In this study, PFAS chemicals or undiluted AFFF (discussed later) were added to 100 mL stainless steel jars filled with SS balls (16 Ø1.0 cm large balls and 100 Ø0.6 cm small balls; 160 g in total) and co-milling reagents (0.4-6.0 g; details disclosed below). The planetary disk and jars were rotated at 290 and 580 rpm, respectively. All BM treatment tests were conducted at room temperature and atmospheric pressure. showed that the addition of SiO2 did not promote PFAS destruction, suggesting that BN-mediated destruction is the dominant mechanism in [BN+SiO2]-BM treatment.