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11 Questions

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Bioleaching pH and Oxygen Requirements

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Questions and Answers

What is the optimal pH range for maximum bioleaching results?

pH 3.5-4.0

pH 1.5-2.0

pH 2.5-3.0 (correct)

pH 4.5-5.0

What is the purpose of adding surfactants in bioleaching?

To decrease surface tension and enhance bacterial contact (correct)

To reduce mechanical agitation

To increase metal concentration

To increase oxygen supply

What is a key factor in providing adequate oxygen for leaching bacteria?

High-temperature maintenance

Mechanical agitation

Aerators and pipes (correct)

Surfactant addition

What is an environmental advantage of bioleaching over conventional mining techniques?

It avoids pollution Signup and view all the answers

What is a cost-related advantage of bioleaching?

It offers a cost-effective method for metal recovery Signup and view all the answers

What is a characteristic of bioleaching technology?

It is simple and low-cost Signup and view all the answers

What is the main drawback of bioleaching?

It is a slow biological process. Signup and view all the answers

Which microorganism is responsible for oxidizing chalcopyrite?

Thiobacillus ferrooxidans Signup and view all the answers

What is the byproduct formed in the reaction of bioleaching?

Sulfuric acid Signup and view all the answers

What percentage of leached copper originated from bioleaching of sulfide copper minerals in 2010?

38% Signup and view all the answers

What percentage of bioleached copper originates from heap bioleaching secondary copper ores?

80% Signup and view all the answers