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Effect of cations on the maximum yield values of a bentonite clay gel
Author(s) -
Hu C.S.,
Pinder K. L.
Publication year - 1974
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450520501
Subject(s) - bentonite , chemistry , sodium , valence (chemistry) , salt (chemistry) , ion , yield (engineering) , inorganic chemistry , ionic strength , clay minerals , calcium , ion exchange , mineralogy , nuclear chemistry , chemical engineering , materials science , aqueous solution , metallurgy , organic chemistry , engineering
The effect of cations on the gel strength of a bentonite clay was studied by measuring the maximum yield value of clay salt mixtures. Cations which are in large concentration as exchanged ions on the clay act very differently upon the clay strength than do cations which are only in trace concentrations in the clay. For those cations which were originally in only trace concentrations, the ability to build up the gel strength is inversely proportional to their valence. Sodium and calcium ions reacted completely differently. The clay was tolerant to a large sodium concentration but lost gel strength with the addition of only a small amount of calcium. This result is explained in the light of previously reported ion exchange properties of clay.