Overview
- Researchers at Helmholtz‑Zentrum Dresden‑Rossendorf and analytical teams at UFZ confirmed July 20, 2026, that hydrodynamic cavitation and gas‑dispersed cold atmospheric plasma can break PFAS molecules and free some fluorine as fluoride.
- Hydrodynamic cavitation forces water through a constriction to form tiny vapor bubbles that collapse with extreme heat and reactive radicals, and laboratory tap‑water tests broke down about 37 percent of dissolved PFOS.
- Gas‑dispersed cold atmospheric plasma concentrates PFAS on rising gas bubbles and exposes them to a reactive plasma field, producing near‑total molecular destruction in tests but only about 35 percent measured defluorination and some gaseous transformation products.
- The teams are scaling experiments from 50 millilitres to 5 litres and aim to combine the fast plasma chemistry with cavitation’s extreme local conditions to boost degradation above 80 percent and raise total defluorination toward the 50 percent target.
- Key uncertainties remain: plasma produces uncharacterised gaseous byproducts and uses more energy per volume, so researchers are now analysing byproduct identity and toxicity and measuring energy costs before larger‑scale deployment to treat municipal and industrial wastewater.