Methods of Extracting Copper from Low Grade Ores: Bioleaching and Phytomining

The video discusses the extraction of copper from low-grade ores using two methods: bioleaching and phytomining. Bioleaching involves bacteria that produce a copper ion solution, which is then processed with scrap iron and electrolysis. Phytomining uses plants to absorb copper ions, which are then extracted from the ash after burning the plants. Both methods are environmentally friendly but produce small quantities of metal over a long time.

What is the main challenge with Earth's metal resources?

• They are all high-grade ores.

• They are unlimited.

• They are limited.

• They are easy to extract.

Which organism is primarily used in the bioleaching process?

• Fungi

• Bacteria

• Algae

• Viruses

What is the role of scrap iron in the bioleaching process?

• To purify copper ions

• To displace copper from the leachate

• To absorb copper ions

• To provide energy

How do plants contribute to phyto mining?

• By producing copper ions

• By absorbing copper ions from the soil

• By purifying copper ions

• By displacing copper ions

What is a disadvantage of both bioleaching and phyto mining?

• They destroy landscapes.

• They require high-grade ores.

• They produce large quantities of metals quickly.

• They produce small quantities of metals over a long time.