東京湾におけるフッ素系界面活性剤の環境挙動 Environmental Behavior of Perfluorinated Surfactants in Tokyo Bay

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著者

    • 小高 良介 ODAKA Ryosuke
    • 国立大学法人横浜国立大学大学院環境情報学府 Graduate School of Environmental and Information Sciences, Yokohama National University
    • 益永 茂樹 MASUNAGA Shigeki
    • 国立大学法人横浜国立大学大学院環境情報研究院 Graduate School of Environmental and Information Sciences, Yokohama National University

抄録

The perfluorinated surfactants, perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) have been reported to be present in the environment. Their behaviors in the environmental, however, are still unknown. In this study, we measured their concentrations in seawater and sediment from Tokyo Bay and in the waters of six major rivers that run into the bay. Then, their mass balances and behaviors in the bay were estimated. PFOS and PFOA existed mainly in the dissolved phase in water. The estimated annual input of PFOS from the rivers was 74 ∼ 346 kg · year<sup>-1</sup>, which was similar to the total amount of PFOS outflow to the ocean (20 ∼ 350 kg · year<sup>-1</sup>) and the amount of PFOS sedimentation to the bottom of the bay (1.3 kg · year<sup>-1</sup>). On the other hand, the estimated annual input of PFOA from the rivers was 29 ∼ 148 kg · year<sup>-1</sup>, which was much smaller than the total amount of PFOA outflow to the ocean (140 ∼ 1900 kg · year<sup>-1</sup>). The amount of PFOA sedimentation was estimated to be negligible. These results suggest that the major source of PFOS in the bay is riverine transport. The results also indicate the existence of unknown PFOA sources around the coast of the bay and/or the possibility of a significant PFOA atmospheric deposition to the bay. The sediment was not a significant sink for the two compounds. Their environmental behaviors, therefore, are quite different from those of persistent organochlorine compounds.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment  

    水環境学会誌 = Journal of Japan Society on Water Environment 29(4), 221-228, 2006-04-10 

    Japan Society on Water Environment

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各種コード

  • NII論文ID(NAID)
    10018109944
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    7923642
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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