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Electrochemistry of Sodium‐Montmorillonite Suspensions: I. Chemical Stability of Montmorillonite
Author(s) -
Shainberg I.,
Low P. F.,
Kafkafi U.
Publication year - 1974
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/sssaj1974.03615995003800050019x
Subject(s) - montmorillonite , conductance , aqueous solution , chemistry , electrochemistry , sodium , bentonite , chemical stability , inorganic chemistry , mineralogy , chemical engineering , mathematics , organic chemistry , electrode , engineering , combinatorics
The chemical stability of four Na‐saturated montmorillonites differing in their isomorphous substitution was studied by following the change of specific conductance, Na + activity and pH of their aqueous suspensions at several clay concentrations. It was found that the change in specific conductance is proportional to the square root of time and that the proportionality constant is linearly related to the degree of octahedral substitution. Further, a linear relation exists between the change in specific conductance and the change in Na + activity. A hypothesis to explain these observations is presented.