Question

What is the difference between colloidal impurity and suspended impurities?

Answer 1

The difference between colloidal impurity and suspended impurity is as follows,

Colloidal impurity	Suspended impurity
Some of the molecules are agglomerated with the boundary surface between the solid phase water and are refered to as colloidal impurities.	Suspended impurities are the impurities that are partially soluble in water, and kept suspended in water.
The particle size is between $1\mathrm{to}1000\mathrm{nm}$	The particle size is above $1000\mathrm{nm}$
For example, gelatinous mixture	For example, a mixture of sand and water.