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Concentration and Partitioning of Polycyclic Aromatic Hydrocarbons(PAHs) in the Lake of Sihwa  

Kim, Jong-Guk (Environmental Engineering, Chonbuk National University)
Kim, Hyoung-Seop (Center for Chemical Safety Management, Chonbuk National University)
Kim, Kyoung-Sim (Center for Chemical Safety Management, Chonbuk National University)
Lee, Doung-Soo (Graduate School of Environmental Studies, Seoul National University)
Publication Information
Abstract
The characteristics of hydrospheric concentration and distribution of polycyclic aromatic hydrocarbons (PAHs) in the Lake of Sihwa were investigated on this study. Sediment and Surface water samples were collected from upstream and downstream in Lake of Sihwa. The total PAHs concentrations of surface water were $21.9{\sim}49.6\;ng/L$ at upstream and $19.4{\sim}99.7\;ng/L$ at downstream, respectively. Most of the PAHs existed in the dissolved phase with average 87%. In the case of sediment samples, total PAHs concentrations were $51.7{\sim}325\;ng/g-dry$ at upstream and $13.4{\sim}72.3\;ng/g-dry$ at downstream, respectively. Low-and-middle molecular weight of PAHs were dominated in dissolved phase of the surface water, while middle-and-high molecular weight compounds were predominantly present in the particular phase of the surface water and sediment. The average slope obtained from the plots of log-log scaled dissolved/solid partition coefficient vs. octanol/water partition coefficient was $0.73{\pm}0.12$ and the slope from the water/sediment partition coefficient was $0.59{\pm}0.10$. These results indicated that distribution of PAHs between the dissolved phase and the solid phase was not at equilibrium as well as between water and sediment.
Keywords
Lake of Sihwa; Polycyclic Aromatic Hydrocarbons(PAHs); Dissolved Phase; Solid Phase; Partitioning Coefficient;
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