Reductive Acid Leaching of Low Grade Manganese Ores

Das, Alok Prasad; Swain, Sarpras; Panda, Shriyanka; Pradhan, Nilotpala; Sukla, Lala Behari

doi:10.4236/gm.2012.24011

Cited by 75 publications

(12 citation statements)

References 14 publications

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“…The numerous microbe-mineral interactions act as a link to understand the innate mechanisms of certain phenomena taking place in nature and assist to study the mineral surfaces and changes occurring in minerals with respect to time and action of microbial species (Mapelli et al 2012). Over the past few years, the interactions of selected microorganisms for beneficiation and bioleaching of the low-grade minerals/mineral wastes have been reported (Baba et al 2011;Erust et al 2013;Esther et al 2013;Panda et al 2012aPanda et al , b, 2013aPanda et al , 2015 and gradually gaining lot of importance for providing eco-friendly methods of environmental reclamation.…”

Section: Introductionmentioning

confidence: 99%

Environmental Microbial Biotechnology

Sukla¹,

Pradhan²,

Panda³

et al. 2015

Soil Biology

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Section: Introductionmentioning

confidence: 99%

Environmental Microbial Biotechnology

Sukla¹,

Pradhan²,

Panda³

et al. 2015

Soil Biology

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“…In contrast, using laterite ores from Western Australia and Indonesia, McKenzie et al [346] reported that citric, tartaric and pyruvic acids increased the yield of soluble nickel for limonite type ores. In a comparative study, Das et al [347] showed that oxalic acid was more efficient at extracting manganese (66%) than citric acid (40%) from low-grade ferromanganese ore, attributing the difference to the reducing capacity of oxalic acid and its affinity for manganese complexation.…”

Section: Leaching With Acidophilic Heterotrophs/organic Acidmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

137

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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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“…In this case, cell adhesion to the mineral surface is an absolute essential prerequisite. The indirect mechanism is mainly based on the production of metabolites like organic acid which in turn causes metal solubilization Das, Swain, Panda, Pradhan, & Sukla, 2012;Ghosh, Mohanty, Akcil, Sukla, & Das, 2016).…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of manganese from mining waste residues using Acinetobacter sp.

Ghosh

Das

2017

Geology, Ecology, and Landscapes

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The rapid decrease of natural resources and generation of huge amount of metallic wastes from mining industries has led to the focus of researchers to shift to alternative methods of waste benefaction and resource recycling. This study aims at the development of an eco friendly technique to recover Manganese (Mn) from mining waste residues using Acinetobacter sp. Bioleaching experiments were conducted in shake flasks at initial pH 6.5, 5% w/v inoculums and 2% pulp density at 30 °C with agitation speed 200 RPM and Acinetobacter sp. as inoculum. Mn recovery of 76% was recorded in 20 days. The analysis of the changes in cellular protein expression and conformation was carried out through sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS PAGE) and fourier transform infrared spectroscopy. The results reveal that bioleaching can alter protein expression and also result in conformational changes in protein structure. The present study sheds light on the greener alternative to recover and recycle manganese from wastes native bacteria. Exciting prospects for the utilization of mining wastes are in store in the near future; providing an economic and ecologically sound alternative to pyrometallurgical processes.

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Reductive Acid Leaching of Low Grade Manganese Ores

Cited by 75 publications

References 14 publications

Environmental Microbial Biotechnology

Environmental Microbial Biotechnology

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Bioleaching of manganese from mining waste residues using Acinetobacter sp.

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