Adsorption by Organo-Clay Complexes—Part 2

C. T. Cowan
The Fullers' Earth Union Ltd., Patteson Court, Redhill, Surrey

Abstract: A detailed investigation of the adsorption, of phenol and m-cresol from dilute aqueous solution by dodecyl- and tetradecylammonium bentonites has been carried out. The Freundlich isotherms for the tetradecylammonium bentonite system indicate that during adsorption, the process proceeds in two stages, the partial molar heat of adsorption changing from a positive to a negative value with a relatively small change in concentration of adsorbate. In the light of these findings, the aspects of the adsorption are discussed in terms of thermodynamic quantities, spatial considerations, and interlamellar expansion of the clay mineral.

Clays and Clay Minerals; 1961 v. 10; no. 1; p. 226-234; DOI: 10.1346/CCMN.1961.0100118
© 1961, The Clay Minerals Society
Clay Minerals Society (www.clays.org)