野川上流域における河川水中の微量重金属濃度と挙動  [in Japanese] Concentrations and behavior of heavy metals in the water of the upper course of the Nogawa River  [in Japanese]

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Author(s)

    • 欧陽 通 OUYANG Tong
    • 東京農工大学農学部環境資源学科土壌水界環境学研究室|(現)環境管理センター(株)環境基礎研究所 Laboratory of Science of Soil and Aquatic Environment, Department of Environment & Resources, Faculty of Agriculture, Tokyo University of Agriculture & Technology|(Present address) The Institute of Basic Environmental Research, Environmental Control Center, Ltd.
    • 岡崎 正規 OKAZAKI Masanori
    • 東京農工大学農学部環境資源学科土壌水界環境学研究室 Laboratory of Science of Soil and Aquatic Environment, Department of Environment & Resources, Faculty of Agriculture, Tokyo University of Agriculture & Technology
    • 小倉 紀雄 OGURA Norio
    • 東京農工大学農学部環境資源学科土壌水界環境学研究室 Laboratory of Science of Soil and Aquatic Environment, Department of Environment & Resources, Faculty of Agriculture, Tokyo University of Agriculture & Technology

Abstract

During June 1990-December 1991, water samples of the Nogawa River were monthly taken and analyzed for six heavy metallic elements. Concentration of the dissolved heavy metals in the upperstream of the Nogawa River were at the trace levels as: 0.2-8.8μg L<sup>-1</sup> for Cu, O.8-17μg L<sup>-1</sup> for Zn, 21-513ng L<sup>-1</sup> for Pb, 0.2-25ng L<sup>-1</sup> for Cd, 6-271 μg L<sup>-1</sup> for Fe and 3-45μg L<sup>-1</sup> for Mn. However, higher values, especially in the from of total metals (dissolved + particulate), were generally observed in downstream of the river. The removal of dissolved metals by particles during metal transportation in the river and subsequent deposition to the sediment, can explain the decrease in dis- solved metal concentration when the river flows on the gravel and sandy river bed. Significant correlations among flux of heavy metals, especially metals in particulate phase, water flux (Q) and flux of suspended solids (SS) were identified. It is considered that resuspended bottom sediments should predominantly contributed to the increase in flux of heavy metals at rising river stage in dry days.

Journal

  • Chikyukagaku

    Chikyukagaku 28(1), 37-46, 1994

    The Geochemical Society of Japan

Codes

  • NII Article ID (NAID)
    110008679887
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • ISSN
    0386-4073
  • NDL Article ID
    3875615
  • NDL Source Classification
    ME34(水文学--陸水)
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    NDL  NII-ELS  J-STAGE 
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