Degradation of Perfluorooctansulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) by Mechanochemical Treatment

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  • Shintani Masayuki
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Naito Yuta
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Yamada Shingo
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Nomura Yugo
    Japan Quality Assurance Organization
  • Zhou Sheng
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Nakashimada Yutaka
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology
  • Hosomi Masaaki
    Department of Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology

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Other Title
  • メカノケミカル法によるペルフルオロオクタンスルホン酸（ＰＦＯＳ）およびペルフルオロオクタン酸（ＰＦＯＡ）の分解
  • メカノケミカルホウ ニ ヨル ペルフルオロオクタンスルホンサン PFOS オヨビ ペルフルオロオクタンサン PFOA ノ ブンカイ

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Perfluorooctansulfonate (PFOS) and perfluorooctanoic acid (PFOA), which case concern as persistent organic pollutant compounds, were treated with calcium oxide by a mechanochemical (MC) process. PFOS and PFOA were degraded during MC treatment by the cleavage of C–C and C–F bonds in their molecules, resulting in the formation of calcium carbonate (CaCO3) and calcium fluoride (CaF2) as degradation products. The MC treatment of PFOS/PFOA makes it possible to recover a valuable material such as CaF2. It was found that PFOS had poor degradability in comparison with PFOA because of the difference in physical properties.

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