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Exchange Adsorption of Trace Quantities of Cadmium in Soils Treated with Calcium and Sodium: A Reappraisal
Author(s) -
Milberg R. P.,
Brower D. L.,
Lagerwerff J. V.
Publication year - 1978
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/sssaj1978.03615995004200060011x
Subject(s) - cadmium , chemistry , soil water , adsorption , cation exchange capacity , organic matter , dispersion (optics) , sodium , ion exchange , environmental chemistry , selectivity , inorganic chemistry , calcium , soil science , organic chemistry , geology , ion , catalysis , physics , optics
Cadmium was selectively adsorbed over Ca in Cecil, Winsum, and Yolo soils with up to 1.7% of the total cation exchange capacity occupied by Cd. Selectivity was greatest in Yolo and least in Cecil. Effects of undissociated Cd in solution were minor. Separation factors ( K s ) decreased with increasing exchangeable Cd. Reexamination of Cd‐Na exchange revealed that anomalous earlier results were due to the dispersion of organic matter during treatment with Na 2 CO 3 in the preparation of Na‐saturated soils. Na‐Cd exchange was normal where organic matter loss was prevented.