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Synthesis and characterization of acicular iron oxide particles obtained from acid mine drainage and their catalytic properties in toluene oxidation / Silvia L. F. Andersen in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 767-774 Titre : Synthesis and characterization of acicular iron oxide particles obtained from acid mine drainage and their catalytic properties in toluene oxidation Type de document : texte imprimé Auteurs : Silvia L. F. Andersen, Auteur ; Rubia G. Flores, Auteur ; Vivian S. Madeira, Auteur Année de publication : 2012 Article en page(s) : pp. 767-774 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : 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 [article] Synthesis and characterization of acicular iron oxide particles obtained from acid mine drainage and their catalytic properties in toluene oxidation [texte imprimé] / Silvia L. F. Andersen, Auteur ; Rubia G. Flores, Auteur ; Vivian S. Madeira, Auteur . - 2012 . - pp. 767-774. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 767-774 Mots-clés : 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