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Soil Science Society of America Journal Abstract -

Chloride Diffusion in Clay-Water Systems1

 

This article in SSSAJ

  1. Vol. 30 No. 1, p. 22-25
     
    Received: Mar 23, 1965
    Accepted: Oct 7, 1965


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doi:10.2136/sssaj1966.03615995003000010014x
  1. J. C. van Schaik and
  2. W. D. Kemper2

Abstract

Abstract

Self-diffusion coefficients of chloride were determined in sodium-and calcium-saturated bentonite in steady and transient state systems. In steady state systems a decrease in diffusive flow with lower salt concentrations in the equilibrium solutions can be attributed to anion exclusion in clay-water systems. In transient state systems the influence of the free electrolyte concentration on the porous system diffusion coefficient of chloride is practically negligible. An observed reduction by about 50% in the apparent diffusion coefficient of anions in these systems was attributed to heterogeneity of the negative adsorption due to a wide range of pore sizes.

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