Adsorption As Separating Process
Adsorption is a thermodynamic separation process, which is characterized by the removal of molecules out of a fluid phase at a solid surface. Molecules of a gaseous or fluid mixture are selectively taken up by a solid with a porous interface surface. The solid matter is called the adsorbant, the adsorbed fluid is called the adsorbate. There are two types of adsorption, physisorption and chemisorption. The type of force driving the adsorption process is different between the two.
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—Archie Randolph Ammons (b. 1926)
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—Joan Sheingold Ditzion, Dennie, and Palmer Wolf. Ourselves and Our Children, by Boston Women’s Health Book Collective, ch. 2 (1978)