| 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: | 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 11/01694-0 - Study of dipyrone degradation in electrochemical reactor using gas diffusion electrode modified |
| Grantee: | Michele de Sousa Prado |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| 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 Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 07/04759-0 - Gas diffusion electrodes modified by organometallic compounds for hydrogen peroxide production |
| Grantee: | Marcos Roberto de Vasconcelos Lanza |
| Support Opportunities: | Regular Research Grants |
| 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 Opportunities: | Regular Research Grants |