Abstract
The interfacial behavior of sec‐nonylphenoxy acetic acid (CA‐100) at various diluents/(H, Na)Cl interfaces was examined using the Du Nouy ring method. Different adsorption isotherms such as the Gibbs and Szyszkowski were in good agreement with the experimental data. The values of interfacial excess at saturated interface increase in the following order: n‐heptane > kerosene > cyclohexane > CCl4 > toluene > benzene > chloroform. The effects of temperature, acidity, and ionic strength of the aqueous phase on the interfacial activity of CA‐100 were also examined. The interfacial‐activity data were used to discuss the mechanism and kinetics of yttrium (Y) extraction.
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