Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance

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dc.contributor.authorJones, Gavin
dc.contributor.authorvan Hille, Robert P
dc.contributor.authorHarrison, Susan T L
dc.date.accessioned2016-08-19T12:18:16Z
dc.date.available2016-08-19T12:18:16Z
dc.date.issued2009
dc.date.updated2016-08-17T12:40:10Z
dc.description.abstractIn tank bioleaching, decreasing particle size of milled concentrates has been shown to improve leaching performance owing to increased mineral surface area and mechanical activation effects of fine mineral particles. However, evidence suggests a critical lower limit of particle size distribution exists below which the performance of the thermophilic iron and sulfur oxidizer Sulfolobus metallicus is compromised and complete culture death may result. This paper proposes an explanation for these observations at fine fractions through identifying a relationship between mineral composition of six sulfide concentrates, their extent of milling and the generation of the reactive oxygen species (ROS) hydrogen peroxide (H2O2) and hydroxyl radicals (•OH) in slurries. The effect of oxidative stress induced in the absence of minerals on growth and bioleaching performance of S. metallicus is studied.en_ZA
dc.identifier.apacitationJones, G., van Hille, R. P., & Harrison, S. T. L. (2009). Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance. <i>Advanced Materials Research</i>, http://hdl.handle.net/11427/21370en_ZA
dc.identifier.chicagocitationJones, Gavin, Robert P van Hille, and Susan T L Harrison "Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance." <i>Advanced Materials Research</i> (2009) http://hdl.handle.net/11427/21370en_ZA
dc.identifier.citationJones, G., van Hille, R. P., & Harrison, S. T. (2009). Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance. In Advanced Materials Research (Vol. 71, pp. 365-368). Trans Tech Publications.en_ZA
dc.identifier.issn1022-6680en_ZA
dc.identifier.ris TY - Journal Article AU - Jones, Gavin AU - van Hille, Robert P AU - Harrison, Susan T L AB - In tank bioleaching, decreasing particle size of milled concentrates has been shown to improve leaching performance owing to increased mineral surface area and mechanical activation effects of fine mineral particles. However, evidence suggests a critical lower limit of particle size distribution exists below which the performance of the thermophilic iron and sulfur oxidizer Sulfolobus metallicus is compromised and complete culture death may result. This paper proposes an explanation for these observations at fine fractions through identifying a relationship between mineral composition of six sulfide concentrates, their extent of milling and the generation of the reactive oxygen species (ROS) hydrogen peroxide (H2O2) and hydroxyl radicals (•OH) in slurries. The effect of oxidative stress induced in the absence of minerals on growth and bioleaching performance of S. metallicus is studied. DA - 2009 DB - OpenUCT DP - University of Cape Town J1 - Advanced Materials Research LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 SM - 1022-6680 T1 - Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance TI - Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance UR - http://hdl.handle.net/11427/21370 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21370
dc.identifier.vancouvercitationJones G, van Hille RP, Harrison STL. Sulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performance. Advanced Materials Research. 2009; http://hdl.handle.net/11427/21370.en_ZA
dc.languageengen_ZA
dc.publisherTrans Tech Publicationsen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceAdvanced Materials Researchen_ZA
dc.source.urihttp://www.scientific.net/
dc.subject.otherOxidative Stress
dc.subject.otherReactive Oxygen Species
dc.subject.otherSulfide Concentrate
dc.subject.otherSulfolobus Metallicus
dc.titleSulfide mineral induced oxidative stress as a limiting factor in tank bioleaching performanceen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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