Desorption

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Desorption is a phenomenon and process opposite of sorption (that is, adsorption or absorption), whereby some of a sorbed substance is released. This occures in a system being in the state of sorption equilibrium between bulk phase (fluid, i.e. gas or liquid solution) and an adsorbing surface (solid or boundary separating two fluids). When the concentration (or pressure) of substance in the bulk phase is lowered, some of the sorbed substance changes to the bulk state.

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