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Journal of Environmental Quality Abstract -

Phosphorus Movement in Soils: Soil-Orthophosphate Reaction Kinetics1


This article in JEQ

  1. Vol. 4 No. 2, p. 261-266
    Received: June 12, 1974

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  1. L. T. Novak and
  2. D. C. Adriano2



This paper presents four models to describe the kinetics of P adsorption-desorption reactions in soils. The mass transfer model, Langmuir kinetics model, and Langmuir-Hinshelwood models were developed and compared with phosphate adsorption data on a soil obtained by batch-shaken flask experiments.

For P adsorption times up to 3 hours, the mass transfer and Langmuir kinetics models described the experimental data very well. The Langmuir kinetics model gave a slightly better fit of the experimental data. These kinetic data probably represent an upper bound for unsaturated flow in soils.

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