Horikoshi Satoshi, Sawada Seiya, Tsuchida Akihiro, Serpone Nick
Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University.
PhotoGreen Laboratory, Dipartimento di Chimica, Università di Pavia.
J Oleo Sci. 2020 Mar 1;69(3):261-269. doi: 10.5650/jos.ess19333. Epub 2020 Feb 13.
We report the enhanced degradation of a widely used brominated flame retardant, tetrabromobisphenol-A (TBBPA), which is soluble only in organic solvents and strongly alkaline solutions, where most advanced oxidation processes (AOPs) for such substrates tend to be rather inefficient. We further report an environmentally friendly method (microwave-induced plasma-in-liquid; MPL) that operates efficiently in alkaline aqueous media without the need for organic solvents to enhance the solubility of TBBPA in water. The enhanced debromination and almost complete mineralization of TBBPA under alkaline conditions occurs within 20 min of MPL irradiation. This method, which is a new member of the AOP family, provides a simple and green approach to detoxify aqueous media contaminated with TBBPA, which requires only electric power and neither catalysts nor oxidizing agents. Several intermediate species have been identified by liquid chromatography/mass spectrometry (LC-MS), following events that involved reactive oxygen species (ROSs) such as·OH, whose first task was to approach the substrate at carbon atoms bearing the highest electron densities.
我们报道了一种广泛使用的溴化阻燃剂四溴双酚 A（TBBPA）的降解得到增强，该阻燃剂仅溶于有机溶剂和强碱性溶液，而针对这类底物的大多数高级氧化过程（AOPs）往往效率较低。我们还报道了一种环境友好型方法（微波诱导液中等离子体；MPL），该方法在碱性水介质中高效运行，无需有机溶剂来提高 TBBPA 在水中的溶解度。在碱性条件下，MPL 辐照 20 分钟内，TBBPA 的脱溴作用增强且几乎完全矿化。这种方法作为 AOP 家族的新成员，提供了一种简单且绿色的方法来对受 TBBPA 污染的水介质进行解毒，该方法仅需电力，既不需要催化剂也不需要氧化剂。通过液相色谱/质谱联用（LC-MS）鉴定出了几种中间产物，这些事件涉及活性氧物种（ROSs），如·OH，其首要任务是在电子密度最高的碳原子处接近底物。
