Q11. Chemical used in sedimentation during purification of water
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Adding special chemicals or some natural coagulants can accelerate sedimentation. Three common chemicals used are aluminium sulphate, polyaluminium chloride (also known as PAC or liquid alum) and ferric sulphate. 'PUR' is a powder product containing both coagulants and disinfectant.
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Three chemicals aluminium, sulphate, polyaluminium chloride are used in sedimentation during purification of water.
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