Premium
Adsorption of Dodecylbenzene Sulfonate on Na+‐montmorillonite: Effect of Salt Impurities
Author(s) -
Clementz David M.,
Robbins John L.
Publication year - 1976
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/sssaj1976.03615995004000050020x
Subject(s) - dodecylbenzene , adsorption , montmorillonite , sulfonate , salt (chemistry) , pulmonary surfactant , chemistry , langmuir adsorption model , impurity , inorganic chemistry , sorption isotherm , ion exchange , ion , sodium , organic chemistry , biochemistry
The adsorption of purified dodecylbenzene sulfonate (ABS) on Na + ‐montmorillonite follows the Langmuir isotherm, reaching a maximum amount adsorbed which corresponds to the anion exchange capacity of the clay. When a commercial grade ABS (containing 60% Na 2 SO 4 ) is used, the adsorption process is more complex and occurs in two distinct steps. In dilute solutions, the salt impurity has a minor effect on adsorption and the result is essentially the same as that obtained for the purified surfactant. However, as the salt concentration is increased to a given value, enhanced adsorption due to hemimicelle formation occurs.