“永久化学物質”からフッ素を再利用する新手法を開発（Researchers develop innovative new method to recycle fluoride from long-lived ‘forever chemicals’）

2025-03-27 オックスフォード大学

＜関連情報＞

• https://www.ox.ac.uk/news/2025-03-27-researchers-develop-innovative-new-method-recycle-fluoride-long-lived-forever
• https://www.nature.com/articles/s41586-025-08698-5

フッ化物再利用のためのリン酸塩によるメカノケミカルPFAS破壊 Phosphate-enabled mechanochemical PFAS destruction for fluoride reuse

Long Yang,Zijun Chen,Christopher A. Goult,Thomas Schlatzer,Robert S. Paton & Véronique Gouverneur
Nature  Published:26 March 2025
DOI:https://doi.org/10.1038/s41586-025-08698-5

Abstract

Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are persistent, bioaccumulative and anthropogenic pollutants that have attracted the attention of the public and private sectors because of their adverse impact on human health. Although various technologies have been deployed to degrade PFASs with a focus on non-polymeric functionalized compounds (perfluorooctanoic acid and perfluorooctanesulfonic acid), a general PFAS destruction method coupled with fluorine recovery for upcycling is highly desirable. Here we disclose a protocol that converts multiple classes of PFAS, including the fluoroplastics polytetrafluoroethylene and polyvinylidene fluoride, into high-value fluorochemicals. To achieve this, PFASs were reacted with potassium phosphate salts under solvent-free mechanochemical conditions, a mineralization process enabling fluorine recovery as KF and K₂PO₃F for fluorination chemistry. The phosphate salts can be recovered for reuse, implying no detrimental impact on the phosphorus cycle. Therefore, PFASs are not only destructible but can now contribute to a sustainable circular fluorine economy.