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Charge Characteristics of Soils with Variable and Permanent Charge Minerals: II. Experimental
Author(s) -
Gillman G. P.,
Uehara G.
Publication year - 1980
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/sssaj1980.03615995004400020009x
Subject(s) - oxisol , potentiometric titration , surface charge , charge (physics) , adsorption , soil water , chemistry , point of zero charge , podzol , ion , mineralogy , soil science , geology , physics , organic chemistry , quantum mechanics
Potentiometric titration and ion adsorption data were analyzed according to theory which treats soils as mixtures of permanent and variable charge minerals. Evidence of permanent positive charge was found in a Spodosol and two Oxisols. Surface areas calculated from negative ion adsorption below and above the zero point of charge indicates that permanent and variable charges occupy the same area. Laboratory procedure for characterizing samples with mixed charges are described.