. The total organic carbon removal profiles have demonstrated the feasibility of almost overall mineralization by EF and PEF after 9 h at 300 mA. The herbicide decays in both treatments informed about the complexation of Fe(III) ions formed from Fenton's reaction, which decelerated S-metolachlor removal. However, the high oxidation power of BDD anode allowed the gradual mineralization of such complexes. The identification of chlorinated and non-chlorinated degradation byproducts by GC-MS has allowed the proposal of main degradation routes.7 p.application/pdfengcc-by-nc-nd (c) Elsevier B.V., 2018http://creativecommons.org/licenses/by-nc-nd/3.0/esOxidació electroquímicaDepuració d'aigües residualsElectrolytic oxidationPurification of sewageinfo:eu-repo/semantics/article6810342020-03-17info:eu-repo/semantics/openAccess