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Journal of Environmental Quality Abstract -

A Modified Langmuir Equation for Predicting Sorption of Methylacridinium Ion in Soils and Sediments1


This article in JEQ

  1. Vol. 14 No. 2, p. 195-199
    Received: Mar 30, 1984

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  1. David S. Brown and
  2. George Combs2



An empirical model for predicting sorption isotherms of organic cations was tested using a set of 10 soils and sediments. The model is based on a competitive Langmuir equation with modifications for grouping the various competing ion species and for normalizing over a broad range of sediment properties. Normalization is accomplished by substituting cation exchange capacities (CECs) determined with NH4+ for the Langmuir capacity term. Natural exchange ions are grouped and treated as a single competing species for simplicity. A single calibration enables estimation of sorption isotherms for other sediments for which estimates of CECs and competing electrolyte concentrations are known.

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