Adsorption of ethoxylated alkyl phenols on silica gel from aqueous micellar solutions

Adsorption of ethoxylated nonylphenols (Neonols) from their micellar solutions on coarse-pore KSK silica gel was studied under static conditions. The energy of adsorption interaction between micelles and silica gel surface was determined using the Hill-de Boer isotherm. For the initial parts of the isotherms (from I to 6 CMC1), it was equal to -15.8kT The study of coadsorption of Neonols with dye methylene blue showed that the micellar adsorption layer is fragmentary and that the amount of the adsorbed surfactant is dependent on the conditions of the adsorption layer formation.