Arsenopyrite Dissolution and Bioscorodite Precipitation by Acidithiobacillus ferrivorans ACH under Mesophilic Condition

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dc.contributor.authorBarahona, S.
dc.contributor.authorHerrera, E.
dc.contributor.authorJara, A.
dc.contributor.authorCastro-Severyn, J.
dc.contributor.authorGallardo, K.
dc.contributor.authorFuentes, G.
dc.contributor.authorDorador, C.
dc.contributor.authorSaavedra, C.
dc.contributor.authorRemonsellez, F.
dc.date.accessioned2022-05-10T19:55:46Z
dc.date.available2022-05-10T19:55:46Z
dc.date.issued2022-04
dc.descriptionIndexación: Scopus.es
dc.description.abstractArsenopyrite is the most abundant arsenic-bearing sulfide mineral in the lithosphere, usually associated with sulfide gold ores. The recovery of this highly valuable metal is associated with the release of large quantities of soluble arsenic. One way to mitigate the effects of high concentrations of arsenic in solution is to immobilize it as scorodite precipitate, a more stable form. Hence, we addressed the scorodite formation capacity (under mesophilic conditions) of psychrotolerant Acidithiobacillus ferrivorans ACH isolated from the Chilean Altiplano. Bio-oxidation assays were performed with 1% arsenopyrite concentrate as unique energy source and produced solids were evaluated by X-ray diffraction (XRD) and QEMSCAN analysis. Interestingly, the results evidenced scorodite generation as the main sub-product after incubation for 15 days, due to the presence of the microorganism. Moreover, the QEMSCAN analysis support the XRD, detecting a 3.5% increase in scorodite generation by ACH strain and a 18.7% decrease in arsenopyrite matrix, implying an active oxidation. Finally, we presented the first record of arsenopyrite oxidation capacity and the stable scorodite production ability by a member of A. ferrivorans species under mesophilic conditions.es
dc.description.urihttps://www.mdpi.com/2075-163X/12/5/520
dc.identifier.citationMinerals, Volume 12, Issue 5, May 2022, Article number 520es
dc.identifier.doi10.3390/min12050520
dc.identifier.issn2075-163X
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/22489
dc.language.isoenes
dc.publisherMDPIes
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://www.mdpi.com/openaccess
dc.subjectAcidithiobacillus ferrivoranses
dc.subjectarsenopyritees
dc.subjectbio-oxidationes
dc.subjectbioscoroditees
dc.subjectprecipitationes
dc.subjectCopperes
dc.subjectChalcopyritees
dc.subjectAcidithiobacillus Ferrooxidanses
dc.titleArsenopyrite Dissolution and Bioscorodite Precipitation by Acidithiobacillus ferrivorans ACH under Mesophilic Conditiones
dc.typeArtículoes
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