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Microbial leaching for valuable metals harvesting: versatility for the bioeconomy

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Abstract

Challenges in the course of sustainable development, predominantly dearth of natural resources and waste management have suggested scientific community across the globe to seek novel processes to reduce ecological disturbances. For this purpose, microbial leaching process; a commercial application of bio-hydrometallurgy, could be a better option as it serves as a potential candidate for the retrieval of precious metals from low grade ores containing very low metal concentration, and sulfide minerals. It can also effectively remove excess of metals from soil and sediments and even recover metals from discarded solid waste. The present article intends to highlight the valuable metals which are being recovered by the process of microbial leaching from various kind of solid waste, the mechanism by which metals are mobilized, commercially used bioleaching processes along with their benefits and shortcomings, conditions and factors necessary for the optimization of the microbial leaching process. Emphasis is also being given to the extraction of metals from metal polluted soil and sediments using leaching organisms. It is to be concluded that microbial leaching is a revolutionizing technique bringing out both recovery of metals from solid materials including metal contaminated soil as well as remediation of soil using micro-organisms.

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Correspondence to Richa Kothari.

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Kour, G., Kothari, R., Mohan Singh, H. et al. Microbial leaching for valuable metals harvesting: versatility for the bioeconomy. Environmental Sustainability 4, 215–229 (2021). https://doi.org/10.1007/s42398-020-00143-9

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  • DOI: https://doi.org/10.1007/s42398-020-00143-9

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