Skip to content


A material with the ability to hold a fluid on its surface or within pores without causing a chemical or physical change to the adsorbed material.

This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent). Adsorption is a surface phenomenon, while absorption involves the whole volume of the material.

Zeolite, silica gel, alumina, and active carbon are examples of adsorbants.

Explore these categories