The second strategy to promote treatment capacity is to reduce Z0 by pre-evaporating the solvents in AFFF before BM treatment. As shown in Figure , the BN-BM treatment of 200 μL AFFF for 2 h led to a negligible DeF. We found that preheating the jar (lid opened) at 60 °C for 6 h followed by a 2 h BN-BM treatment achieved > 90% DeF (Figure ) and > 94% of target PFAS destruction (Figure ). The results of these two treatment scenarios with and without preevaporation can be explained by the CLFT theory: The heat effects of 2 h BM treatment can only reduce the Z value from 7.5 to 6.7 μm, which is still larger than CLFT. Thus, the PFAS destruction did not proceed effectively. However, including 6 h pre-evaporation (solvents released to air) followed by 2 h BM treatment (solvents vaporized in the jar) provided an 8 h heat-induced solvent loss. These approaches reduced the Z to 1.9 μm (< CLFT of 2.3 μm). Thus, a high DeF can be expected for the latter scenario.