四溴双酚A
化学
水溶液
高锰酸盐
反应性(心理学)
反应速率常数
阻燃剂
溴
电喷雾电离
溴化阻燃剂
高锰酸钾
质谱法
动力学
无机化学
有机化学
色谱法
替代医学
病理
物理
医学
量子力学
作者
Su–Yan Pang,Jin Jiang,Yuan Gao,Yang Zhou,Xiaoliu Huangfu,Yongze Liu,Jun Ma
摘要
In this work, the most widely used brominated flame retardant tetrabromobisphenol A (TBrBPA) was shown to exhibit appreciable reactivity toward potassium permanganate [Mn(VII)] in water over a wide pH range of 5–10 with the maxima of second-order rate constants (kMn(VII) = 15–700 M–1 s–1) at pH near its pKa values (7.5/8.5). A novel precursor ion scan (PIS) approach using negative electrospray ionization-triple quadrupole mass spectrometry (ESI-QqQMS) was adopted and further optimized for fast selective detection of brominated oxidation products of TBrBPA by Mn(VII). By setting PIS of m/z 79 and 81, two major products (i.e., 4-(2-hydroxyisopropyl)-2,6-dibromophenol and 4-isopropylene-2,6-dibromophenol) and five minor ones (including 2,6-dibromophenol, 2,6-dibromo-1,4-benzoquinone, and three dimers) were detected and suggested with chemical structures from their product ion spectra and bromine isotope patterns. Reaction pathways mainly involving the initial one-electron oxidation of TBrBPA and subsequent release and further reactions of 2,6-dibromo-4-isopropylphenol carbocation intermediate were proposed. The effectiveness of Mn(VII) for treatment of TBrBPA in real waters was confirmed. It is important to better understand the reactivity and toxicity of primary brominated products before Mn(VII) can be applied for treatment of TBrBPA-contaminated wastewater and source water.
科研通智能强力驱动
Strongly Powered by AbleSci AI