Some aspects of pH effects and acid stress in heap bioleaching

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dc.contributor.authorTupikana, O V
dc.contributor.authorNgoma, I E
dc.contributor.authorMinnaar, S
dc.contributor.authorHarrison, S T L
dc.date.accessioned2016-08-19T12:09:53Z
dc.date.available2016-08-19T12:09:53Z
dc.date.issued2011
dc.date.updated2016-08-17T11:28:04Z
dc.description.abstractThe chemical and physical conditions in sulphide heaps provide a complex environment for micro-organisms, with differences in redox potential, acidity, temperature, oxygen and solution chemistry conditions being experienced both temporally and spatially. One of the most important parameters for successful microbial colonisation and active microbial metabolism is suitable pH conditions in the heap. Typically heaps reach tens of metres high and the pH of irrigation solution travelling through heap changes significantly. In this study, we investigated the effect of pH and acid stress for moderately thermophilic and thermophilic mixed cultures, operating at 50–60 C in a heap bioleaching environment. Results collected from laboratory scale column reactors packed with the low grade whole ore and irrigated with different pH solutions during a temperature shift from moderately thermophilic conditions to thermophilic conditions are discussed.en_ZA
dc.identifierhttp://dx.doi.org/10.1016/j.mineng.2011.06.001
dc.identifier.apacitationTupikana, O. V., Ngoma, I. E., Minnaar, S., & Harrison, S. T. L. (2011). Some aspects of pH effects and acid stress in heap bioleaching. <i>Minerals Engineering</i>, http://hdl.handle.net/11427/21368en_ZA
dc.identifier.chicagocitationTupikana, O V, I E Ngoma, S Minnaar, and S T L Harrison "Some aspects of pH effects and acid stress in heap bioleaching." <i>Minerals Engineering</i> (2011) http://hdl.handle.net/11427/21368en_ZA
dc.identifier.citationTupikina, O. V., Ngoma, I. E., Minnaar, S., & Harrison, S. T. L. (2011). Some aspects of the effect of pH and acid stress in heap bioleaching. Minerals Engineering, 24(11), 1209-1214.en_ZA
dc.identifier.issn0892-6875en_ZA
dc.identifier.ris TY - Journal Article AU - Tupikana, O V AU - Ngoma, I E AU - Minnaar, S AU - Harrison, S T L AB - The chemical and physical conditions in sulphide heaps provide a complex environment for micro-organisms, with differences in redox potential, acidity, temperature, oxygen and solution chemistry conditions being experienced both temporally and spatially. One of the most important parameters for successful microbial colonisation and active microbial metabolism is suitable pH conditions in the heap. Typically heaps reach tens of metres high and the pH of irrigation solution travelling through heap changes significantly. In this study, we investigated the effect of pH and acid stress for moderately thermophilic and thermophilic mixed cultures, operating at 50–60 C in a heap bioleaching environment. Results collected from laboratory scale column reactors packed with the low grade whole ore and irrigated with different pH solutions during a temperature shift from moderately thermophilic conditions to thermophilic conditions are discussed. DA - 2011 DB - OpenUCT DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 SM - 0892-6875 T1 - Some aspects of pH effects and acid stress in heap bioleaching TI - Some aspects of pH effects and acid stress in heap bioleaching UR - http://hdl.handle.net/11427/21368 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21368
dc.identifier.vancouvercitationTupikana OV, Ngoma IE, Minnaar S, Harrison STL. Some aspects of pH effects and acid stress in heap bioleaching. Minerals Engineering. 2011; http://hdl.handle.net/11427/21368.en_ZA
dc.languageengen_ZA
dc.publisherElsevieren_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en_ZA
dc.sourceMinerals Engineeringen_ZA
dc.source.urihttp://www.sciencedirect.com/science/journal/08926875
dc.subject.otherCopper bioleaching
dc.subject.otherHeap bioleaching pH
dc.subject.otherAcidophilic chemolithotrophic microorganisms
dc.titleSome aspects of pH effects and acid stress in heap bioleachingen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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