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Adsorption of petroleum sulfonate TRS 10‐80 on a mineral sand
Author(s) -
Singh Vimal Sheel,
Pandey Birendra Prasad
Publication year - 1987
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280370106
Subject(s) - sulfonate , adsorption , pulmonary surfactant , chemistry , inorganic chemistry , freundlich equation , salt (chemistry) , electrolyte , micelle , mineral , sodium , organic chemistry , aqueous solution , biochemistry , electrode
Abstract Adsorption of petroleum sulfonate TRS 10‐80 on a mineral sand, characterized by chemical analysis and infrared spectra to be silica, has been studied under conditions relevant to the practical field. The adsorption is significantly affected by the age of the sulfonate solutions. A new mechanism of adsorption involving sulfonate monomers and multimers has been proposed. The adsorption behavior is best characterized by Langmuir and Freundlich models. At higher temperatures, the mineral surface seems to be capable of forming chemical bonds with the sulfonate anions. Micelles are not considered to be the species favored for adsorption. The adsorption, depending upon the concentration of added electrolyte, either reaches a saturation value or decreases abruptly after a fixed surfactant concentration has been reached. The apparent surfactant loss at higher salt concentrations seems to be due to salting‐out of the sulfonate rather than its adsorption.