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May 17, 2026BUNSEKI KAGAKU0 citationsOpen Access

Development of the Desorption Method of Perfluoroalkyl Carboxylic Acids Absorbed on the Porous Carbon Materials by Using Superheated Water

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KSKodai SHIMAMURATATakuya ASANOち堀ちはる 堀

Key Points

  • This research aims to develop an efficient desorption method for perfluoroalkyl carboxylic acids from porous carbon materials using superheated water.
  • Used high-speed liquid chromatograph for superheated water desorption from porous carbon materials
  • Tested desorption conditions at 150°C and 3 MPa pressure using fiber activated carbon for PFOA recovery
  • Compared efficiency of superheated water desorption with traditional alkaline and vacuum heating methods
  • Achieved desorption efficiencies of TFA at 100% and PFOA at 105% with superheated water method
  • Traditional methods yielded TFA at 93% and PFOA at 64% via alkaline desorption, and TFA at 82% and PFOA at 45% via vacuum heating
  • Superheated water method demonstrated a significantly higher efficiency for PFOA extraction compared to conventional methods

Abstract

高温高圧水用の高速液体クロマトグラフを用いた多孔質炭素材料(PCM)からのペルフルオロアルキルカルボン酸(PFCAs)脱着法を開発した.PCMからのペルフルオロオクタン酸(PFOA)の脱着効率を基に条件を検討したところ,温度を150℃,圧力を3 MPa,PCMを繊維状活性炭とした場合において,PCMに吸着したPFOAを高効率に回収可能であった.また,トリフルオロ酢酸(TFA)とPFOAの脱着効率を既存の脱着法であるアルカリ脱着法及び真空加熱脱着法と比較した.その結果,高温高圧水脱着法によるTFAとPFOAの脱着効率(TFA: 100 %,PFOA: 105 %)は,アルカリ脱着法(TFA: 93 %,PFOA: 64 %)及び真空加熱脱着法(TFA: 82 %,PFOA: 45 %)で得られた脱着効率と比較して,特にPFOAに対して高い値を示した.以上の結果は,高温高圧水を用いることで,PFCAsを吸着したPCMを安全かつ低環境負荷に再活性化できる可能性があることを示唆している.

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Cite This Study

SHIMAMURA et al. (2026) studied this question.

synapsesocial.com/papers/6a095a877880e6d24efe0794https://doi.org/10.2116/bunsekikagaku.75.223
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