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Effect of surfactant OPD on the bioleaching of marmatite / Zhuoyue Lan in Minerals engineering, Vol. 22 N° 1 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 10–13 Titre : Effect of surfactant OPD on the bioleaching of marmatite Type de document : texte imprimé Auteurs : Zhuoyue Lan, Auteur ; Yuehua Hu, Auteur ; Wenqing Qin, Auteur Année de publication : 2009 Article en page(s) : pp. 10–13 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Bioleaching  Bacteria  Sulphide  ore  Reaction  kinetics  Hydrometallurgy Index. décimale : 622 Industrie minière Résumé : The effect of surfactant o-phenylenediamine (OPD) on the bioleaching of marmatite with mixed cultures of Acidithiobacillusferrooxidans, Acidithiobacillusthiooxidans and Leptospirillumferrooxidans was examined in shaking flasks. The effect of OPD on the iron and sulfur oxidizing capacity of the bacteria was also investigated. Results show that the addition of OPD in low concentration was favorable for the bio-oxidation of elemental sulfur and had little negative effect on that of iron. Chemical analysis and EDX analysis of the leached residues reveal that zinc was selectively leached over iron. The elemental sulfur produced from the leaching reaction was not completely oxidized and dissolved only partially even in the presence of bacteria, which limited the dissolution rate of marmatite. However, the addition of OPD accelerated the oxidation of elemental sulfur in the presence of bacteria, thus enhancing the bioleaching rate of marmatite. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000502 [article] Effect of surfactant OPD on the bioleaching of marmatite [texte imprimé] / Zhuoyue Lan, Auteur ; Yuehua Hu, Auteur ; Wenqing Qin, Auteur . - 2009 . - pp. 10–13. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 10–13 Mots-clés : Bioleaching  Bacteria  Sulphide  ore  Reaction  kinetics  Hydrometallurgy Index. décimale : 622 Industrie minière Résumé : The effect of surfactant o-phenylenediamine (OPD) on the bioleaching of marmatite with mixed cultures of Acidithiobacillusferrooxidans, Acidithiobacillusthiooxidans and Leptospirillumferrooxidans was examined in shaking flasks. The effect of OPD on the iron and sulfur oxidizing capacity of the bacteria was also investigated. Results show that the addition of OPD in low concentration was favorable for the bio-oxidation of elemental sulfur and had little negative effect on that of iron. Chemical analysis and EDX analysis of the leached residues reveal that zinc was selectively leached over iron. The elemental sulfur produced from the leaching reaction was not completely oxidized and dissolved only partially even in the presence of bacteria, which limited the dissolution rate of marmatite. However, the addition of OPD accelerated the oxidation of elemental sulfur in the presence of bacteria, thus enhancing the bioleaching rate of marmatite. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000502