フェリ磁性体を用いた環境水中のリン及び重金属イオンの磁気分離 Magnetic Separation of Phosphate and Heavy Metal Ions Using Ferrimagnetic Particles for Water Purification

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著者

    • 郷右近 展之 GOKON Nobuyuki
    • 東京工業大学炭素循環素材研究センター Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology
    • 島田 綾乃 SHIMADA Ayano
    • 東京工業大学炭素循環素材研究センター Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology
    • 金子 宏 KANEKO Hiroshi
    • 東京工業大学炭素循環素材研究センター Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology
    • 玉浦 裕 TAMAURA Yutaka
    • 東京工業大学炭素循環素材研究センター Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology
    • 小原 健司 OHARA Takeshi
    • 物質・材料研究機構材料研究所強磁場研究グループ Tsukuba Magnet Laboratory, Materials Engineering Laboratory, National Institute for Materials Science

抄録

To develop a practical environmental protection technology for purification of lakes, ponds and arm of the sea, an efficient magnetic separation system for phosphate and heavy metal ions removal was studied using ferrimagnetic fine particles (FMFP), which can be prepared from Fe<sup>2+</sup> and Fe<sup>3+</sup> ions in the alkali aqueous solution. With the Fe<sup>3+</sup> ions of 15 mg·<i>l</i><sup>-1</sup> (without addition of FMFP), the phosphate ion recovery decreased from 80% to 20% with decreasing the magnetic field from H=8T to 0.8T. By addition of the FMFP of 5 mg·<i>l</i><sup>-1</sup> along with the Fe<sup>3+</sup> ions of 15 mg·<i>l</i><sup>-1</sup>, above 95% recovery was achieved in a wide range of the magnitude of magnetic field (H=0.8-8T). In case of using cadmium ion instead of the phosphate ion, addition of the FMFP of 5 mg·<i>l</i><sup>-1</sup> together with the Fe<sup>3+</sup> ions of 20 mg·<i>l</i><sup>-1</sup> enhanced recovery of the Cd<sup>2+</sup> ion. We demonstrated that in the presence of the FMFP all of the heavy metal ions were recovered 80% yields or more. These would come from a high magnetic gradient characteristically generated on the surface of FMFP, which results in the enhancement of the magnetic coagulation of the complex with the phosphate or the heavy metal ions and the Fe<sup>3+</sup> ions.

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 25(1), 33-38, 2002-01-10

    Japan Society on Water Environment

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各種コード

  • NII論文ID(NAID)
    10008006311
  • 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
    6042328
  • 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  NDL  J-STAGE 
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