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Azo-dye Orange II degradation by heterogeneous Fenton-like reaction using carbon-Fe catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ramirez, Jorge H. Maldonado-Hódar, Francisco J. Pérez-Cadenas, Agustín F. Moreno-Castilla, Carlos Costa, Carlos Augusto Alves Madeira, Luís M. |
| Copyright Year | 2007 |
| Abstract | Abstract In this work, the degradation and mineralization of the non-biodegradable azo dye Orange II (OII) was studied, making use of a heterogeneous Fenton-like oxidation process. For that, hydrogen peroxide activation was achieved by means of two different carbon-based catalysts, which have been impregnated with 7 wt% of iron. The carbon supports employed are quite different, one of them being an activated carbon prepared from agricultural by-products (olive stone), while the other one is a carbon aerogel, prepared by carbonization of an organic resorcinol–formaldehyde polymer. The solids have been characterized using several techniques, namely N 2 and CO 2 adsorption at −196 and 0 °C, respectively, mercury porosimetry, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). Then, the catalyst's performance in the Fenton-like oxidation of OII was compared, and the effects of the most relevant operating conditions (pH, catalyst concentration, H 2 O 2 concentration and temperature) analyzed for the most promising one (the carbon aerogel based catalyst). In this catalyst, characterization data point for a very good iron dispersion on the carbon surface. This sample showed very good catalytic performances, with mineralization degrees as high as 90%. However, iron leaching from the support is also considerable leading to a progressive deactivation in consecutive reaction cycles. |
| Starting Page | 312 |
| Ending Page | 323 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.apcatb.2007.05.003 |
| Volume Number | 75 |
| Alternate Webpage(s) | https://paginas.fe.up.pt/~lepabe/publicacoes_restritas/papers/lmm/Appl%20Catal%20B,%2075,%202007,%20312.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.apcatb.2007.05.003 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
