Adsorption

The adhesion, in an extremely thin layer, of molecules (as in gases, solutions, or liquids) to the surface of solid bodies or liquids with which they are in contact.

The process by which chemicals are held on the surface of a mineral or soil particle. The adherence of a gas, liquid, or dissolved material on the surface of a solid. An increase in concentration of gas or solute at the interface of a two-phase system. Should not be confused with absorption.