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.
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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'.
To help you plan your year 11 chemistry lesson on: Alternative methods of extracting metals: phytoextraction and bioleaching, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 chemistry lesson on: Alternative methods of extracting metals: phytoextraction and bioleaching, download all teaching resources for free and adapt to suit your pupils' needs.
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Starter quiz
6 Questions
