How does alum purify water?
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Alum added to raw water reacts with bicarbonate alkalinities presents in water and form us gelatinous precipate.
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In water purification method alum acts as coagulant . A coagulant binds extremely fine and small particles suspended in raw impure water into larger particles that can be removed by filtration and settling .
This allows for the removal of unwanted colour and cloudiness( turbidity).
This allows for the removal of unwanted colour and cloudiness( turbidity).
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