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Published in Soil Sci Soc Am J 42:671-674 (1978)
© 1978 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Coupling Phenomena in Saturated Homo-ionic Montmorillonite: III. Analysis1

P. H. Groenevelt, D. E. Elrick and T. J. M. Blom2

ABSTRACT

The data presented in the first paper of this series are analyzed using the theoretical transport equations and the analytical expressions for the transport coefficients developed in the second paper of the series.

When the electrodes of the system presented in Part 1 of this series are not shorted the predicted behavior corresponds precisely with the actual behavior.

Upon shorting the electrodes, the data indicate that the actual shorting of the clay-water system is not perfect, an indication that the electrodes cannot release and absorb Cl- ions infinitely fast. From the data the shorting efficiency is calculated. The flux of cations through the clay-water system while the electrodes are shorted can then be calculated. The absolute value of this flux appears to be slightly larger than the value calculated from the decrease in time of the salt concentration difference in the two liquid compartments. This is likely due to the buildup of a salt concentration gradient in the membranes.

NOTES

1 Contribution from the Dep. of Land Resource Science, Univ. of Guelph, Guelph, Ontario, Canada. The authors acknowledge support from the National Research Council of Canada.

2 Professional Associate, Professor, and Graduate Student, respectively. The present address of the last author is: Agriculture Extension Service, Vineland, Ontario, Canada

Received for publication February 10, 1978. Accepted for publication May 23, 1978.






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Copyright © 1978 by the Soil Science Society of America.