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This article in SSSAJ

  1. Vol. 21 No. 1, p. 20-24
    Received: Sept 3, 1955
    Accepted: May 29, 1956

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Dynamics of Cation Exchange in Soil Columns1

  1. C. A. Bower,
  2. W. R. Gardner and
  3. J. O. Goertzen2



Equations for describing the process of ion exchange during passage of a salt solution through an exchanger column have been given by H. C. Thomas. N. K. Hiester, T. Vermeulen, and A. Opler have extended these equations and have provided graphic and numerical solutions.

In the present study, the equations have been applied to the problem of determining the distributions of dissolved and adsorbed cations in soil columns as functions of depth and volume of solution applied. Two cases were studied: (1) saturation of soil initially free of the saturating cation by a solution containing only this cation, and (2) equilibration of soil having two cationic species initially present uniformly with a mixed solution of the two cations. For exchange between ion pairs of both equal (Mg and Ca) and unequal (Na and Ca) valence, the experimental results agreed quite satisfactorily with those predicted by the equations.

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