| Full text | |
| Author(s): |
Aveiro, L. R.
[1, 2]
;
da Silva, A. G. M.
[3]
;
Candido, E. G.
[3]
;
Paz, E. C.
[1]
;
Pinheiro, V. S.
[1]
;
Parreira, L. S.
[3]
;
Souza, F. M.
[1]
;
Antonin, V. S.
[1]
;
Camargo, P. H. C.
[3]
;
dos Santos, M. C.
[1]
Total Authors: 10
|
| Affiliation: | [1] Fed Univ ABC, Ctr Nat & Human Sci, Lab Electrochem & Nanostruct Mat, St Andre - Brazil
[2] Fed Inst Educ Sci & Technol Sao Paulo, IFSP, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Inst Chem, Av Prof Lineu Prestes 748, Sao Paulo, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | ELECTROCATALYSIS; v. 11, n. 3 JAN 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Treatments of simulated effluent solutions containing the Reactive Black 5 (RB5) were carried out by electrochemical, photoelectrochemical, electro-Fenton and photoelectro-Fenton methods using a one-compartment cell with a boron-doped diamond anode and a 3% of manganese dioxide nanoflowers supported on a carbon Vulcan XC72 gas diffusion electrode cathode. In the photo-assisted processes, the solution was irradiated using a 40-W UVC lamp immersed in the treated solution. For Fenton-based processes, only 5 min was required to attain 95% (photoelectro-Fenton) and 93% (electro-Fenton) RB5 dye degradation. When conversion to CO2 is taken into account after 6-h treatment, electrochemical method mineralized 13% of the organic load whereas removals greater than 90% were attained using the Fenton-based processes. These completely different results can be explained by the distinct spatial availability of the generated hydroxyl radical: only near the anode surface as in electrochemical-based processes or added to those distributed across the solution bulk as in Fenton-based processes. Graphical (a) Percentage of colour removal at lambda = 596 nm and (b) Removal of TOC % vs electrolysis time. Methods: (black square) EF-BDD (1), (red circle) EFPA-BDD, (blue up-pointing triangle) AO-BDD, (white square) EF-BDD (2) and (white circle) EF-BDD (3). In the EFPA-BDD systems, the solution was irradiated with a 46-W UVC lamp at lambda = 254 nm. (AU) | |
| FAPESP's process: | 16/00819-8 - Controlled Synthesis of Nanomaterials based on Pd and Pt: Electrocatalytic Activity and Stability |
| Grantee: | Luanna Silveira Parreira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/26288-1 - Hybrid electrocatalysts based on Pd, Pt and Sn nanoparticles, and on ceria nanorods for application in fuel cells |
| Grantee: | Victor dos Santos Pinheiro |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation |
| Grantee: | Mauro Coelho dos Santos |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/22976-0 - Development of palladium and niobium nanoelectrocatalysts for alkaline direct ethanol fuel cells |
| Grantee: | Felipe de Moura Souza |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination |
| Grantee: | Marcos Roberto de Vasconcelos Lanza |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 17/21846-6 - Nanostructures for environmental remediation and power generation from renewable sources |
| Grantee: | Mauro Coelho dos Santos |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Regular Program Grants |