What is the role of alum (Phitkari) in the process of water purification?

Asked by Topperlearning User | 8th May, 2014, 09:20: AM

Expert Answer:

When alum is added to impure water, heavy particles of dissolved alum deposit on the suspended clay particles in water. In this way, water gets ‘loaded' with alum and becomes heavy and settles down at the bottom. This step is called as loading. It thus removes the suspended clay particles from water.

Answered by  | 8th May, 2014, 11:20: AM