Adsorption is a surface phenomenon.
Adsorption is a process which involves the accumulation of a substance in molecular species in higher concentration on the surface. For the adsorption process, two components are required,
- Adsorbate: Substance that is deposited on the surface of another substance. For example, H2, N2 and O2 gases.
- Adsorbent: Surface of a substance on which adsorbate adsorbs. For example, Charcoal, Silica gel, Alumina.