While per- and polyfluoroalkyl substances (PFAS) are recalcitrant to chemical reactions traditionally used in water treatment, we report the novel finding that combining ultraviolet (UV, 254 nm) light and chlorine can promote perfluorooctanoic acid (PFOA) degradation.

2015年12月21日 · In this study, we investigated the destruction and by-product formation of perfluorooctanoic acid (PFOA) using ultraviolet light and persulfate (UV–PS). Additionally, we developed a first-principles kinetic model to simulate both PFOA destruction and by-product and chlorate (ClO 3 – ) formation in ultrapure water (UW), surface water (SW ...

2023年6月10日 · Developing low-cost, green-chemical and highly efficient treatment approaches is significant for treating PFOA caused environmental issues. Herein, we propose a feasible PFOA degradation strategy under UV irradiation by adding Fe (III)-saturated montmorillonite (Fe-MMT), and the Fe-MMT could be regenerated after reaction.

2022年11月5日 · PFOA-containing desorption solution could be directly degraded under UV irradiation. Herein, we developed a novel hydrated electron induced approach by simply adding alcohols (0.2 %~0.5 %) as catalysts to enhance the decomposition of …

2024年1月1日 · Especially, UV/sulfite reaction recently has been studied to remove PFOA from water (Gu et al., 2017b). They demonstrated the degradation, defluorination, and suggested a pathway for PFOA degradation by identifying short chain perfluorocarboxylic acids (PFCA) as transformation products (TPs) using liquid chromatography quadrupole time-of-flight ...

2021年11月11日 · Despite restricted use due to current regulations on their use, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) remain the most commonly detected long-chain PFAS. This article reviews UV-based oxidative and …

Perfluorooctanoic acid (PFOA), an environmentally persistent pollutant, was found to be quickly decomposed under 254 nm UV irradiation in the presence of ferric ion and oxalic acid.

2011年1月1日 · This article aimed to elucidate photodegradation of PFOA in dilute aqueous solutions by combined UV wavelengths (185 nm+254 nm) and 254 nm using a newly designed UV jacket. PFOA degradation was greatly enhanced with the combined wavelengths with almost one hundred percent PFOA removals in four-hour reaction.

5 天之前 · In the UV/indole system, the interaction between indole and PFCA promoted the directed transfer of hydrated electrons, resulting in a significantly higher destruction efficiency for long-chain PFCA than for short-chain PFCA. However, the self-quenching of hydrated electrons in the UV/IAA system led to the ineffective decomposition for all PFCA.

2021年12月15日 · PFOA exhibits strong absorption from vacuum ultraviolet (VUV) to 220 nm, indicating that it is possible for UV light to directly degrade PFOA; meanwhile, it exhibits a weak, broad absorption from 220 to 270 nm, which may not be possible for photolysis.