東京都府中市における大気降下物中のフッ化物イオン Fluoride in atmospheric deposition at Fuchu, Tokyo

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著者

    • 高 春心 KO Chun-Sim
    • 東京農工大学大学院連合農学研究科 The United Graduate School, Tokyo University of Agriculture and Technology
    • 小倉 紀雄 OGURA Norio
    • 東京農工大学農学部環境資源科学科 Faculty of Agriculture, Tokyo University of Agriculture and Technology

抄録

The atmospheric deposition of fluoride (F<sup>-</sup>) was observed at Fuchu, in a Tokyo suburb, from February 1992 through November 1994. Dry and wet depositions of F<sup>-</sup> were in the range of 8.6-57 and 9.9-214 μg m<sup>-2</sup>day<sup>-1</sup>, with the weighted mean values of 26 and 76 μg m<sup>-2</sup>day<sup>-1</sup>, respectively. Weighted mean value for total (dry + wet) deposition of F<sup>-</sup> was 102 μg m<sup>-2</sup>day<sup>-1</sup>. Dry fall-out amounted to 27% of the total F^- deposition, which was in the same range as other observed elements derived from soils. However, chemical analysis indicated neither soil particles nor sea salt to be a major source of F<sup>-</sup> deposition. This result suggests contributions other than these two; probably a fossil fuel combustion source. In the case of dry deposition, an increase in F<sup>-</sup> deposition during the spring period resulted in higher F<sup>-</sup>/nss-SO<sub>4</sub><sup>2-</sup> (nss = non sea salt) than that for the remainder of the time. Such periodical changes in F<sup>-</sup>/nss-SO<sub>4</sub><sup>2-</sup> was not obtained with wet deposition, because the wet depositions of F<sup>-</sup> and nss-SO<sub>4</sub><sup>2-</sup> depended largely on the amount of rainfall. A stationary source emitting fluoride to atmosphere was not observed near the sampling site. Therefore, transportation of suspended particles rich in fluoride was suggested as a possible mechanism to increase the F<sup>-</sup>/nss-SO<sub>4</sub><sup>2-</sup> of dry deposition in the spring.

収録刊行物

  • 地球化学

    地球化学 29(2), 67-74, 1995

    一般社団法人日本地球化学会

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各種コード

  • NII論文ID(NAID)
    110008679901
  • NII書誌ID(NCID)
    AN00141280
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    0386-4073
  • NDL 記事登録ID
    3916116
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-645
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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