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Phosphate Sorption by Some Alfisols of Greece as Described by Commonly Used Isotherms¹

ABSTRACT

The one- and two-surface Langmuir, the Freundlich, and the Temkin isotherms were fitted to P sorption data for 14 representative alfisols of Greece. Each was found to describe P sorption by these soils with comparable success, with the Freundlich and the two-surface Langmuir isotherms being slightly superior. The Freundlich equation is characterized by simplicity of form, based on more realistic assumptions, and now capable of rigorous derivation. It can therefore be used in preference to the others, since its parameters, as those of the Langmuir equation, allow comparisons among soils.

¹ Contribution from the Soil Science Lab., Aristotelian Univ., Thessaloniki, Greece.

² Professor of Soil Science, Lecturer and Research Assistant, respectively.

Received for publication July 11, 1983. Accepted for publication August 13, 1984.