Effect of anions on selective solubilization of zinc and copper in bacterial leaching of sulfide ores

Harahuc, Lesia; Lizama, Hector M.; Suzuki, Isamu

doi:10.1002/(sici)1097-0290(20000720)69:2<196::aid-bit8>3.0.co;2-q

Cited by 11 publications

(5 citation statements)

References 33 publications

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“…Studies using At. ferrooxidans as the test species showed that nitrate was more inhibitory to iron(II) oxidation than to RISC oxidation [89,90]. However, in a recent comparison of the effects of nitrate ion on substrate utilisation by bacteria and archaea, it was found that the bacteria adapted to the presence of nitrate in growth media and resumed iron(II)-oxidation within a nine-week period in bioleaching tests [91].…”

Section: Anionsmentioning

confidence: 99%

Microbiological Advances in Biohydrometallurgy

Watling

2016

Minerals

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The most exciting advances in biohydrometallurgy are occurring in the field of microbiology. The two main technologies employed in biohydrometallurgy, agitated tanks for the processing of refractory concentrates and heaps and dumps for the processing of low-grade ores, are technologically sound and widely practised at commercial scale, but their development began at a time when very little was known of the microorganisms that assisted metals extraction from sulfide ores. During and subsequent to those developments it has been shown that microbial communities in metals extraction are more diverse than originally thought, and extremely robust and adaptable to different and variable environments. Recent advances in genomics and proteomics, exploiting hugely increased computing power and speed, have made it possible to describe not only which microorganisms are present in bioleaching systems, but also what physiological functions are being exercised. The body of knowledge being acquired through the application of molecular biology methods will be used increasingly to monitor microbial behaviour, optimise conditions for more appropriate microbiological activity and/or infer the "microbiological health" of bioreactors (tanks and heaps).

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Section: Anionsmentioning

confidence: 99%

Microbiological Advances in Biohydrometallurgy

Watling

2016

Minerals

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“…Nitrate was more inhibitory to iron(II) oxidation than sulfur oxidation by At. ferrooxidans [143,144]. However, a recent comparison of the effects of nitrate on substrate utilisation by bacteria and archaea capable of both iron(II)-and sulfur-oxidation showed that mesophilic and moderately thermophilic bacteria adapted to the presence of nitrate and resumed iron(II) oxidation, but iron(II) oxidation by the archaea was suppressed for the duration of the 12-week experiment [111].…”

Section: Microbial Growth Under Element Stressmentioning

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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“…nitrate required to inhibit ferrous ion oxidation by 50 % relative to a control was 0.085 g L -1 (0.001 M) at pH 0.94 and 2.125 g L -1 (0.025 M) at pH 3 (Alexander et al, 1987) and nitrate was more inhibitory to ferrous ion oxidation by At. ferrooxidans than to sulfur oxidation (Harahuc et al, 2000a;Razzell and Trussel, 1963). Niemelä et al (1994) reported that sodium nitrate (0.006 M) inhibited ferrous ion oxidation by a mixed culture of native microorganisms enriched from mine water.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…The concept of exploiting iron(II) oxidation inhibition using anions in base metal processing is not new. Harahuc et al (2000a) attempted to extract zinc selectively from pyritic tailings using At.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The effects of nitrate on substrate utilisation by some iron(II)- and sulfur-oxidising Bacteria and Archaea

2014

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The influence of nitrate on batch cultures of selected Acidithiobacillus, Sulfobacillus, Acidianus, Sulfolobus and Metallosphaera species capable of utilising iron(II) and reduced sulfur substrates was examined. Nitrate was added to cultures in media containing both ferrous ions and tetrathionate. The presence of nitrate resulted in decreased planktonic cell numbers, increased microbial lag times and lower ferrous ion and tetrathionate utilisation rates. These results varied with nitrate concentration, species and adaptive history. Based on the results of batch culture tests, nitrate was added to chalcopyrite concentrate bioleaching experiments to control the redox potential. Bacteria in bioleaching tests at 30 and 45 °C exhibited adaptation to nitrate resulting in high redox potentials.However, when archaea were used in bioleaching tests at 60 °C, ferrous ion oxidation was suppressed in the presence of nitrate. At a nitrate concentration of 20-30 mM, a redox potential of 430-460 mV (vs Ag/AgCl) was maintained during the 10 week experiment. At this redox potential copper extraction was increased by 20 % compared to a culture without nitrate, potentially offering a method of redox control for high-temperature stirred-tank bioleaching with archaea.

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Effect of anions on selective solubilization of zinc and copper in bacterial leaching of sulfide ores

Cited by 11 publications

References 33 publications

Microbiological Advances in Biohydrometallurgy

Microbiological Advances in Biohydrometallurgy

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

The effects of nitrate on substrate utilisation by some iron(II)- and sulfur-oxidising Bacteria and Archaea

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