Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) have attracted attention due to their widespread distribution, recalcitrance, and substantial toxicity. In this work, high concentrations of PFOA and PFOS were degraded and mobilized through electrochemical treatments in a simulated source zone of saturated soil. Under a low constant voltage and direct current of 24 V and 467–690 mA, approximately 51.7% and 33% of PFOA and PFOS were degraded, respectively. Additionally, a total defluorination mass balance of 44.7% and 23% were detected for PFOA and PFOS, respectively, which indicates that the removal of PFOA and PFOS occurs through its destruction. Substantial electromigration causes the destruction and mobilization of solid PFOA and PFOS to shift into the water phase. Although electrochemical oxidation of PFAS (per- and polyfluoroalkyl substances) were previously reported and studied, this study is one of the few that focus on simultaneous desorption, mobilization, and destruction of PFAS in saturated soil containing a low-intensity electrical field.

全氟辛酸 (PFOA) 和全氟辛烷磺酸 (PFOS) 因其分布广泛、顽固性和毒性大而备受关注。在这项工作中，高浓度的 PFOA 和 PFOS 通过电化学处理在饱和土壤的模拟源区中降解和动员。在 24 V 和 467-690 mA 的低恒压和直流电流下，PFOA 和 PFOS 的降解率分别约为 51.7% 和 33%。此外，检测到 PFOA 和 PFOS 的总脱氟质量平衡分别为 44.7% 和 23%，这表明 PFOA 和 PFOS 的去除是通过其破坏进行的。大量的电迁移导致固体全氟辛酸和全氟辛烷磺酸的破坏和迁移，转变为水相。