In this study a nonionic surfactant, Triton X-100 was used to study the sorption characteristics of organic contents in soil. The surface tension is used for calculating this kind of sorption. The results indicated that when the concentration of surfactant was lower than the CMC, the amount of surfactant sorbed on soil increased with the increasing surfactant concentration and the surfactant sorption characteristics of the uncontaminated soil could be modeled by the Freundlich isotherm. For the contaminated soils, the amount of surfactant sorbed was higher than those for the uncontaminated soils.

Capsule:  Relation between CMC, and surfactant sorbed on soil.

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