| Titre : | Synthesis and characterization of acicular iron oxide particles obtained from acid mine drainage and their catalytic properties in toluene oxidation (2012) |
| Auteurs : | Silvia L. F. Andersen, Auteur ; Rubia G. Flores, Auteur ; Vivian S. Madeira, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 2, Janvier 2012) |
| Article en page(s) : | pp. 767-774 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Oxidation Catalytic reaction Acid mine drainage |
| Résumé : | Acid mine drainage (AMD) has long been a significant environmental problem resulting from the microbial oxidation of iron pyrite in the presence of water and air. This Article describe a method to produce acicular goethite particles (AGNs) from AMD and their application as a catalyst for the combustion of volatile organic compounds. Ferric ions were recovered from AMD as AGNs with relatively high purity via an oxidation-selective precipitation process during AMD treatment. Hematite materials (PNs) were produced when the AGNs were treated at 450 °C. These materials were characterized by XRD, SEM, TGA, and N2 adsorption/desorption. The PNs were tested as a combustion catalyst and shown to be useful for the oxidation of toluene. AGNs impregnated with manganese were used to prepare the PN_Mn5 catalyst. The catalysts selectively produced CO2 and water, representing a good alternative to commercially available catalysts in terms of origin and availability. |
| DEWEY : | 660 |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=25476410 |
