Bioaugmentation with Acidithiobacillus species accelerates mineral weathering and formation of secondary mineral cements for hardpan development in sulfidic Pb-Zn tailings

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dc.contributor.authorLiu, Yen_AU
dc.contributor.authorWu, Sen_AU
dc.contributor.authorSoutham, Gen_AU
dc.contributor.authorChan, TSen_AU
dc.contributor.authorLu, YRen_AU
dc.contributor.authorPaterson, DJen_AU
dc.contributor.authorHuang, Len_AU
dc.date.accessioned2024-10-04T00:43:04Zen_AU
dc.date.available2024-10-04T00:43:04Zen_AU
dc.date.issued2021-06en_AU
dc.date.statistics2024-09-18en_AU
dc.description.abstractThe development of hardpan caps has great potential in rehabilitating sulfidic and metallic tailings, which may be accelerated by using exogenous Acidithiobacillus species. The present study aims to establish a bioaugmentation process with exogenous Acidithiobacillus species for accelerating the weathering of sulfidic minerals and formation of secondary mineral gels as precursors for hardpan structure development in a microcosm experiment. Exogenous Acidithiobacillus thiooxidans (ATCC 19377) and A. ferrooxidans (DSM 14882) were inoculated in a sulfidic Pb-Zn tailing containing negligible indigenous Acidithiobacillus species for accelerating the weathering of pyrite and metal sulfides. Microspectroscopic analysis revealed that the weathering of pyrite and biotite-like minerals was rapidly accelerated by exogenous Acidithiobacillus species, leading to the formation of secondary jarosite-like mineral gels and cemented profile in the tailings. Meanwhile, approximately 28% Zn liberated from Zn-rich minerals undergoing weathering was observed to be re-immobilized by Fe-rich secondary minerals such as jarosite-like mineral. Moreover, Pb-bearing minerals mostly remained undissolved, but approximately 30% Pb was immobilized by secondary Fe-rich minerals. The present findings revealed the critical role of exogenous Acidithiobacillus species in accelerating the precursory process of mineral weathering and secondary mineral formation for hardpan structure development in sulfidic Pb-Zn tailings. © 2020 Elsevier B.V.en_AU
dc.description.sponsorshipThis research was undertaken on the XAS beamline 01C1 at National Synchrotron Radiation Research Centre, Taiwan and XFM beamline at the Australian Synchrotron (AS182/XFM/13331), part of ANSTO. The authors also acknowledge the facilities, and the scientific and technical assistance, of the Australian Microscopy & Microanalysis Research Facility at the Centre for Microscopy and Microanalysis, The University of Queensland (UQ). The study was supported by UQ research higher degree grant (9342909-01-205-21).en_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.articlenumber124988en_AU
dc.identifier.citationLiu, Y., Wu, S., Southam, G., Chan, T.-S., Lu, Y.-R., Paterson, D. J., & Huang, L. (2021). Bioaugmentation with Acidithiobacillus species accelerates mineral weathering and formation of secondary mineral cements for hardpan development in sulfidic Pb-Zn tailings. Journal of Hazardous Materials, 411, 124988. doi:10.1016/j.jhazmat.2020.124988en_AU
dc.identifier.issn0304-3894en_AU
dc.identifier.issn1873-3336en_AU
dc.identifier.journaltitleJournal of Hazardous Materialsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2020.124988en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15732en_AU
dc.identifier.volume411en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectZincen_AU
dc.subjectLeaden_AU
dc.subjectMineralsen_AU
dc.subjectWeatheringen_AU
dc.subjectIronen_AU
dc.subjectTailingsen_AU
dc.subjectHeavy metalsen_AU
dc.subjectPyrrhotiteen_AU
dc.titleBioaugmentation with Acidithiobacillus species accelerates mineral weathering and formation of secondary mineral cements for hardpan development in sulfidic Pb-Zn tailingsen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2020-12-27en_AU
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