抄録
The adsorption equilibrium of water soluble 1-butanol and valeric acid on the surface-modified and surface-unmodified activated carbons in aqueous solutions was examined. An activated carbon, Pittsburg Activated Carbon (Calgon Co.), was used as an adsorbent, and it was treated with nitric acid, hydrochloric acid, hydrofluoric acid, and hydrogen. The adsorption isotherms were found to conform with the Freundlich equation. The adsorption capacity of both 1-butanol and valeric acid on the modified activated carbons decreased in the following order.
H2·HCl·HF>H2 treated>HCI·HF>unmodified>13.2N HNO3
The adsorption capacity is expected to change in relation to the nature of surface oxides on the activated carbons. The adsorption capacity of valeric acid was higher than that of 1-butanol.
