表面活性剂在土壤颗粒物上的吸附行为

The adsorption of surfactants on soil

对两种阴离子表面活性剂和两种非高子表面活性剂在土壤中的吸附行为进行了初步研究．结果表明．表面活性剂在土壤／水体系中的吸附过程很快．表面活性剂浓度接近或大于临界胶团浓度后，吸附等温线为线性．温度升高会降低阴离子表面活性剂的吸附而增加非离子表面活性剂的吸附．盐度对非离子表面活性剂吸附的影响不显著，但可略微增加阴离子表面活性剂的吸附量．实验结果对表面活性剂增效修复技术的应用有一定参考价值．

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.