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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Degradation of Dipyrone by Electrogenerated H2O2 Combined with Fe2+ Using a Modified Gas Diffusion Electrode

Full text
Author(s):
Barros, Willyam R. P. [1] ; Borges, Michelle P. [1] ; Steter, Juliana R. [1] ; Forti, Juliane C. [2] ; Rocha, Robson S. [1] ; Lanza, Marcos R. V. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Paulo - Brazil
[2] Univ Estadual Paulista, BR-17602496 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of the Electrochemical Society; v. 161, n. 14, p. H867-H873, 2014.
Web of Science Citations: 3
Abstract

The aim of the present study was to investigate the electrochemical degradation of dipyrone in a single compartment electrochemical cell equipped with a gas diffusion electrode (GDE) modified with cobalt (II) phthalocyanine. Degradations were performed under conditions of anodic oxidation (GDE pressurized with N-2) and under conditions promoting the electrogeneration of H2O2 (GDE pressurized with O-2) both in the absence and presence of 1 mmol FeSO4.7H2O (electro-Fenton conditions). The efficiency of the electro-Fenton process was satisfactory at all studied potentials, and achieved a maximum reduction of 67% in electrolyte absorbance at 262 nm after 90 min electrolysis at -0.7 V (vs. Ag/ AgCl). The reduction in dipyrone concentration attained 95% after 90 min of reaction with electrogenerated H2O2 in the absence or presence of Fe2+ ions at all potentials except -0.5 V (vs. Ag/ AgCl). The removal of total organic carbon (TOC) was most efficient under electro-Fenton conditions with a decrease of 54.4% in organic load attained at -0.9 V (vs. Ag/AgCl) and energy consumption (EC) of 270 kWh per kg of TOC removed. (C) 2014 The Electrochemical Society. All rights reserved. (AU)

FAPESP's process: 07/04759-0 - Gas diffusion electrodes modified by organometallic compounds for hydrogen peroxide production
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Regular Research Grants
FAPESP's process: 11/01694-0 - Study of dipyrone degradation in electrochemical reactor using gas diffusion electrode modified
Grantee:Michele de Sousa Prado
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 09/15357-6 - Study of organophosphorus pesticides degradation using advanced oxidative process by electrogenerated H2O2 in modified gas diffusion electrodes
Grantee:Robson da Silva Rocha
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/08588-1 - Electrochemical/chemical treatment of wastewater containing antibiotics (sulfamethoxazole and trimethoprim) with gas diffusion electrode modified with redox catalyst
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Regular Research Grants
FAPESP's process: 11/06681-4 - Application of advanced oxidation processes (AOP) from in situ electrogeneration H2O2 for the degradation of food dyes: amaranth, Tartrazine, Brilliant Blue FCF and fast green
Grantee:Willyam Róger Padilha Barros
Support type: Scholarships in Brazil - Doctorate