光触媒, オゾンあるいは過酸化水素によるCN^-イオン含有水溶液の分解 Decomposition of Aqueous Cyanide Ions by Photocatalytic, Ozone and/or Hydrogen Peroxide Oxidation Routes

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著者

    • 佐貫 須美子 SANUKI Sumiko
    • 富山大学工学部 物質生命システム工学科 Assistant professor, Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University
    • 山本 拓矢 YAMAMOTO Takuya
    • 富山大学大学院理工学研究科 物質生命システム工学専攻 Assistant professor, Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University
    • 持舘 正輝 MOTTATE Masateru
    • 富山大学大学院理工学研究科 物質生命システム工学専攻 Assistant professor, Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University

抄録

Decomposition reactions of aqueous CN<SUP>-</SUP> ions by TiO<SUB>2</SUB> photocatalyst, ozone and/or hydrogen peroxide were investigated. The principal findings obtained are as follows:<BR>1) The presence of dissolved oxygen was necessary to decompose aqueous CN<SUP>-</SUP> ions photocatalytically. CN<SUP>-</SUP> was oxidized to CNO<SUP>-</SUP> with TiO<SUB>2</SUB> catalyst, and then to CO<SUB>3</SUB><SUP>2-</SUP> and NO<SUB>3</SUB><SUP>-</SUP>. Oxidation reaction of CNO<SUP>-</SUP> to CO<SUB>3</SUB><SUP>2-</SUP> and NO<SUB>3</SUB><SUP>-</SUP> was far slower compared to that of CN<SUP>-</SUP> to CNO<SUP>-</SUP>. Photocatalytic oxidation reaction of CNO<SUP>-</SUP> at pHs 7 and 10 proceeded distinctly faster compared to that at pH 12. <BR>2) Although ozone oxidation of CN<SUP>-</SUP> took the same paths as photocatalytic reactions, but it was faster than that of photocatalytic routes. Combined use of photocatalyst and ozone for the decomposition of CN<SUP>-</SUP> was more efficient.<BR>3) Decomposition product of CN<SUP>-</SUP> with hydrogen peroxide was found as CNO<SUP>-</SUP> and N<SUB>2</SUB>. Joint use of hydrogen peroxide and photocatalyst promoted reaction of CN<SUP>-</SUP> to N<SUB>2</SUB>.

収録刊行物

  • 資源と素材 : 資源・素材学会誌  

    資源と素材 : 資源・素材学会誌 122(10), 489-496, 2006-11-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10018402089
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    8596091
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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