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DESTRUCTION OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFASS) IN AQUEOUS FILM-FORMING FOAM (AFFF) WITH UV-SULFITE PHOTOREDUCTIVE TREATMENT
Tenorio, R., J. Liu, X. Xiao, A. Maizel, C.P. Higgins, C.E. Schaefer, and T.J. Strathmann.
Environmental Science & Technology 54(11):6957-6967(2020)
Ultraviolet (UV) photochemical reaction of sulfite photosensitizer was applied to a diluted aqueous film-forming foam (AFFF) to characterize hydrated electron (eaq-) reactions with 15 PFAS. Reactivity varied widely, but reaction rates observed for individual PFAS in AFFF were like rates observed in single-solute experiments. Long-chain PFSAs and PFCAs were readily degraded while short-chain PFSAs and FTSs were more recalcitrant. Results indicated that while UV-sulfite treatment can effectively treat PFOS and PFOA to meet health advisory levels, remediation of the wider range of PFAS in AFFF will prove more challenging.
Environmental Science & Technology 54(11):6957-6967(2020)
Ultraviolet (UV) photochemical reaction of sulfite photosensitizer was applied to a diluted aqueous film-forming foam (AFFF) to characterize hydrated electron (eaq-) reactions with 15 PFAS. Reactivity varied widely, but reaction rates observed for individual PFAS in AFFF were like rates observed in single-solute experiments. Long-chain PFSAs and PFCAs were readily degraded while short-chain PFSAs and FTSs were more recalcitrant. Results indicated that while UV-sulfite treatment can effectively treat PFOS and PFOA to meet health advisory levels, remediation of the wider range of PFAS in AFFF will prove more challenging.
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