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Using microorganisms to extract metals from ores and mine waste is called as?

(a) Biomining

(b) Bioleaching

(c) Afforestation

(d) Hydrolysis

The question was asked during an internship interview.

Question is from Metal topic in portion Microbial Transformation of Heavy Metals of Environmental Biotechnology

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Correct option is (a) Biomining

The explanation: Hydrolysis is a method which refers to the breakdown of chemical substances by means of water, whereas, afforestation is planting of trees in the forest to restore the flora and fauna and help control pollution the environment, Biomining is the extraction of metals from their ores or mine waste using of microbes, whereas, bioleaching is dissolution of metals from ores using various microorganisms.

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