Premium
THE KINETICS OF HETEROGENEOUS ISOTOPIC EXCHANGE
Author(s) -
PROBERT M. E.,
LARSEN S.
Publication year - 1972
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1972.tb01643.x
Subject(s) - kinetics , exponential function , thermodynamics , recrystallization (geology) , chemistry , tracer , constant (computer programming) , crystallization , mathematics , physics , mathematical analysis , geology , computer science , paleontology , quantum mechanics , nuclear physics , programming language
Summary Isotopic exchange of phosphate ions between soil and solution was examined with particular emphasis on the slower reaction involving the incorporation of the tracer in the solid phase that follows the very fast exchange reaction between the solution and the surface of solid. Experimental data fitted both an equation composed of a sum of exponentials and a much simpler two‐constant equation. The goodness of fit was similar in each case but it was concluded that the exponential type of equation was not useful as a means of elucidating the mechanisms involved. The two‐constant equation may be derived from the kinetics of crystallization and recrystallization processes, and therefore provides an interpretation which is amenable to experimental verification.