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Erschienen in:
2011 | OriginalPaper | Buchkapitel
9. Adsorption, Chromatography, Ion Exchange
verfasst von : Prof. Dr.-Ing. Alfons Mersmann, Prof. Dr.-Ing. Matthias Kind, Prof. Dr.-Ing. Johann Stichlmair
Erschienen in: Thermal Separation Technology
Verlag: Springer Berlin Heidelberg
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Abstract
Adsorption is the loading of solid surfaces with substances present in a surrounding fluid phase or, in other words, it is a surface effect between a solid and a fluid phase. Sometimes molecules of the fluid phase are not only fixed on the surface but can additionally enter the bulk of the nonporous solid phase according to a volume effect. This is called occlusion or absorption. When it is not known which of these two effects is dominant the term “sorption” is used. Adsorption means the loading of one or several components (adsorptives) on a solid material (adsorbent). The reverse process, e.g., the separation of adsorptives from the surface is called desorption.