東京湾堆積物中のコプロスタノール [in Japanese] Coprostanol in sediments of Tokyo Bay [in Japanese]
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Coprostanol, which has been used as an index of fecal pollution, was determined by gas-liquid chromatography in surface and core sediments of Tokyo Bay. Concentrations of coprostanol in surface sediments were 1-3 μg at the mouth of the river, 0.5-0.8 μg at the center of the bay and 0.02-0.07 μg at the mouth of the bay per 1 g dry sediment. This suggests that coprostanol derived from treatment effluents is easily removed from water at the mouth of the river in contact with seawater. Concentration of coprostanol in core sediment at St-A was 2.1 μg/g at 0-5 cm depth and decreased rapidly with depth. However, maximum concentration (0.96 μg/g) was found in the 10-15 cm level, which was accumulated at about 1970 according to the Pb-210 dating technique. This shows higher load of fecal wastes around 1970.
Chikyukagaku 17(1), 76-81, 1983
The Geochemical Society of Japan