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Soil Science Society of America Journal Abstract -

Reduction in Salt Content of Solution on Passing Through Thin Films Adjacent to Charged Surfaces1


This article in SSSAJ

  1. Vol. 28 No. 3, p. 318-323
    Received: Oct 15, 1963
    Accepted: Feb 17, 1964

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  1. W. D. Kemper and
  2. D. E. L. Maasland2



An equation was derived to measure the effect of salt and water diffusion on salt reduction of solutions forced through thin films of water by pressure differentials. Salt concentrations of solutions which had passed through thin films adjacent to charged particles were calculated from the equation and are plotted as a function of pressure differential, ionic mobility, film thicknesses, and cation valences. Experimental evidence showed that salt sieving increases as the pressure forcing solution through the clays increases. Salt sieving generally increases as the pores through which the water flows decrease in size, and is smaller when the soil is saturated with divalent rather than monovalent ions. These observations were in agreement with the theory.

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