Continuous Flow Hydrothermal Alkaline Treatment of PFOS

I. Novosselov
The University of Washington, Washington, United States

Poster stand number: W113

Keywords: PFAS, Hydrothermal treatment

Per- and poly-fluoroalkyl substances (PFAS) is an environmentally persistent contaminant, and their treatment has become a global environmental challenge. We demonstrate the degradation and mineralization of PFAS in the continuous flow hydrothermal alkaline system. The influences of NaOH concentration, surface area to volume ratio (S/V) of the reactor, reactor material, and residence time on the degradation of PFOS were studied. Among the four key factors, the concentration of NaOH has the most significant effect on the treatment of PFOS. The S/V of the reactor and residence time also have a positive influence, 99.9944% of PFOS were removed in the high S/V reactor with 5 M NaOH. The reactor material had a only slight effect on destruction efficiencies.