Potential impact of microbial consortia in biomining and bioleaching of commercial metals

Komal Ijaz, Javed Iqbal Wattoo, Basit Zeshan, Tanveer Majeed, Tanzeela Riaz, Sehar Khalid, Shahjahan Baig

Abstract


Biomining is the use of microorganisms for the commercial extraction of lavish metals from ores and mines with least effect on environment. Microbes play vital role in bioleaching procedures in commercial mining. The bacterial cells are used to detoxify/replace waste cyanide, marginal biomass and activated carbon. These methods are preferred over conventional techniques due to energy efficient, low cost, environment friendly and production of useful by-products. At industrial scale, different microbial strains (Acidophilic, Sulphobacillus, Rhodococcus, Ferrimicrobium &chemolithotrophic) are deployed to boost the processes of copper and uranium bioleaching. About 20% of the world’s copper is extracted by using this technique. These extraction procedures involve oxidation of insoluble metal sulphides to soluble sulphates. The isolation of thermophilic microbes for mineral biooxidation increase the commercial extraction of minerals at industrial scale. The conventional pyrometallurgical techniques have environmental concerns as they result in depletion of high grade ores and release harmful gaseous. The microbe-assisted gold mining is expected to double the yield of gold and needs to be fully explored using diverse array of microbes. Bioleaching is simple and low cost method for the developing countries with large ore deposits. About 30 strains of microbes have been discovered so for with potential impact on bioleaching. With advances in molecular genetics, physiology and microbial genomics, more promising strains with increased bioactivities are possible. Further efforts are underway to culture diverse range of archaea and improving its genetic potential to be used as industrial tool for commercial bioleaching. The currents review enlightens the recent trends in biomining/bioleaching and implementation of modern biological approaches to engineer target microbes for commercial use.

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References


Siddique MH, Kumar A, Kesari KK, Arif JM. Biomining – A Useful approach toward metal extraction. American-Eurasian Journal of Agronomy, (2009); 2 (2): 84-88.

May N, Ralph DE, Hansford GS. Dynamic redox potential measurement for determining the ferric leach kinetics of pyrite. Minerals Engineering, (1997); 10; 1279-1290.

Nedelkoska TV, Doran PM. Characteristics of heavy metal uptake by plantspecies with potential for phytoremediation and phytomining. Minerals Engineering, (2000); 13(5): 549-561.

Clark DA, Norris PR. Acidimicrobium ferrooxidans gen. nov., sp. nov.: mixed-culture ferrous iron oxidation with Sulfobacillus species. Microbiology, (1996); 142: 785-790.

Johnson DB, Barry MG, Kevin BH. A New Direction for Biomining: Extraction of Metals by Reductive Dissolution of Oxidized Ores and Minerals, (2013); 3, 49-58.

Brierley CL. How will biomining be applied in future?. Trans. Nonferrous Met. Soc. China 18. (2008); 1302-1310.

Schippers A, Sand W. Bacterial leaching of metal sulfides proceeds by two indirect mechanisms via thiosulfate or via polysulfides and sulfur. Applied and Environmental Microbiology, (2009); 65: 319-321.

Rafi U, Bakht J, Shafi M, Iqbal M, Khan A, Saeed M. Phyto-accumulation of heavy metals by sunflower (Helianthus annuus L.) grown on contaminated soil. African Journal of Biotechnology, (2011); 10 (75), pp. 17192-17198.

Moore P. Scaling fresh heights in heap-leach technology Journal of Mining Magazine, (2008); 198 (4): 54−66.

Mular A L, Halbe D N, Barret D J. Mineral Processing, Plant Design, Practice and Control. Littleton, Colorado: Society of Mining Engineers, (2002); 1540−1568.

Nedelkoska TV, Doran PM. Characteristics of heavy metal uptake by plant species with potential for phytoremediation and phytomining. Minerals Engineering, (2000); 13(5): 549-561.

Schippers A, Sand W. Bacterial leaching of metal sulfides proceeds by two indirect mechanisms via thiosulfate or via polysulfides andsulfur. Applied Environmental Microbiology, (1999); 65: 319-321.

Rawlings DE. Heavy metal mining using microbes. Annual Reviews in Microbiology, (2002); 56: 65–91.

Prasad MNV. Sunflower (Helinathus annuus L.) – a potential crop for environmental industry.Helia, (2007); 30, 167-174.

Bano SA, Ashfaq D. Role of mycorrhiza to reduce heavy metal stress. Natural Science, (2013); 12A, 16-20.

Malcova R, Vosatka M, Gryndler M. Effects of inoculation with Glomus intraradices on lead uptake by Zea mays L. and Agrostis capillaris L. Applied Soil Ecology, (2003); 23, 255-267.

Nagpal S. Donald D, Timothy O. Effect of carbon dioxide concentration on the bioleaching of a pyrite arsenopyrite ore concentrates. Biotechnology and Bioengineering, (1993); 41: 459-464.

Norris PR. Iron and mineral oxidation with Leptospirillum-like bacteria. Recent Progress in Biohydro-metallurgy, (1983); 83-96. Edited by G. Rossi and A.E. Torma. Iglesias, Italy, Association.




DOI: http://dx.doi.org/10.62940/als.v5i1.473

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