Behavior of Contaminant Elements in Sediment, Suspended Solid and Running Water of The Watarase River.

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  • 渡良瀬川水系における底質,懸濁物質および河川水中における重金属等の汚染元素の挙動
  • ワタラセガワ スイケイ ニ オケル テイシツ ケンダク ブッシツ オヨビ カセ

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Abstract

Behavior of contaminant elements, copper, zinc, cadmium and arsenic were traced in sediments, suspended solid and running river water of the Watarase river through 1992 .and 1994 to inform about the state of heavy metal pollution . Surface soils covered on slope surrounding the smelting work contains high level of copper and other elements and rushed into the stream after heavy rain. The running river water collected close to the Ashio bridge which is just nearby the smelter showed almost normal concentration of dissolved elements, but increase in the concentration of suspended elements was found in the same samples. The river water from the lower leach which accepted small stream from the mining waste ponds showed the three highest peaks at the Kamimatoh, twhich accepted small stream from the mining waste ponds showed the three highest peaks at the Kamimatoh, the Hara bridge, and the Mikuni bridge in their levels of the elements. Heavy contamination was detected on the flooding as to the suspended copper and arsenate.

Journal

  • ENVIRONMENTAL SCIENCE

    ENVIRONMENTAL SCIENCE 9 (3), 357-368, 1996

    SOCIETY OF ENVIRONMENTAL SCIENCE, JAPAN

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