In some cases, adsorption and absorption occur simultaneously and is called sorption. For ex., Dying a cloth.
Here colour get adsorbed as well absorbed by a cloth.
absorption and adsorption considered as a single process.
adsorption-is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent.
absorption--the state of being engrossed in something
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Manika Agarwal answered this
collection of foreign particles throughout the bulk but higher concentration at the surface is known as sorption.
eg: