| Summary: | 碩士 === 國立屏東科技大學 === 環境工程與科學系 === 87 === This study evaluate the sorption of organic pollutants onto surfactant-modified soils. The results can be applied to the remediation of contaminated soil and groundwater system. Benzene, toluene, ethyl-benzene and o-xylene ( BTEX ) were selected as the index compounds in this research. DPC and TX-100 were used to represent the cationic and nonionic surfactant.
The results of the experiment show that the amount of cationic surfactant (DPC) sorbed on the soils is proportional to the CEC value of the soils .On the other hand, the amount of nonionic surfactant (TX-100) sorbed on the soils is affected by the organic content of the soil . The sorption of surfactant reached equilibrium in less than 2 hours , whereas the desorption took about 16 hours. In addition , the amount of BTEX sorbed to the soils are related to their solubility .The presence of surfactant admicelle strongly increased soil sorption capacity of benzene. The soil containing TX-100 admicelle can sorb about 0.1-2.0mg of benzene per mg of surfactant , which is about 10 times of those containing DPC admicelle.
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