Sorption 01
Sorption 01 : (a) A general term covering the processes of adsorption, absorption, desorption, ion exchange, ion exclusion, ion retardation, chemisorption, and dialysis. (1) Adsorption: surface retention of solid, liquid, or gas molecules, atoms, or ions by a solid or liquid; (2) Absorption: penetration of substances into the bulk of the solid or liquid; (3) Desorption: process of removing a sorbed substance by the reverse of adsorption or absorption. [AIHA, 2000: Risk Assessment Principles for the Industrial Hygienist]; (b) A class of processes by which one material is taken up by another. Absorption is refers to the process of the penetration of one material into another; adsorption to the action of one material being collected on another's surface. [SHSU, 2000: Atmospheric Chemistry Glossary, attributed to Crutzen, Paul (j) and Graedel, T.E. Atmospheric Change: An Earth System Perspective, p. 435]; (c) The action of soaking up or attracting substances; process used in many pollution control systems. [USEPA, 1997a: EPA Terms of Environment]
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