The interaction of pyridine with the surface of active carbons

The adsorption and desorption of pyridine on the surface of granulated active carbons was studied. It was shown that pyridine was extracted from aqueous solutions because of physical adsorption and specific adsorption with the formation of H-bonds with oxygen-containing surface groups. The desorption of pyridine at temperatures up to 400°C did not cause its complete removal from the surface of adsorbents. The fraction of pyridine remaining on the surface was proportional to the amount of oxygen-containing surface groups of active carbons of the acid type.