都市汚濁河川における重金属の存在と挙動 : I.河川底泥中の重金属分布
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概要
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Sediment samples were collected from 44 locations of a typical polluted urban river, the Sumida (Shingashi) River, which runs through the Tokyo area and pours into the Tokyo Bay, Japan. Fine particles under 76 μm diameter were sieved and analyzed for concentrations of Cr, Ni, Cu, Zn, Cd, Pb, organic carbon and nitrogen. The analytical results showed that most of the samples from upstream to downstream of the river were heavily polluted with those metals probably originated from waste waters of urban activities in the drainage area. The characteristics in the metal compositions and their distributions were examined by calculating the concentration correlation matrices and the correlations between elements. It was found that the heavy metal composition except Ni was nearly uniform among the majority of the samples from mid- to downstream of the river. The reference sediment samples from 22 and 6 locations near the river mouths of Tama-gawa and Ara-kawa, respectively, which run adjacent to the Sumida River, were analyzed in the same way. It appeared that there are some specific heavy metal compositions, probably reflecting the degree and quality of pllution to each river.
- 日本地球化学会の論文
- 1985-10-15
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