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The Effect of Exchangeable Cations on Soil Mineral Weathering
Author(s) -
Frenkel H.,
Amrhein C.,
Jurinak J. J.
Publication year - 1983
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1983.03615995004700040008x
Subject(s) - dissolution , weathering , mineral , chemistry , calcareous , cation exchange capacity , kinetics , diffusion , phase (matter) , ion exchange , soil water , mineralogy , environmental chemistry , inorganic chemistry , geology , ion , soil science , geochemistry , thermodynamics , paleontology , physics , organic chemistry , quantum mechanics
The kinetics of dissolution of soil minerals as a function of the ionic composition of the exchange phase were studied using a calcareous soil and a noncalcareous soil. It was concluded that mineral dissolution occurred as a two‐step reaction when an exchanger phase is present. The initial fast reaction was completed in < 1 h and was linearly related to the amount of exchangeable sodium. The second slower reaction was independent of the exchangeable cation but dependent on the total mineral surface (soil‐to‐water ratio) available for weathering. The kinetics of dissolution for the second reaction was diffusion controlled.