Predicting removal of major soil cations and anions during acid infiltration: model evaluation

Document Type

Article

Publication Date

1-1-1992

Abstract

The objective of this study was to assess the capability of a simple model for soil acidification to describe changes in solution- and sorbed-phase compositions of acid soil subjected to inputs of H ion. Columns of Cecil series and Candler series soils were leached with pH 3.0, 3.7, and 4.7 solutions. The model adequately described effluent pH. However, it tended to overpredict concentrations of basic cations removed by infiltration of pH 3.0 and 3.7 solutions: conversely, it underpredicted concentrations of Al from columns leached with the pH solution. These discrepancies may reflect an inadequacy of simple equilibrium models for cation exchange and Al solubility. Extension of the model to include exchange kinetics improved predictions of effluent Ca and Mg concentrations. -from Authors

Publication Source (Journal or Book title)

Soil Science Society of America Journal

First Page

944

Last Page

950

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