Premium
Ionic Relationships in Clay Suspensions and Dialyzates: I. Rubidium‐86 as a Tracer for Potassium
Author(s) -
Franklin R. E.,
Snyder G. H.
Publication year - 1965
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/sssaj1965.03615995002900050012x
Subject(s) - vermiculite , rubidium , kaolinite , chemistry , illite , tracer , potassium , clay minerals , bentonite , electrolyte , saturation (graph theory) , mineralogy , inorganic chemistry , analytical chemistry (journal) , environmental chemistry , geology , mathematics , paleontology , physics , organic chemistry , electrode , combinatorics , nuclear physics
Abstract Highly significant linear correlations were found to exist between radiotracer quantities of Rb 86 and the K concentrations of the dialyzate phases of clay‐water membrane equilibrium systems. The systems extended over a wide range of Ca/K saturation ratios, electrolyte concentrations, and pH values. The linear regression lines for bentonite, illite, kaolinite, and vermiculite systems had similar slopes. The actual amounts of K in the dialyzate phases were about 1.4 times the values indicated by the Rb tracer. Of the four clay minerals only the vermiculite presented problems because of specific fixation of K or Rb. Uptake of K 42 by excised barley, corn, and soybean roots from bentonite systems was also significantly correlated with uptake of Rb 86 . It appeared that Rb 86 could be used in tracer quantities to reflect relative changes in the K distribution in these systems.