# Sorption

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{{Short description|Physical or chemical process by which one substance becomes attached to another}}
{{Use dmy dates|date=October 2014}}
thumb|500px|Gas–liquid absorption (a) and liquid–solid adsorption (b) mechanism. Blue spheres are solute molecules.

'''Sorption''' is a [physical](/source/physics) and [chemical](/source/chemistry) process by which one [substance](/source/Chemical_substance) becomes attached to another. Specific cases of sorption are treated in the following articles:
; [Absorption](/source/Absorption_(chemistry)): "the incorporation of a substance in one state into another of a different state"<ref>{{cite book|editor-last=Crini|editor-first=Grégorio|editor2=Badot, Pierre-Marie|title=Sorption processes and pollution : conventional and non-conventional sorbents for pollutant removal from wastewaters|date=2010|publisher=Presses universitaires de Franche-Comté|location=Besançon|isbn=978-2848673042|page=43 }}</ref> (e.g., [liquid](/source/liquid)s being absorbed by a [solid](/source/solid) or [gases](/source/gases) being absorbed by a liquid);
; [Adsorption](/source/Adsorption): The physical adherence or bonding of [ion](/source/ion)s and [molecule](/source/molecule)s onto the surface of another phase (e.g., reagents adsorbed to a solid [catalyst](/source/catalyst) surface);
; [Ion exchange](/source/Ion_exchange): An exchange of [ion](/source/ion)s between two [electrolyte](/source/electrolyte)s or between an electrolyte [solution](/source/solution_(chemistry)) and a [complex](/source/complex_(chemistry)).

The reverse of sorption is [desorption](/source/desorption).

==Sorption rate==
The adsorption and absorption rate of a diluted solute in gas or liquid solution to a surface or interface can be calculated using [Fick's laws of diffusion](/source/Fick's_laws_of_diffusion).

==See also==
* [Sorption isotherm](/source/Sorption_isotherm)

==References==
{{Reflist}}

{{Wiktionary}}

Category:Physical chemistry

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Adapted from the Wikipedia article [Sorption](https://en.wikipedia.org/wiki/Sorption) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Sorption?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.