Jia Jialin, Liu Dongmei, Wang Qiao, Li Huarui, Ni Jiaxin, Cui Fuyi, Tian Jiayu
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2022 Feb 15;424(Pt B):127434. doi: 10.1016/j.jhazmat.2021.127434. Epub 2021 Oct 6.
In this work, degradation of bisphenol F (BPF), bisphenol AF (BPAF) and bisphenol S (BPS) by peroxymonosulfate (PMS) with TiO nano-tubes arrays (TiONTAs) under simulated sunlight irradiation was investigated and compared for the first time. All three bisphenols exhibited appreciable degradation following the order of BPS < BPAF < BPF, and acidic conditions were more conducive to their degradation. The SO, ·OH, h and O were all identified in three bisphenols degradation processes. Among these, SO and O were proven to play a dominant role in BPF oxidation process, but SO and h were confirmed as the main reactive species for BPAF and BPS removal. Owing to the different reactive species worked in different bisphenols degradation processes, the influences of inorganic anions on three bisphenols degradation were also different. By analyzing the oxidation intermediates of the three bisphenols, it was found that there were some common degradation pathways including bond-cleavage and hydroxylation of the benzene ring shared by three bisphenols. Besides, some specific degradation pathways were also identified, for example, the self-coupling was found in BPF and BPS degradation process, while the benzene ring splitting was occurred only in BPAF transformation process.
在这项工作中，首次研究并比较了在模拟阳光照射下，过一硫酸（PMS）与TiO纳米管阵列（TiONTAs）对双酚F（BPF）、双酚AF（BPAF）和双酚S（BPS）的降解情况。所有三种双酚均表现出明显的降解，降解顺序为BPS < BPAF < BPF，且酸性条件更有利于它们的降解。在三种双酚的降解过程中均鉴定出了SO、·OH、h和O。其中，SO和O被证明在BPF氧化过程中起主导作用，但SO和h被确认为去除BPAF和BPS的主要活性物种。由于不同的活性物种在不同双酚的降解过程中起作用，无机阴离子对三种双酚降解的影响也不同。通过分析三种双酚的氧化中间体，发现存在一些共同的降解途径，包括三种双酚共有的苯环键断裂和羟基化。此外，还确定了一些特定的降解途径，例如，在BPF和BPS降解过程中发现了自偶联现象，而苯环裂解仅发生在BPAF转化过程中。
