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Soil Science Society of America Journal Abstract -

Numerical Approximation of Cation Exchange in Miscible Displacement through Soil Columns1


This article in SSSAJ

  1. Vol. 35 No. 6, p. 894-899
    Received: Apr 13, 1971
    Accepted: July 29, 1971

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  1. Sung-Ho Lai and
  2. J. J. Jurinak2



The cation exchange process in soil columns during the miscible displacement of cation solutions was studied. The model involves the assumption that equilibrium between the cation adsorbed and the cation in solution exists. The material balance equation that governs the miscible displacement of cations includes and exchange function and was solved by a finite difference method. This method is capable of solving the material balance equation whether a linear or nonlinear cation exchange isotherm defines the exchange reaction. The applicability of the model and method of solution was tested by conducting soil column experiments. The agreement between the numerical solution and the experimental values was good.

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