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Photodegradation and Photocatalysis of Per- and Polyfluoroalkyl Substances (PFAS): A Review of Recent Progress
Citation:
Verma, S., B. Mezgebe, C. Hejase, E. Sahle-Demessie, AND M. Nadagouda. Photodegradation and Photocatalysis of Per- and Polyfluoroalkyl Substances (PFAS): A Review of Recent Progress. Next Materials. Elsevier B.V., Amsterdam, Netherlands, 2:100077, (2024). https://doi.org/10.1016/j.nxmate.2023.100077
Impact/Purpose:
This review is intended to provide researchers in this field a better understanding of recent advances and stimulate further discussions on the photolysis of perfluorinated compounds as viable treatment technologies.
Description:
Poly- and perfluoroalkyl substances (PFAS) are oxidatively recalcitrant organic synthetic compounds. PFAS are an exceptional group of chemicals that have significant physical characteristics due to the presence of electronegative fluorine. PFAS persists in the environment, bioaccumulate, and have shown to be toxic. PFAS, mainly, perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS) have been ubiquitous in the biosphere, hydrosphere, and the atmosphere. Therefore, PFAS are highly ecologically distressed compounds and need to be completely eliminated from the environment. Various separation technologies such as adsorption with activated carbon or ion exchange resin, nanofiltration, reverse osmosis, and destruction methods, including sonolysis, thermally-induced reduction, and photocatalytic dissociation, have been tested to remove PFAS from drinking water supplies. In this review, we will comprehensively summarize previous reports on photocatalytic degradation of PFAS, including via direct and indirect approaches. Additionally, the photocatalytic defluorination mechanism of PFOA and PFOS following complete mineralization have also been discussed in detail.
URLs/Downloads:
DOI: Photodegradation and Photocatalysis of Per- and Polyfluoroalkyl Substances (PFAS): A Review of Recent Progress