ADSORPTION FROM BINARY-LIQUID MIXTURES ON COMMERCIAL ACTIVATED CARBONS

Adsorption from binary liquid mixtures of completely miscible componen ts of different polarity was studied, in order to characterize the ads orption properties of commercial activated carbons. The excess adsorpt ion isotherms were measured for three binary liquid systems: acetone n-heptane, acetone + benzene, and benzene + n-heptane on four activat ed carbons of various ash content. Textural characteristics of the ads orbents were determined on the basis of the adsorption/desorption isot herms of argon at 77.5 K. The relationship between the extent of adsor ption from the liquid phase as well as the shape of the adsorption iso therms and various parameters characterizing the investigated activate d carbons are discussed. A good agreement is found as far as the actua l surface area of the materials is concerned.