Adsorption's the accumulation of atoms or molecules on the surface of a material. This process creates a film of the adsorbate (the molecules or atoms being accumulated) on the adsorbent's surface. It's different from absorption, in which a substance diffuses into a liquid or solid to form a solution. The term sorption encompasses both processes, while desorption's the reverse process. Adsorption's present in many natural physical, biological, and chemical systems, and's widely used in industri… (More on Adsorbtion)