AQA GCSE Chemistry · 8462
Specification 4.10.1.2 · Paper 2
Revise: Water Treatment and PotabilityFiltration removes insoluble particles and sterilisation deals with microbes. Neither process removes a high concentration of dissolved salt.
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GCSE Chemistry · key term
Treatment that kills microorganisms in water, for example using chlorine, ozone or ultraviolet light.
Used by AQA
Specification 4.10.1.2 · Paper 2
Revise: Water Treatment and PotabilityFiltration removes insoluble particles and sterilisation deals with microbes. Neither process removes a high concentration of dissolved salt.
Link each treatment step to its purpose: filter beds remove insoluble material; sterilisation kills microbes; desalination removes dissolved salts.
When comparing sources, explain that fresh water generally needs filtration and sterilisation, whereas salty water also needs an energy-intensive desalination stage.
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