Extended Data Fig. 6: Analysis of PFOA-Resin mixed with 2 molar eq of sodium per mole F in PFOA using NaOH, and FJH at 80 V for 1.00 s.
a) XPS shows the high F content in the original PFOA-Resin. b) Fourier-transform infrared spectroscopy (FTIR) of the anion exchange resin with adsorbed PFOA. The C-F stretching vibration can be observed at 1204 and 1148 cm-1. c) Thermal gravimetric analysis-differential scanning calorimetry (TGA-DSC) shows the various stages of weight loss of the resin. The first stage includes PFOA degradation followed by depolymerization of the resin then blackening. d) Reaction vessel after FJH. The sample shatters due to rapid gas formation and expansion. 80 V is the maximum voltage where the solid remains in the inner chamber and can be analyzed. e) XRD analysis of the post-reaction powder shows the presence of NaF. f) Ion chromatography results of the reactions. 66.7% of the PFOA is mineralized into inorganic NaF. The apparatus is a constraint of these samples as the glass tube shatters at high voltages. The data are presented as the mean ± s.d. of the IC results from 3 parallel experiments (n = 3).
