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Phenanthrene Uptake by Surfactant Sorbed on Activated Carbon  

Ahn, Chi-Kyu (School of Environmental Science and Engineering/Advanced Environmental Biotechnology Research Center, POSTECH)
Woo, Seung-Han (Department of Chemical Engineering, Hanbat National University)
Park, Jong-Moon (School of Environmental Science and Engineering/Department of Chemical Engineering/Advanced Environmental Biotechnology Research Center, POSTECH)
Publication Information
Journal of Soil and Groundwater Environment / v.13, no.2, 2008 , pp. 1-11 More about this Journal
Abstract
Phenanthrene uptake by surfactant sorbed on activated carbon was investigated to recycle of surfactant in washed solution for contaminated soil. The partitioning of phenanthrene to the activated carbon coating with Triton X-100 as a surfactant was also evaluated by a mathematical model. Phenanthrene-contaminated soil (200 mg/kg) was washed in 10 g/L of surfactant solution. Washed phenanthrene in solution was separated by various particle loadings of granular activated carbon through a mode of selective adsorption. Removal of phenanthrene was 99.3%, and surfactant recovery was 88.9% by 2.5 g/L of granular activated carbon, respectively. Phenanthrene uptake by activated carbon was greater than that of phenanthrene calculated by a standard model for a system with one partitioning component. This is accounted for enhanced surface solubilization by hemi-micelles adsorbed onto granular activated carbon. The effectiveness factor is greater than 1 and molar ratio of solubilization to sorbed surfactant is higher than that of liquid surfactant. Results suggest that separation of contaminants and surfactants by activated carbon through washing process in soil is much effective than that of calculated in a theoretical model.
Keywords
Activated carbon; Modeling; Soil washing; Surfactant recycle; Surface solubilization;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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