Study on Photolysis Pathways of PCBs by UV Irradiation in Alkaline 2-Propanol.

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  • YAO Yuan
    Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology
  • KAKIMOTO Kohji
    Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology
  • OGAWA Hiroaki I.
    Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology
  • KATO Yasuhiko
    Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology
  • BABA Kenzo
    Aqua Research Center, Kitakyushu City Institute of Environmental Sciences
  • HANADA Yoshifumi
    Aqua Research Center, Kitakyushu City Institute of Environmental Sciences
  • SHINOHARA Ryota
    Aqua Research Center, Kitakyushu City Institute of Environmental Sciences
  • YOSHINO Eiichi
    Kawasaki Giken Engineering and Construction Company Limited

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  • 紫外線照射によるアルカリ性２‐プロパノール中のＰＣＢの光分解経路に関する研究
  • シガイセン ショウシャ ニヨル アルカリセイ 2 プロパノールチュウ ノ PC

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Abstract

This study aiming at elucidating the photolysis pathways of PCBs by UV irradiation was designed to explore the photolytic characteristics of several PCBs including 2, 4, 4'-TriCB, 2, 2', 5-TriCB and 2, 2', 5, 5'-TetraCB in alkaline 2-propanol solution and to define their respective photolysis pathways. The results show that the chlorine atom at the ortho- position tends to be released more readily than those at the para- or at the meta- position during photochemical process and that the reductive dechlorination pathways in alkaline alcohol do not alter with the changes in UV wavelength and reaction solvents, whereas the PCB isomers are significantly affected by chlorine substitution position and greatly differ in their rates of photolysis.

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