School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
Chemosphere. 2022 Mar;291(Pt 1):132697. doi: 10.1016/j.chemosphere.2021.132697. Epub 2021 Oct 26.
The widespread use of halogenated flame retardants in recent years has led to the accumulation of TBBPA in water, which may cause potential harm to living organisms. The phototransformation of the flame retardant TBBPA in alkaline saline water under simulated sunlight irradiation was investigated. The effects of abiotic factors such as the initial concentration of TBBPA, chloride ion concentration, solution pH, inorganic anions and cations, dissolved organic matter (DOM) were studied. The results showed that the phototransformation rate of TBBPA accelerated with the decrease of the initial concentration of TBBPA, the increase of chloride ion concentration and solution pH. The scavenging experiments showed that •OH, O, O• and TBBPA* all participated in the phototransformation of TBBPA. The presence of NO, CO, SO, Mg, Ca, Fe and fulvic acid (FA) all inhibited the phototransformation of TBBPA in the present study. The phototransformation products of TBBPA were detected by liquid chromatography-mass spectrometry (LC-MS), and the phototransformation pathways were proposed. This is the first report on the photo-induced generation of halogen exchange products from TBBPA in saline solutions, which will contribute to a better understanding of the environmental behavior and risks of BFRs in water.
近年来，卤代阻燃剂的广泛使用导致了水中 TBBPA 的积累，这可能对生物体造成潜在危害。本研究考察了模拟太阳光照射下碱性盐水中阻燃剂 TBBPA 的光转化。研究了 TBBPA 的初始浓度、氯离子浓度、溶液 pH 值、无机阴离子和阳离子、溶解有机物（DOM）等非生物因素的影响。结果表明，TBBPA 的光转化速率随 TBBPA 初始浓度的降低、氯离子浓度和溶液 pH 值的增加而加快。清除实验表明，•OH、O、O•和 TBBPA*都参与了 TBBPA 的光转化。本研究中，NO、CO、SO、Mg、Ca、Fe 和富里酸（FA）的存在均抑制了 TBBPA 的光转化。通过液相色谱-质谱（LC-MS）检测到了 TBBPA 的光转化产物，并提出了光转化途径。这是首次报道在盐溶液中 TBBPA 发生光诱导卤代交换产物生成的情况，这将有助于更好地理解水中 BFRs 的环境行为和风险。
