LAUSR

The sorption isotherms of anionic surfactants (AS) from the aqueous solution on eight polar and nonpolar sorbents were obtained. The equilibrium characteristics of sorption were determined. The SV-50 activated carbon is recommended for the effective recovery of AS based on the values of maximum adsorption and concentration equilibrium constants. It has been established that, when the content of AS is much higher than the maximum permissible concentrations, adsorption proceeds via a monomolecular mechanism, and the onset of multilayer formation corresponds to half of the critical micelle concentration. A sorbent layer consisting of activated carbon SV-50 and ion exchange fiber FIBAN AK-22-1 is proposed for the concentration of AS from aqueous solutions. 0.1 M Solution of sodium sulfate is selected as a solution for elution. The concentration was carried out using sodium dodecyl sulfate as an example. An elution curve was obtained, and the characteristics of the concentration were calculated for AS. The proposed sorption extraction allows to reduce the detection limit of AS for the determination by ion-selective electrodes.