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Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes.
Water Res. 2018 01 01; 128:71-81.WR

Abstract

The electrochemical degradation of tetracaine hydrochloride has been studied in urban wastewater. Treatments in simulated matrix with similar ionic composition as well as in 0.050 M Na2SO4 were comparatively performed. The cell contained an air-diffusion cathode for H2O2 electrogeneration and an anode selected among active Pt, IrO2-based and RuO2-based materials and non-active boron-doped diamond (BDD). Electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF) were comparatively assessed at pH 3.0 and constant current density. The pharmaceutical and its byproducts were oxidized by OH formed from water oxidation at the anode surface and in the bulk from Fenton's reaction, which occurred upon addition of 0.50 mM Fe2+ in all media, along with active chlorine originated from the anodic oxidation of Cl- contained in the simulated matrix and urban wastewater. The PEF process was the most powerful treatment regardless of the electrolyte composition, owing to the additional photolysis of intermediates by UVA radiation. The use of BDD led to greater mineralization compared to other anodes, being feasible the total removal of all organics from urban wastewater by PEF at long electrolysis time. Chlorinated products were largely recalcitrant when Pt, IrO2-based or RuO2-based anodes were used, whereas they were effectively destroyed by BDD(OH). Tetracaine decay always obeyed a pseudo-first-order kinetics, being slightly faster with the RuO2-based anode in Cl- media because of the higher amounts of active chlorine produced. Total nitrogen and concentrations of NH4+, NO3-, ClO3-, ClO4- and active chlorine were determined to clarify the behavior of the different electrodes in PEF. Eight intermediates were identified by GC-MS and fumaric and oxalic acids were quantified as final carboxylic acids by ion-exclusion HPLC, allowing the proposal of a plausible reaction sequence for tetracaine mineralization by PEF in Cl--containing medium.

Authors+Show Affiliations

Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. Electronic address: i.sires@ub.edu.Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. Electronic address: brillas@ub.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29091806

Citation

Ridruejo, Carlota, et al. "Electrochemical Fenton-based Treatment of Tetracaine in Synthetic and Urban Wastewater Using Active and Non-active Anodes." Water Research, vol. 128, 2018, pp. 71-81.
Ridruejo C, Centellas F, Cabot PL, et al. Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes. Water Res. 2018;128:71-81.
Ridruejo, C., Centellas, F., Cabot, P. L., Sirés, I., & Brillas, E. (2018). Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes. Water Research, 128, 71-81. https://doi.org/10.1016/j.watres.2017.10.048
Ridruejo C, et al. Electrochemical Fenton-based Treatment of Tetracaine in Synthetic and Urban Wastewater Using Active and Non-active Anodes. Water Res. 2018 01 1;128:71-81. PubMed PMID: 29091806.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes. AU - Ridruejo,Carlota, AU - Centellas,Francesc, AU - Cabot,Pere L, AU - Sirés,Ignasi, AU - Brillas,Enric, Y1 - 2017/10/23/ PY - 2017/07/20/received PY - 2017/10/18/revised PY - 2017/10/21/accepted PY - 2017/11/2/pubmed PY - 2018/8/1/medline PY - 2017/11/2/entrez KW - BDD KW - Electro-Fenton KW - Photoelectro-Fenton KW - Product identification KW - Tetracaine KW - Urban wastewater SP - 71 EP - 81 JF - Water research JO - Water Res. VL - 128 N2 - The electrochemical degradation of tetracaine hydrochloride has been studied in urban wastewater. Treatments in simulated matrix with similar ionic composition as well as in 0.050 M Na2SO4 were comparatively performed. The cell contained an air-diffusion cathode for H2O2 electrogeneration and an anode selected among active Pt, IrO2-based and RuO2-based materials and non-active boron-doped diamond (BDD). Electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF) were comparatively assessed at pH 3.0 and constant current density. The pharmaceutical and its byproducts were oxidized by OH formed from water oxidation at the anode surface and in the bulk from Fenton's reaction, which occurred upon addition of 0.50 mM Fe2+ in all media, along with active chlorine originated from the anodic oxidation of Cl- contained in the simulated matrix and urban wastewater. The PEF process was the most powerful treatment regardless of the electrolyte composition, owing to the additional photolysis of intermediates by UVA radiation. The use of BDD led to greater mineralization compared to other anodes, being feasible the total removal of all organics from urban wastewater by PEF at long electrolysis time. Chlorinated products were largely recalcitrant when Pt, IrO2-based or RuO2-based anodes were used, whereas they were effectively destroyed by BDD(OH). Tetracaine decay always obeyed a pseudo-first-order kinetics, being slightly faster with the RuO2-based anode in Cl- media because of the higher amounts of active chlorine produced. Total nitrogen and concentrations of NH4+, NO3-, ClO3-, ClO4- and active chlorine were determined to clarify the behavior of the different electrodes in PEF. Eight intermediates were identified by GC-MS and fumaric and oxalic acids were quantified as final carboxylic acids by ion-exclusion HPLC, allowing the proposal of a plausible reaction sequence for tetracaine mineralization by PEF in Cl--containing medium. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/29091806/Electrochemical_Fenton_based_treatment_of_tetracaine_in_synthetic_and_urban_wastewater_using_active_and_non_active_anodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(17)30883-7 DB - PRIME DP - Unbound Medicine ER -