| Texto completo | |
| Autor(es): Mostrar menos - |
Aveiro, L. R.
[1]
;
Da Silva, A. G. M.
[2]
;
Candido, E. G.
[2]
;
Antonin, V. S.
[1, 3]
;
Parreira, L. S.
[2]
;
Papai, R.
[1]
;
Gaubeur, I
[1]
;
Silva, Fernando L.
[3]
;
Lanza, V, M. R.
;
Camargo, P. H. C.
[2]
;
Santos, M. C.
[1]
Número total de Autores: 11
|
| Afiliação do(s) autor(es): | [1] Fed Univ ABC, UFABC, Ctr Nat & Human Sci, Lab Electrochem & Nanostruct Mat, BR-09210170 St Andre - Brazil
[2] Univ Sao Paulo, Inst Chem, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
[3] V, Univ Sao Paulo, Inst Chem Sao Carlos, Av Prof Lineu Prestes 748, BR-13560970 Sao Carlos, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Chemosphere; v. 208, p. 131-138, OCT 2018. |
| Citações Web of Science: | 8 |
| Resumo | |
This work describes the electrochemical degradation of Reactive Black 5 (RB5) by two methods: electrochemical and photo-assisted electrochemical degradation with and without a Fenton reagent. Two anodes were used, Pt and boron-doped diamond (BDD, 2500 ppm), and the cathode was 3% MnO2 nanoflowers (NFMnO2) on a carbon gas diffusion electrode (GDE). An electrochemical cell without a divider with a GDE with 3% w/w NFMnO2/C supported on carbon Vulcan XC72 was used. The decolorization efficiency was monitored by UV-vis spectroscopy, and the degradation was monitored by Total Organic Carbon (TOC) analysis. For dissolution monitoring, aliquots (1 mL) were collected during the degradation. After 6 h of H2O2 electrogeneration, the manganese concentration in the RB5 solution was only 23.1 +/- 1.214 mu g L-1. It was estimated that approximately 60 mu g L-1 (<0.2%) of manganese migrated from the GDE to the solution after 12 h of electrolysis, which indicated the good stability of the GDE. The photoelectro-Fenton-BDD (PEF-BDD) processes showed both the best color removal percentage (similar to 93%) and 91% of mineralization. The 3% NFMnO2/C GDE is promising for RB5 degradation. (C) 2018 Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 16/00819-8 - Síntese Controlada de Nanomateriais baseados em Pd e Pt: Otimizando Atividade e Estabilidade Eletrocatalítica |
| Beneficiário: | Luanna Silveira Parreira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 15/10314-8 - Nanoestruturas para a Degradação de Fenol, Ciprofloxacino e 17 alfa etinilestradiol |
| Beneficiário: | Mauro Coelho dos Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/21846-6 - Nanoestruturas para a remediação ambiental e produção de energia a partir de fontes renováveis |
| Beneficiário: | Mauro Coelho dos Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Regular |