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Questions and Answers

What is the critical bacterial oxidation involved in microbial leaching of copper?

Oxidation of copper ion (Cu3+) to cuprous ion (Cu2+)

Oxidation of ferric ion (Fe3+) to ferrous ion (Fe2+)

Oxidation of copper ion (Cu2+) to cupric ion (Cu3+)

Oxidation of ferrous ion (Fe2+) to ferric ion (Fe3+) (correct)

What is the primary bacterial species involved in uranium leaching?

Pseudomonas aeruginosa

Leptospirillum ferrooxidans

Acidithiobacillus thiooxidans

Acidithiobacillus ferrooxidans (correct)

What is the form in which uranium becomes highly soluble during leaching?

Uranium oxide (UO3)

Uranyl sylfate (UO2SO4) (correct)

Uranium hydroxide (U(OH)4)

Uranium chloride (UCl4)

What is the role of Acidithiobacillus ferrooxidans in gold leaching?

Leaching the arsenic and pyrite Signup and view all the answers

What is the primary method used for microbial leaching of copper?

Dumping low-grade ore in a large pile and adding dilute sulfuric acid Signup and view all the answers

What percentage of worldwide copper mining is obtained by microbial leaching?

About a quarter Signup and view all the answers

What is the pH of the dilute sulfuric acid added in microbial leaching of copper?

pH 2 Signup and view all the answers

What is the primary function of the precipitation pond in microbial leaching of copper?

To enrich the liquid emerging from the bottom of the pile in dissolved metals Signup and view all the answers

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