The adsorption of surfactants on soil

In this paper, the adsorption of anionic surfactant and non-ionic surfactant on soil has been studied. It is found that the equilibrium of surfactants between soil and water is very fast, adsorption isotherms are linear when the concentration of surfactants was close to or higher than the critical mecelle concentration, adsorption isotherms appear linear the temperature has different effect on adsorption for these two kinds of surfactant: adsorption of anionic surfactant would be decreased with increasing temperature, however, the adsorption of non-ionic surfactant will going up with the temperature is raised. As for the influences of salinity and ionic strength of solution upon the anionic surfactant adsorption were not significant. The experimental results provide reference for the application of the surfactant-enhanced remediation technology.