Influence of Adsorbed Water on Exchangeable Ion Movement

Philip F. Low
Purdue University, Lafayette, Indiana

Abstract: The concept of activation energy for ion movement is discussed. It is shown that the activation energy for exchangeable ion movement is directly correlated with the specific volume of the adsorbed water, with the resistance to freezing of this water and with the activation energy for deuterium oxide diffusion in this water. Electrical interaction between ion and clay appears to have little effect on the activation energy. Consequently, it is concluded that the most important factor governing exchangeable ion movement in the pores of a clay-water system is the structure of the adsorbed water.

Clays and Clay Minerals; 1960 v. 9; no. 1; p. 219-228; DOI: 10.1346/CCMN.1960.0090112
© 1960, The Clay Minerals Society
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