Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9456174 | Environmental Pollution | 2005 | 9 Pages |
Abstract
To elucidate the historical changes in polychlorinated dibenzo-p-dioxin (PCDD), polychlorinated dibenzofuran (PCDF), coplanar polychlorinated biphenyl (co-PCB), and polycyclic aromatic hydrocarbon (PAH) inflows in Lake Suwa, their concentrations in the sediment core were analyzed in 5Â cm interval. The maximum concentrations (depth cm) of PCDDs/DFs, co-PCBs, and PAHs were 25.2Â ng/g dry (30-35Â cm), 19.0Â ng/g dry (30-35Â cm), and 738, 795Â ng/g dry (50-55Â cm, 30-35Â cm), respectively. Age and sedimentation rate of the sediment were estimated from the vertical changes in apparent density. Deposition rate of dioxins and PAHs were calculated from the concentration and sedimentation rate of the sediment. The results indicate that large amounts of dioxins and PAHs flowed into the lake in flood stage compared to normal stage.
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Authors
Yoshinori Ikenaka, Heesoo Eun, Eiki Watanabe, Fujio Kumon, Yuichi Miyabara,