How to remove impurities from water?
How to remove impurities from water
We may remove solid particles by:
1 Sedimentation
2 Filtration
• Filter column
• Filter paper
3 Distillation
How to remove impurities from water
Sedimentation
• Can remove LARGE solid particles
• LARGE particles will settle in water
• Forming a layer of sediment at the
bottom
How to remove impurities from water
Filtration (by filter column)
• Can remove
FINE
solid particles
• FINE particles will be trapped
• Liquid collected under the
column is filtrate
How does the filtrate look?
How to remove impurities from water
Filtration (by filter paper)
• Work like a filter column
• Can remove FINE solid particles
particles (residue) will be
trapped
• FINE
• Liquid collected under the
column is filtrate
How to remove impurities from water
Distillation
• Boiling  condensation of water
• Can remove all impurities in water
boiling
water
condensation
steam
water
How to remove impurities from water
Distillation
water condenses
water
boils