Forever no more: Complete mineralization of per- and polyfluoroalkyl substances (PFAS) using an optimized UV/sulfite/iodide system

The role of helicity in PFAS resistance to degradation: DFT simulation of electron capture and defluorination

“…One set of techniques for the degradation of dilute PFAS in water is via the capture of hydrated electrons, e aq À . The sources of electrons vary and include the use of electrodes, 25 plasmas, [26][27][28][29] photochemical interactions with electron donors, [30][31][32][33] or radiolysis of the water. [34][35][36] As a recent review comprehensively covers, theoretical studies to elucidate the defluorination mechanisms complement the experimental work although identification of the elementary steps on the reaction pathway remains as recalcitrant as the molecules themselves.…”

“…One set of techniques for the degradation of dilute PFAS in water is via the capture of hydrated electrons, e aq − . The sources of electrons vary and include the use of electrodes, 25 plasmas, 26–29 photochemical interactions with electron donors, 30–33 or radiolysis of the water. 34–36…”

Efficient Decomposition of Perfluoroalkyl Substances by Low Concentration Indole: New Insights into the Molecular Mechanisms

“…Similar results were obtained in the UV/SO 3 2– system, especially for pH > 12, as high pH conditions favored the decarboxylation pathway toward deeper defluorination . A recent study combined both UV/I – and UV/SO 3 2– systems, in which the PFAS decomposition rate was significantly promoted. , In the mixture, the addition of SO 3 2– could quench the generated I 3 – , further increasing the yield of hydrated electrons. On the other hand, in the UV/3-indole acetic acid (3-IAA) and UV/HPAs systems, the confined space constructed by organic montmorillonite and self-assembly micelles was developed, , which not only prevented the quenching of hydrated electrons by oxygen and protons but also accelerated the transfer of hydrated electrons generated from 3-IAA/HPAs to PFAS.…”