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What is not an example of adsorption?

removing moisture from the air

dissolution of gases in water

odor absorption by a carbon filter

absorption of toxins by medical coal

Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process differs from absorption, in which a fluid is dissolved by or permeates a liquid or solid, respectively. Adsorption is a surface phenomenon, while absorption involves the whole volume of the material.

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Andrew Malone wikipedia → Adsorption

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