Using BN as a typical piezoelectric material, we demonstrated that piezoelectric BM achieved complete defluorination of PFOS and PFOA. Further, we demonstrated that the BN-BM process outperformed BM using KOH, as evidenced by the faster PFAS destruction kinetics and higher DeF. Quartz sand (SiO2) has also been demonstrated to have reactivity in removing PFAS, although < 20% defluorination efficiency was observed for PFOS and PFOA. the possibility that unextractable or unknown fluorocarbon residues were also formed but were below the instrument detection limit or not detected using traditional analyses.