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Title: | Degradation of herbicide S-metolachlor by electrochemical AOPs using a boron-doped diamond anode |
Author: | Guelfi, Diego Roberta de Vieira Gozzi, Fábio Machulek Jr., Amílcar Sirés Sadornil, Ignacio Brillas, Enric De Oliveira, Silvio César |
Keywords: | Oxidació electroquímica Depuració d'aigües residuals Electrolytic oxidation Purification of sewage |
Issue Date: | 2018 |
Publisher: | Elsevier B.V. |
Abstract: | The 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. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.cattod.2017.10.026 |
It is part of: | Catalysis Today, 2018, vol. 313, p. 182-188 |
URI: | http://hdl.handle.net/2445/152898 |
Related resource: | https://doi.org/10.1016/j.cattod.2017.10.026 |
ISSN: | 0920-5861 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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