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Effectiveness of One- and Dual-Stage Recycled-Water Systems in Slurry Bioreactor Treatment for Coal Tar-Contaminated Soil  

NamKoong, Wan (Konkuk University Innovative Environmental Technology Center)
Park, Jin-Hong (Korea Testing Laboratory)
Lee, Noh-Sup (Konkuk University Innovative Environmental Technology Center)
Kim, Joung-Dae (Department of Health & Environment, Hallym College)
Park, Joon-Seok (Department of Environmental Engineering, Samcheok National University)
Publication Information
Journal of Environmental Health Sciences / v.31, no.5, 2005 , pp. 423-430 More about this Journal
Abstract
This research was performed to evaluate the effectiveness of one- and dual-stage recycled-water systems in slurry bioreactor treatment for coal tar-contaminated soil. Silty loam soil was used for this research. Coal tar and 14 target PAHs (Polycyclic Aromatic Hydrocarbons) concentration in the soil were determined with gas chromatography. There was no significant difference between removal efficiencies of one- and dual-stage recycled water systems in case of about 4,000 mg coar tar/kg. However, the dual-stage system increased significantly the removal efficiency in case of about 20,000 mg coar tar/kg and the first-order kinetic constant of the system was over 1.5 times higher than that of one-stage recycled water system. 3-Ring compounds in PAHs was removed completely within 30 days of operation. Coar tar was removed in over 96% through biodegradation and removed in about 4% by evaporation. High correlation coefficient($r^2=0.91$) was found between water solubility and removal efficiency of the cyclic compounds.
Keywords
slurry bioreactor; PAHs; coal tar; recycled-water system;
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Times Cited By KSCI : 1  (Citation Analysis)
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