Development of Leptospirillum ferriphilum dominated consortium for ferric iron regeneration and metal bioleaching under extreme stresses

Patel, Bhargav C.; Tipre, Devayani R.; Dave, Shailesh R.

doi:10.1016/j.biortech.2012.05.094

Cited by 31 publications

(14 citation statements)

References 26 publications

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“…• two-stage indirect bioleaching, in which ferric ion oxidation of sulfides and ferric ion regeneration by microorganisms are effected in separately optimised bioreactors [137,[210][211][212], and…”

Section: Polymetallic Sulfide Concentratesmentioning

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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Section: Polymetallic Sulfide Concentratesmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

140

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“…It has been proved that bacteria of the genus Acidithiobacillus sp. and Leptospirillum sp., etc, which involved in these transformations, are capable of growing in highly acidic environment with highly heavy metal content [3,4]. Additionally, the bioleaching of a low-grade uranium ore using both single and mixed two cultures of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans has been studied in this process and the result showed that the best of uranium recovery were obtained with the mixed culture [5].…”

Section: Introductionmentioning

confidence: 96%

Bioleaching of Uranium Ore Containing Fluorite Using Acidithiobacillus ferrivoran, Acidithiobacillus ferrooxidans and Leptospirillum ferriphilum

Mo¹,

Wen³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. The results of MLA automated quantitative mineralogy system indicated the uranium ore used in this study was mainly composed of pitchblende (0.47%), quartz (64.91%), fluorite (2.18%) and pyrite (0.44%). The existence of fluorine-containing minerals plays a strong inhibition role of bacterial activity in the bioleaching process. The chemical characteristics showed that the content of U ( ) Ⅳ (0.18%)was significantly higher than that of U () Ⅵ , and the U () Ⅳ / U () Ⅵ ratio was 4.5. It is difficult to dissolve with sulfuric acid due to relatively higher U () Ⅳ in this uranium ore. The fluoride-tolerance mixed microbes were used for bioleaching of uranium, and the bioleaching and acid leaching experiments of fluoride-containing uranium ore were investigated in column reactor. The uranium extration rate of bioleaching column reached 72% in 38 days, using bioleaching have obvious advantages compare to conventional acid leaching (65%).

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“…Our experiment was designed to examine the effect of different iron-contained minerals (pyrite or chalcopyrite) on the sphalerite bioleaching (microbial community structure, dynamic, and the relationship between biodiversity and function) using an artificial consortium, including ironoxidizing, sulfur-oxidizing, and organism-oxidizing microbes (Africa et al 2013;Patel et al 2012;Yu et al 2014;Zhang et al 2014). 16S rRNA gene sequencing technology was used to monitor the microbial community diversity, composition, and structure.…”

Section: Introductionmentioning

confidence: 99%

The complicated substrates enhance the microbial diversity and zinc leaching efficiency in sphalerite bioleaching system

Xiao

Dong

et al. 2015

Appl Microbiol Biotechnol

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This study used an artificial enrichment microbial consortium to examine the effects of different substrate conditions on microbial diversity, composition, and function (e.g., zinc leaching efficiency) through adding pyrite (SP group), chalcopyrite (SC group), or both (SPC group) in sphalerite bioleaching systems. 16S rRNA gene sequencing analysis showed that microbial community structures and compositions dramatically changed with additions of pyrite or chalcopyrite during the sphalerite bioleaching process. Shannon diversity index showed a significantly increase in the SP (1.460), SC (1.476), and SPC (1.341) groups compared with control (sphalerite group, 0.624) on day 30, meanwhile, zinc leaching efficiencies were enhanced by about 13.4, 2.9, and 13.2%, respectively. Also, additions of pyrite or chalcopyrite could increase electric potential (ORP) and the concentrations of Fe3+ and H+, which were the main factors shaping microbial community structures by Mantel test analysis. Linear regression analysis showed that ORP, Fe3+ concentration, and pH were significantly correlated to zinc leaching efficiency and microbial diversity. In addition, we found that leaching efficiency showed a positive and significant relationship with microbial diversity. In conclusion, our results showed that the complicated substrates could significantly enhance microbial diversity and activity of function.

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Development of Leptospirillum ferriphilum dominated consortium for ferric iron regeneration and metal bioleaching under extreme stresses

Cited by 31 publications

References 26 publications

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Bioleaching of Uranium Ore Containing Fluorite Using Acidithiobacillus ferrivoran, Acidithiobacillus ferrooxidans and Leptospirillum ferriphilum

The complicated substrates enhance the microbial diversity and zinc leaching efficiency in sphalerite bioleaching system

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