Influence of the reactor configuration and the supporting electrolyte concentration on the electrochemical oxidation of Atenolol using BDD and SnO2 ceramic electrodes
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INVESTIGACIONMetadatos
Título
Influence of the reactor configuration and the supporting electrolyte concentration on the electrochemical oxidation of Atenolol using BDD and SnO2 ceramic electrodesAutoría
Fecha de publicación
2020Editor
ElsevierISSN
1383-5866; 1873-3794Cita bibliográfica
MORA-GÓMEZ, J., et al. Influence of the reactor configuration and the supporting electrolyte concentration on the electrochemical oxidation of Atenolol using BDD and SnO2 ceramic electrodes. Separation and Purification Technology, 2020, vol. 241, p. 116684.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S1383586619346040Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Electrochemical oxidation of β-blocker atenolol (ATL, 100 ppm) at different
applied current densities (33, 50 and 83 mA·cm-2) using a reactor divided by an
ion-exchange membrane and an undivided one was investigated. ... [+]
Electrochemical oxidation of β-blocker atenolol (ATL, 100 ppm) at different
applied current densities (33, 50 and 83 mA·cm-2) using a reactor divided by an
ion-exchange membrane and an undivided one was investigated. Two types of
anodes were used for this purpose: a boron-doped diamond (BDD) anode and
new low-cost ceramic electrodes made of tin dioxide doped with antimony (Sbdoped SnO2). Degradation was assessed using a high performance liquid
chromatography, while mineralization by measuring total organic carbon (TOC)
dissolved in sample. Except for the lowest current density, ATL was completely degraded for both reactors and electrodes. The highest percentage of TOC
eliminated (89%) was obtained at the highest applied current density with the
BDD electrode in the divided reactor. The presence of the cation-exchange
membrane prevented the reduction of both the electrogenerated oxidizing
species and the oxidized organic compounds and enhances the electro-oxidation
kinetic reaction.
In order to study the influence of the supporting electrolyte, three different
concentrations of sodium sulfate (0.014, 0.05 and 0.1 M) were tested in the
undivided reactor with both electrodes. The results showed that an increase in
the concentration of the supporting electrolyte improves the mineralization of ATL
for the BDD electrode and, on the contrary, worsens for the ceramic electrode.
Accelerated service life tests were carried out for the ceramic electrode at 100
mA·cm-2 in 0.5 M H2SO4. Ecotoxicity tests using marine bacteria (Vibrio Fischeri)
revealed that no toxic by-products were formed in any case. [-]
Publicado en
Separation and Purification Technology, 2020, vol. 241, p. 116684Proyecto de investigación
The authors thank the financial support from the Ministerio de Economía y Competitividad (Spain) under the project RTI2018-101341-B-C21, co-financed with FEDER funds.Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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