Reductive dissolution of ferric iron minerals: A new approach for bio-processing nickel laterites

Hallberg, Kevin B.; Grail, Barry M.; Plessis, Chris A. du; Johnson, D. Barrie

doi:10.1016/j.mineng.2010.09.005

Cited by 134 publications

(89 citation statements)

References 13 publications

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“…Reductive bio-processing of limonitic laterite involves two stages (Hallberg et al, 2011): (i) with continued aeration (Hallberg et al, 2011). Biologically produced intermediate species of oxidised sulphur can act as reducing agents for Fe and Mn oxides (Kumari and Natarajan, 2001), as demonstrated by the reactions listed in Table 4.…”

Section: Reducing Agents: Advantages and Problemsmentioning

confidence: 99%

“…These include citric, oxalic, malic and lactic acid which are fungi metabolites, and glycerol which is a by-product of bio-diesel industry. These reagents provide a weak acid medium as well as reducing and/or chelating anions for metal oxides/ions (Tang and Valix, 2006;Simate et al, 2010;Hallberg et al, 2011).…”

Section: Reducing Agents: Advantages and Problemsmentioning

confidence: 99%

“…Economic evaluation of different commercial, piloted, or bench scale alternative processing routes, depending upon the location and mineralogy of ore, and availability of technology has also been conducted. These include smelting, reduction roasting to ferronickel and ammonia leaching (Caron process), high pressure acid leaching, strong brine leaching, atmospheric leaching, heap leaching and microbial leaching with fungi or bacteria (Kyle, 1996;Whittington and Muir, 2000;Curlook, 2004;Muir and Johnson, 2006;McDonald and Whittington, 2008a,b;Xavier and Ciminelli, 2008;Steyl et al, 2008;Simate et al, 2010;Hallberg et al, 2011;Norgate and Jahanshahi, 2011). The recovery of a mixed sulphide or hydroxide precipitate (MSP or MHP) of Ni(II) and Co(II) from leach liquors of a widened ore type and grade, which can be sold to existing refineries, is the preferred option when metal production on the minesite is not intended (Curlook, 2004;White et al, 2006;Steyl et al, 2008;Kose and Topkaya, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Reductive acid leaching of laterite and metal oxides — A review with new data for Fe(Ni,Co)OOH and a limonitic ore

et al. 2011

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The reductive leaching of nickel laterite has attracted the interest of many researchers due to the enhanced kinetics of nickel and cobalt dissolution in the presence of acids and reducing agents during atmospheric, pressure, heap or bio leaching processes. Systematic studies on synthetic oxides and natural ores can shed light on the reaction mechanism and lead to investigations of beneficial reagents for further studies. This paper briefly reviews the literature and describes a comparative study of metal leaching from synthetic goethite spiked with nickel or cobalt and a limonitic laterite ore to rationalise the role of reducing agents in acid media. Results are discussed on the basis of the effect of speciation, surface chemical reactivity of oxides and heterogeneous kinetic models.Key words: Laterite, synthetic oxides, reductive leaching, kinetics, adsorption. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Section: Reducing Agents: Advantages and Problemsmentioning

confidence: 99%

Section: Reducing Agents: Advantages and Problemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reductive acid leaching of laterite and metal oxides — A review with new data for Fe(Ni,Co)OOH and a limonitic ore

et al. 2011

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“…Ferric iron produced in this process serves as a strong oxidation agent able to oxidise present metals [1]. However, iron can be also used as a good electron acceptor in anaerobic respiration chains of bacteria resulting in production of Fe 2+ ions which serve as reducing agents for metals which dissolve in their reduced forms [28,29].…”

Section: The Importance Of Iron In Waste Bioleachingmentioning

confidence: 99%

Closing the Loop: Key Role of Iron in Metal-Bearing Waste Recycling

Sedláková-Kaduková

Marcinčáková

Mražíková

et al. 2017

Archives of Metallurgy and Materials

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The role of iron in metal-bearing waste bioleaching was studied. Four various types of waste (printed circuit boards (PCBs), Ni-Cd batteries, alkaline batteries and Li-ion batteries) were treated by bioleaching using the acidophilic bacteria A. ferrooxidans and A. thiooxidans (separately or in mixture). Role of main leaching agents (Fe 3+ ions or sulphuric acid) was simulated in abiotic experiments. Results showed that oxidation abilities of Fe 3+ ions were crucial for recovery of Cu and Zn from PCBs, with the efficiencies of 88% and 100%, respectively. To recover 68% of Ni from PCBs, and 55% and 100% of Ni and Cd, respectively, from Ni-Cd batteries both oxidation action and hydrolysis of Fe 3+ were required. The importance of Fe 2+ ions as a reducing agent was showed in bioleaching of Co from Li-ion batteries and Mn from alkaline batteries. The efficiency of the processes has increased by 70% and 40% in Co and Mn bioleaching, respectively, in the presence of Fe 2+ ions. Based on the results we suggest the integrated biometallurgical model of metal-bearing waste recycling in the effort to develop zero-waste and less energy-dependent technologies.

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“…At. ferrooxidans growing on sulfur under aerobic conditions could, in the same reactor operated anaerobically, couple sulfur oxidation with iron(III) reduction and accelerate the dissolution of goethite in mildly acidic medium [116]. In addition, heterotrophic acidophiles unable to oxidise iron(II), may nevertheless reduce iron(III) by coupling the reaction with the utilisation of organic compounds.…”

Section: Risc Biooxidation In Anoxic or Oxygen-limited Environmentsmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

140

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This review has as its underlying premise the need to become proficient in delivering a suite of element or metal products from polymetallic ores to avoid the predicted exhaustion of key metals in demand in technological societies. Many technologies, proven or still to be developed, will assist in meeting the demands of the next generation for trace and rare metals, potentially including the broader application of biohydrometallurgy for the extraction of multiple metals from low-grade and complex ores. Developed biotechnologies that could be applied are briefly reviewed and some of the difficulties to be overcome highlighted. Examples of the bioleaching of polymetallic mineral resources using different combinations of those technologies are described for polymetallic sulfide concentrates, low-grade sulfide and oxidised ores. Three areas for further research are: (i) the development of sophisticated continuous vat bioreactors with additional controls; (ii) in situ and in stope bioleaching and the need to solve problems associated with microbial activity in that scenario; and (iii) the exploitation of sulfur-oxidising microorganisms that, under specific anaerobic leaching conditions, reduce and solubilise refractory iron(III) or manganese(IV) compounds containing multiple elements. Finally, with the successful applications of stirred tank bioleaching to a polymetallic tailings dump and heap bioleaching to a polymetallic black schist ore, there is no reason why those proven technologies should not be more widely applied.

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Reductive dissolution of ferric iron minerals: A new approach for bio-processing nickel laterites

Cited by 134 publications

References 13 publications

Reductive acid leaching of laterite and metal oxides — A review with new data for Fe(Ni,Co)OOH and a limonitic ore

Reductive acid leaching of laterite and metal oxides — A review with new data for Fe(Ni,Co)OOH and a limonitic ore

Closing the Loop: Key Role of Iron in Metal-Bearing Waste Recycling

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

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