Oak Ridge Institute for Science and Education, P. O. Box 117, Oak Ridge, TN, 37831, USA; Pegasus Technical Services, Inc., 46 E. Hollister Street, Cincinnati, OH, 45219, USA.
Oak Ridge Institute for Science and Education, P. O. Box 117, Oak Ridge, TN, 37831, USA.
Chemosphere. 2021 Oct;280:130660. doi: 10.1016/j.chemosphere.2021.130660. Epub 2021 Apr 27.
Per- and polyfluoroalkyl substances (PFAS) are a large group of perfluorinated organic molecules that have been in use since the 1940s for industrial, commercial, and consumer applications. PFAS are a growing concern because some of them have shown persistent, bioaccumulative and toxic effects. Herein, we demonstrate an innovative technology of UV-vis/ZnCuFeO/oxalic acid for the degradation of perfluorooctanoic acid (PFOA) in water. The magnetically retrievable nanocrystalline heterogeneous ferrite catalysts, ZnCuFeO were synthesized using a sol-gel auto-combustion process followed by calcination at 400 °C. The combination of ZnCuFeO and oxalic acid generate reactive species under UV light irradiation. These reactive species are then shown to be capable of the photodegradation of PFOA. The degree of degradation is tracked by identifying transformation products using liquid chromatography coupled with quadrupole time-of-flight mass spectroscopy (LC-QTOF-MS).
全氟和多氟烷基物质（PFAS）是一大类全氟有机分子，自 20 世纪 40 年代以来，它们一直被用于工业、商业和消费应用。PFAS 引起了越来越多的关注，因为其中一些物质具有持久性、生物累积性和毒性。在此，我们展示了一种用于水中全氟辛酸（PFOA）降解的 UV-vis/ZnCuFeO/草酸创新技术。采用溶胶-凝胶自燃烧法合成了可磁回收纳米晶多铁氧体催化剂 ZnCuFeO，然后在 400°C 下煅烧。ZnCuFeO 和草酸在紫外光照射下产生活性物质。这些活性物质随后被证明能够光降解 PFOA。通过使用液相色谱-四极杆飞行时间质谱（LC-QTOF-MS）鉴定转化产物来跟踪降解程度。
