A Study on the Cation Exchange of [Co(NH3)6]3+ from H-Co (NH3)6-Vermiculite by Inorganic and Quaternary Ammonium Ions

J. L. Das Kanungo*
Department of Chemistry, University of North Bengal, P.O. North Bengal University, Dist. Darjeeling, West Bengal, India
* Present address: Department of Soil Science, University of Reading, Reading, England.

Abstract: The exchange of [Co(NH3)6] 3+ from its vermiculite complex has been carried out with a number of inorganic and alkyl quaternary ammonium ions of varying ionic sizes. The distribution and selectivity coefficients of the desorbing ions increase in the order: Li < Na < NH4 < K < Rb < H < Cs for the monovalent, Ca < Mg for the bivalent and (C2H5)4N<(CH3)4N≪CTA (cetyl trimethyl ammonium) <CP (cetyl pyridinium) for the organic ions. The ΔG° values of some of the cation exchange reactions have been calculated by an equation of Kielland (1935).

Clays and Clay Minerals; November 1975 v. 23; no. 5; p. 361-364; DOI: 10.1346/CCMN.1975.0230506
© 1975, The Clay Minerals Society
Clay Minerals Society (www.clays.org)