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Gas–liquid absorption (a) and liquid–solid adsorption (b) mechanism. Blue spheres are solute molecules.

Sorption is a physical and chemical process by which one substance becomes attached to another. Specific cases of sorption are treated in the following articles:

  • Absorption – "the incorporation of a substance in one state into another of a different state"[1] (e.g., liquids being absorbed by a solid or gases being absorbed by a liquid);
  • Adsorption – the physical adherence or bonding of ions and molecules onto the surface of another phase (e.g., reagents adsorbed to a solid catalyst surface);
  • Ion exchange – an exchange of ions between two electrolytes or between an electrolyte.Both absorption and adsoption can take place simuntaneously, The term Sorption is used to describe these two processes solution and a complex.

See also[edit]


  1. ^ Crini, edited by Grégorio; Badot, Pierre-Marie (2010). Sorption processes and pollution : conventional and non-conventional sorbents for pollutant removal from wastewaters. Besançon: Presses universitaires de Franche-Comté. p. 43. ISBN 2848673044.