Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia; International Postgraduate School Jožef Stefan, Jamova cesta 39, 1000 Ljubljana, Slovenia.
Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
Sci Total Environ. 2019 May 10;664:595-604. doi: 10.1016/j.scitotenv.2019.02.064. Epub 2019 Feb 5.
Bisphenols (BPs) are industrial chemicals that are used as monomers in the production of polycarbonate plastics and epoxy resins. These compounds can leach into the aqueous environment, where they can potentially have toxic effects. The aim of this study was to assess the photochemical degradation of three common bisphenols: BPF, BPS and BPZ in aqueous solution and determine their degradation kinetics and characterise their transformation products. Three independent experiments were performed based on: 1) direct photolysis using UV irradiation, 2) cyclodextrin-enhanced photolysis and 3) the photo-Fenton reaction. Analysis was performed using gas chromatography-mass spectrometry (GC-MS) and liquid chromatography coupled to high-resolution quadrupole-time-of-flight mass spectrometry (LC-QTOF-MS). This approach enabled for the first time a comparison between various conditions of photochemical degradation, revealing to be an effective way of removing (>90%) BPF, BPS and BPZ from aqueous samples. In all cases, degradation followed a pseudo-first order kinetic profile, while removal efficiency and formation of transformation products depended on the applied process. The photo-Fenton process resulted in the shortest half-lives (16.1 ̶ 21.7 min) and generated the highest number of transformation products. Overall, in this study we identified 11 novels and eight previously reported TPs.
双酚类物质（BPs）是一种工业化学物质，用作生产聚碳酸酯塑料和环氧树脂的单体。这些化合物会浸出到水相环境中，从而可能具有毒性影响。本研究旨在评估三种常见双酚类物质：BPF、BPS 和 BPZ 在水溶液中的光化学降解，并确定它们的降解动力学和特征转化产物。根据以下三种独立实验进行：1）使用紫外线照射的直接光解，2）环糊精增强的光解和 3）光芬顿反应。使用气相色谱-质谱联用仪（GC-MS）和液相色谱-高分辨率四极杆飞行时间质谱联用仪（LC-QTOF-MS）进行分析。这种方法首次能够比较各种光化学降解条件，证明是从水样中有效去除（>90%）BPF、BPS 和 BPZ 的方法。在所有情况下，降解均遵循拟一级动力学模式，而去除效率和转化产物的形成取决于所应用的工艺。光芬顿工艺导致最短的半衰期（16.1 ̶ 21.7 min），并生成最多数量的转化产物。总的来说，在这项研究中，我们共鉴定出 11 种新的和 8 种先前报道的 TPs。
