Manganese and cobalt redox cycling in laterites; Biogeochemical and bioprocessing implications

Newsome, Laura; Solano-Arguedas, Agustín F.; Coker, Victoria S.; Boothman, Christopher; Lloyd, Jonathan R.

doi:10.1016/j.chemgeo.2019.119330

Cited by 27 publications

(19 citation statements)

References 69 publications

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“…In a study to establish whether fungi could be used for bioleaching of metals from mine tailings, Ilyas et al (2013) [126] observed that 60% Co was solubilised after 24 d at pH (5-7.9). Similarly, Newsome et al (2020) [127] used the fungal community to recover Co from laterites and recorded that up to 64% Co could be recovered via microbial reduction of Mn(IV)-to Mn(II)-oxides, releasing Co(III) from the crystal structure.…”

Section: Microbiology Of Cobalt In Mine Wastesmentioning

confidence: 99%

“…Microbial interactions are widely regarded as exhibiting a central role in controlling Co environmental mobility [127]. Co mobilisation in mine waste rocks and minerals, tailings, soils, and stream sediment can occur via a number of processes such as redox processes, protonolysis, complexation by excreted metabolites and Fe(III)-binding siderophores, and indirect Fe(III) attack [138].…”

Section: Impact Of Microbial Activitymentioning

confidence: 99%

“…Microbial activity reduces Fe(III) and Mn(IV) to Fe(II) and Mn(II), respectively [139]. This results in an increase in solubility and consequently, release of the Co adsorbed to Fe(III) and Mn(IV) oxides [127,132,138,139]. Bacteria such as Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans, Sulfolobus spp., and Acidianus brierleyi can also oxidise Co-bearing sulphides [138,140].…”

Section: Impact Of Microbial Activitymentioning

confidence: 99%

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Geochemistry, Mineralogy and Microbiology of Cobalt in Mining-Affected Environments

2020

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Cobalt is recognised by the European Commission as a “Critical Raw Material” due to its irreplaceable functionality in many types of modern technology, combined with its current high-risk status associated with its supply. Despite such importance, there remain major knowledge gaps with regard to the geochemistry, mineralogy, and microbiology of cobalt-bearing environments, particularly those associated with ore deposits and subsequent mining operations. In such environments, high concentrations of Co (up to 34,400 mg/L in mine water, 14,165 mg/kg in tailings, 21,134 mg/kg in soils, and 18,434 mg/kg in stream sediments) have been documented. Co is contained in ore and mine waste in a wide variety of primary (e.g., cobaltite, carrolite, and erythrite) and secondary (e.g., erythrite, heterogenite) minerals. When exposed to low pH conditions, a number of such minerals are known to undergo dissolution, typically forming Co2+(aq). At circumneutral pH, such aqueous Co can then become immobilised by co-precipitation and/or sorption onto Fe and Mn(oxyhydr)oxides. This paper brings together contemporary knowledge on such Co cycling across different mining environments. Further research is required to gain a truly robust understanding of the Co-system in mining-affected environments. Key knowledge gaps include the mechanics and kinetics of secondary Co-bearing mineral environmental transformation, the extent at which such environmental cycling is facilitated by microbial activity, the nature of Co speciation across different Eh-pH conditions, and the environmental and human toxicity of Co.

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Section: Microbiology Of Cobalt In Mine Wastesmentioning

confidence: 99%

Section: Impact Of Microbial Activitymentioning

confidence: 99%

Section: Impact Of Microbial Activitymentioning

confidence: 99%

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Geochemistry, Mineralogy and Microbiology of Cobalt in Mining-Affected Environments

2020

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“…Investigation of the fate of Co during Mn(III,IV) oxide transformations is therefore required to develop a more complete understanding of Co biogeochemistry. Newsome et al (2020) showed that Co mobility in anaerobic laterite sediment microcosms was closely related to Mn release which was primarily attributed to indigenous Mn(IV) and Fe(III) reducing bacteria. This points to a direct relationship between Mn(III,IV) oxide mineral dissolution and Co mobility, and that anaerobic prokaryotes occupy an important role in such processes.…”

Section: Introductionmentioning

confidence: 99%

Fungal transformation of natural and synthetic cobalt‐bearing manganese oxides and implications for cobalt biogeochemistry

Ferrier

Csetényi

Gadd

2021

Environmental Microbiology

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Manganese oxide minerals can become enriched in a variety of metals through adsorption and redox processes, and this forms the basis for a close geochemical relationship between Mn oxide phases and Co. Since oxalate-producing fungi can effect geochemical transformation of Mn oxides, an understanding of the fate of Co during such processes could provide new insights on the geochemical behaviour of Co. In this work, the transformation of Mn oxides by Aspergillus niger was investigated using a Co-bearing manganiferous laterite, and a synthetic Co-doped birnessite. A. niger could transform laterite in both fragmented and powder forms, resulting in formation of biomineral crusts that were composed of Mn oxalates hosting Co, Ni and, in transformed laterite fragments, Mg. Total transformation of Co-doped birnessite resulted in precipitation of Co-bearing Mn oxalate. Fungal transformation of the Mn oxide phases included Mn(III,IV) reduction by oxalate, and may also have involved reduction of Co(III) to Co(II). These findings demonstrate that oxalate-producing fungi can influence Co speciation in Mn oxides, with implications for other hosted metals including Al and Fe. This work also provides further understanding of the roles of fungi as geoactive agents which can inform potential applications in metal bioremediation, recycling and biorecovery.

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“…Zinc refining operations, for instance, have been generating large amounts of iron oxide-rich jarosite and goethite wastes, posing serious environmental, social and economic difficulties 20 . Primary laterite ores are increasingly being investigated due to their abundance and significant quantities of important metals Co and Ni 21 . Over the last century, bioleaching is being increasingly investigated as a more sustainable mode of hydrometallurgical metal extraction 22 .…”

Section: Introductionmentioning

confidence: 99%

Selective metal extraction by biologically produced siderophores during bioleaching from low-grade primary and secondary mineral resources

Williamson

Folens

Matthijs³

et al. 2021

Preprint

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Siderophores are a class of biogenic macromolecules that have high affinities for metals in the environment, thus could be exploited for alternate sustainable metal recovery technologies. Here, we assess the role of siderophores in the extraction and complexation of metals from an iron oxide-rich metallurgical processing residue and a low-grade primary Ni ore. Evaluation of the biological siderophore bioproduction by three pseudomonads, P. fluorescens, P. azotoformans and P. putida identified that P. putida could generate the highest siderophore yield, which was characterized as a hydroxamate and catecholate mixed-type pyoverdine PyoPpC-3B. Key physiochemical parameters involved in raw siderophore mediated metal extraction were identified using a fractional factorial design of experiments (DOE) and subsequently employed in purified PyoPpC-3B leaching experiments. Further targeted experiments with hydroxamate and catecholate functional analogues of PyoPpC-3B confirmed their marked ability to competitively or selectively leach and chelate hard metal ions, including Al(OH)4-, Mn2+ and Zn2+. Interestingly, complexation of Mn and Zn ions exceeded the natural affinity of pyoverdine for Fe3+, thus despite the low metal recoveries from the materials tested in this study, this work provides important new insights in siderophore-metal interactions.

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Manganese and cobalt redox cycling in laterites; Biogeochemical and bioprocessing implications

Cited by 27 publications

References 69 publications

Geochemistry, Mineralogy and Microbiology of Cobalt in Mining-Affected Environments

Geochemistry, Mineralogy and Microbiology of Cobalt in Mining-Affected Environments

Fungal transformation of natural and synthetic cobalt‐bearing manganese oxides and implications for cobalt biogeochemistry

Selective metal extraction by biologically produced siderophores during bioleaching from low-grade primary and secondary mineral resources

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