Key learning points

1. In phytoextraction, metal is extracted from a crop of plants that absorb metal ions through their roots.
2. In bioleaching, metal is extracted from bacteria that extract metal from an ore.
3. Electrolysis is a process used to separate metals from their compounds.
4. There are advantages and disadvantages associated with each method of extracting metals.

Common misconception

Keywords

• Low-grade ore - An ore is a rock that contains metals or metal compounds. A low-grade ore contains a lower percentage of metal or metal compound than a high-grade ore.

• Phytoextraction - Phytoextraction is a method of extracting metals by growing plants in soil containing low-grade ore.

• Displacement - Displacement is where a more reactive element takes the place of a less reactive element in a compound.

• Electrolysis - Electrolysis is a process that uses electricity to break down a compound.

• Bioleaching - Bioleaching is a method of extracting metals by growing bacteria on low-grade ores to produce a leachate.