ADSORPTION

The process of adsorption involves the separation of liquids, gases, colloids, or suspended matter from a medium by adhering to the surface or pores of a solid. Essentially, the molecules of these elements adhere to the surface of a solid or liquid rather than entering it. The molecules are only loosely held by the surface and can be easily released.

Adsorption can be reversed, leading to both the adsorption and release of matter. In most cases, adsorption is explained through equilibrium equations that estimate the degree of matter attached to the surface in relation to the concentration in the fluid. One example of the adsorption process is the use of charcoal in gas masks to remove impurities (such as poison) from the air supply.

Adsorption can occur through either physical or chemical means. Chemical adsorption typically occurs at higher temperatures than physical adsorption and is a slower process that requires more energy, similar to many chemical reactions.