Lithium-Calcium Exchange Equilibria in Soils and Clays1
- F. L. Bair and
- P. F. Pratt2
Cation-exchange equilibria at pH 7 were determined for a number of soils and clays using Li adsorption ratios (LAR) of 0.2 to 20 (mmoles/liter)½. Data for montmorillonite and montmorillonitic soils gave linear relationships between exchangeable Li ratio (ELR), or ratio of exchangeable Li to exchangeable Ca, and LAR; similar slopes were obtained in all cases. However, relationships between ELR and LAR for kaolinite and kaolinitic soils were all curvilinear with a relatively high adsorption affinity for Li at low Li concentrations, indicating that this high affinity for Li existed only in a small fraction of the cation-exchange capacity of these materials. Drying in a Li-saturated form increased the affinity of kaolinite for Li but had only a small effect on montmorillonite.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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