adsorber

As nouns the difference between adsorber and adsorbent

is that adsorber is something which adsorbs, especially a solid material, such as activated carbon, that has a high surface area and is used to capture a gas or liquid while adsorbent is the solid or liquid in the process of adsorption on which the adsorbate accumulates.

As an adjective adsorbent is

tending to adsorb.

As a noun adsorber

is something which adsorbs, especially a solid material, such as activated carbon, that has a high surface area and is used to capture a gas or liquid.

As a verb adsorbed is

(adsorb).