Alternative methods of extracting metals: phytoextraction and bioleaching
I can describe how metals are extracted by phytoextraction and bioleaching and compare different methods of metal extraction.
Alternative methods of extracting metals: phytoextraction and bioleaching
I can describe how metals are extracted by phytoextraction and bioleaching and compare different methods of metal extraction.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- In phytoextraction, metal is extracted from a crop of plants that absorb metal ions through their roots.
- In bioleaching, metal is extracted from bacteria that extract metal from an ore.
- Electrolysis is a process used to separate metals from their compounds.
- There are advantages and disadvantages associated with each method of extracting metals.
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.
Common misconception
Students struggle to distinguish between phytoextraction and bioleaching.
Reinforce that the term 'phyto' is a combining form meaning 'plant'.
Equipment
None required.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
