Discussion
The process of using bacteria for extraction of valuable metals in mining industry is known as :
Answer: B
The process is Bioleaching.
In bioleaching, acidophilic bacteria such as Acidithiobacillus ferrooxidans oxidise ferrous iron and sulphide minerals. The ferric iron and sulphuric acid they produce dissolve metals such as copper, uranium and gold-bearing sulphides from low-grade ore, and the metal is recovered from the leach solution. A large share of the world's copper is produced this way.
Biodegradation is the breakdown of organic compounds by microbes. Biosorption is the passive binding of metal ions to microbial biomass, used mainly to remove metals from waste water. Bioremediation is the use of organisms to clean up pollutants; none of these is the extraction of metals from ore.
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