| Titre : |
Degradation of azo dye by the fluidised-bed Fenton process |
| Type de document : |
texte imprimé |
| Auteurs : |
Massakul Pukdee-Asa, Auteur ; Chia-Chi Su, Auteur ; Chavalit Ratanatamskul, Auteur ; Ming-Chun Lu, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 28-35 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorants -- Détérioration
Colorants azoïques
Fenton, Réaction de
Fluidisation
|
| Index. décimale : |
667.6 Peintures |
| Résumé : |
A fluidised-bed Fenton process was utilised for the homogeneous and heterogeneous Fenton degradation of three azo dyes: CI Reactive Black 5, CI Reactive Orange 16 and CI Reactive Blue 2. The effects of the concentration of Fe2+ and hydrogen peroxide on the decolorisation and degradation of the azo dyes were examined. More than 96% of colour removal of the azo dyes was achieved using the fluidised-bed Fenton process. Chemical oxygen demand (COD) removal of the three azo dyes followed pseudo-second-order kinetics at various Fe2+ and hydrogen peroxide concentrations. COD removal of the three azo dyes increased with increasing Fe2+ concentration and was more than 85%. In addition, the COD removal efficiency of the three types of azo dyes first increased and then decreased as the hydrogen peroxide concentration increased. Presumably, the scavenging effect of hydrogen peroxide on hydroxyl radicals occurs at high concentrations of hydrogen peroxide. The most efficient COD removal was found at 160–220 mg/l hydrogen peroxide. More than 80% of the COD was eliminated at pH 3 in 20 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Black 5, 25 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Orange 16 and 20 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Blue 2. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Methods and reactor
- RESULTS AND DISCUSSION : Effect of different carriers on the removal of azo dyes - Effect of Fe2+ and hydrogen peroxide concentrations - Comparison of COD removal efficiency |
| DOI : |
10.1111/j.1478-4408.2011.00325.x |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00325.x/pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13094 |
in COLORATION TECHNOLOGY > Vol. 128, N° 1 (2012) . - p. 28-35
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