REMEDIATION OF DIESEL CONTAMINATED SOIL BY THERMAL DESORPTION AND SOIL WASHING
Desorption of diesel molecules from sand was investigated by thermal desorption. Reaction rate constants were found as k=0.0723 min-1, k=0.1969 min-1 and k=0.8525 min-1 at 100℃, 200℃ and 400℃, respectively. Using Arrhenius equation, the activation energy for desorption was found as 17.20 Kjmole-1. In this study, dose effect of anionic surfactant sodium dodecyle sulfate surfactant and that of salinity effect were also investigated on soil washing. Removal efficiency increased with increasing surfactant dose. 1％, 3％ and 5％ of NaCl were used with 4％ of surfactant concentration in soil washing. Maximum enhancement was observed at 5％ salinity, indicating surfactant-enhanced remediation (SER) efficiency in saline water was higher than that in freshwater. This research can be an implication on designing an integrated type of soil washing and thermal desorption equipment. In addition, calculation of activation energy makes it possible to provide optimal temperature on thermal desorption and the intuition for remediating the soil contaminated with persistent organic pollutants.
Mannan M Choi K Lee W
Department of Civil and Environmental Engineering,Korea Advanced Institute of Science and Technology,373-1 Guseong-Dong,Yuseong-Gu,Daejeon 305-701,Korea
国际会议
北京
英文
1-4
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）