Environmental studies water treatment (AQA)

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Name the 8 treatments water goes through to be suitable to drink
Screens, Sedimentation, Aeration, Flocculation, Filters, Activated carbon treatment, Sterilisation, Fluoridation
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Describe what happens in the process: Screens
A metal mesh is used to remove any floating vegitation in the water
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Describe what happens in the process: Sedimentation
The water is allowed to settle which allows any floating debris not removed from the screens to settle
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Describe what happens in the process: Aeration
Water is aerated to allow for a high oxygen content in the water this will remove bad smells
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Describe what happens in the process: Flocculation
Flocculants are added to the water to remove clay particles
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Describe what happens in the process: Filtration
Filters are used to remove any remaining suspended solids and bacteria
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Describe what happens in the process: Activated Carbon Treatment
Particles of activated carbon are used to remove pesticides
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Describe what happens in the process: Sterilisation
Chlorine or ozone is added to the water or it is exposed to UV to remouve pathogens
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Describe what happens in the process: Fluoridation
Fluorine is added to the water to improve dental health of the people drinking the water
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What other treatments will sea water need to undergo to be suitable for drinking?
Reverse osmosis: moving water at high pressure through a partially permeable membrane, Distillation: Boil the water and reduce pressure, condensation is then collected.
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Other cards in this set

Card 2

Front

A metal mesh is used to remove any floating vegitation in the water

Back

Describe what happens in the process: Screens

Card 3

Front

The water is allowed to settle which allows any floating debris not removed from the screens to settle

Back

Preview of the back of card 3

Card 4

Front

Water is aerated to allow for a high oxygen content in the water this will remove bad smells

Back

Preview of the back of card 4

Card 5

Front

Flocculants are added to the water to remove clay particles

Back

Preview of the back of card 5
View more cards

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