ArticleLangmuir : the ACS journal of surfaces and colloids2025
Mechanistic Modeling of Zwitterionic Surfactant Adsorption on Mineral Surfaces: A Three-Step Isotherm with Micelle-Induced Desorption.
Article in Langmuir : the ACS journal of surfaces and colloids, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Most studies on surfactant adsorption onto minerals have primarily relied on simplified isotherm models, which fail to account for the anomalous behavior observed after micelle formation. In this work, we introduce a novel three-step adsorption model that builds upon the classical two-step theory by incorporating a micelle-triggered desorption mechanism. This discontinuous and implicit step, activated at the critical micelle concentration, accounts for surface aggregate desorption induced by micelles, a phenomenon previously unaddressed in adsorption isotherms. The model was validated using experimental data for cocamidopropyl betaine adsorbing on both sandstone and limestone. The added mechanism is grounded in electrical double layer properties obtained via a Surface Complexation Model (SCM). It was found that surfactant adsorption is more favored in sandstone (2.15 mg/m
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