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首页> 外文期刊>Environmental Science & Technology >Time-Related Alteration of Aqueous-Phase Anthracene and Phenanthrene Photoproducts in the Presence of TiO_2 Nanoparticles
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Time-Related Alteration of Aqueous-Phase Anthracene and Phenanthrene Photoproducts in the Presence of TiO_2 Nanoparticles

机译：在TiO_2纳米粒子存在下，在TiO_2纳米粒子存在下与水相蒽和菲光调解的时间相关的改变

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摘要

Polycyclic aromatic hydrocarbons (PAHs) and titanium dioxide (TiO_2) nanoparticles (NPs) are photoactive environmental pollutants that can contaminate aquatic environments. Aqueous-phase interactions between PAHs and TiO_2-NPs are of interest due to their emerging environmental relevance, particularly with the deliberate application of TiO_2-NPs to remediate pollution events (e.g., oil spills). Our objective was to investigate anthracene (ANT) and phenanthrene (PHE) photoproduct formation and transformation following ultraviolet A (UVA) irradiation in the presence and absence of TiO_2-NPs. ANT and PHE solutions were prepared alone or in combination with TiO_2-NPs, UVA-irradiated, and either exposed to larval zebrafish or collected for chemical analyses of diverse hydroxylated PAHs (OHPAHs) and oxygenated PAHs (OPAHs). The expression profiles of genes encoding for enzymes involved in PAH metabolism showed PAH-specific and time-dependent inductions that demonstrated changes in PAH and photoproduct bioa variability in the presence of TiO_2-NPs. Chemical analyses of PAH/NP solutions in the absence of zebrafish larvae identified diverse photoproducts of differing size and ring arrangements, which suggested photodissociation, recombination, and ring re-arrangements of PAHs occurred either during or following UVA irradiation. Both ANT and PHE solutions showed heightened oxidative potential following irradiation, but TiO_2-NP-related increases in oxidative potential were PAH-specific. The exploitation of multiple analytical methods provided novel insights into distinct PAH photoactivity, TiO_2-NP influence on photoproduct formation in a PAH-specific manner, and the significant role time plays in photochemical processes.
机译：多环芳烃（PAHS）和二氧化钛（TiO_2）纳米颗粒（NPS）是可污染水产环境的光活性环境污染物。 PAHS和TiO_2-NP之间的水相互作相互作用由于其新出现的环境相关性而感兴趣，特别是在蓄意应用TiO_2-NP来修复污染事件（例如，溢油）。我们的目的是在存在和不存在TiO_2-NPS的情况下探讨紫外线A（UVA）辐射后的蒽（蚂蚁）和菲（PHE）光Phroduct形成和转化。蚂蚁和PHE溶液单独或与TiO_2-NPS，UVA辐照的组合制备，并且暴露于幼虫斑马鱼或收集以进行化学分析，用于各种羟基化的PAHS（OHPAH）和含氧量的PAHS（OPAH）。编码参与PAH代谢的酶的基因的表达谱显示出PAH特异性和时间依赖性诱导，在TiO_2-NPS存在下证明了PAH和光调节生物变异性的变化。 PAH / NP溶液在没有斑马鱼幼虫的情况下的化学分析确定了不同尺寸和环形布置的不同光调节，其提出了PAHS的光度解除，重组和环重新布置在UVA辐射期间或之后发生。抗辐射后氧化潜力的两种蚂蚁和PHE溶液都显示出高温，但氧化潜力的TiO_2-NP相关增加是PAH特异性。多种分析方法的利用为不同的PAH光接收性提供了新的洞察力，TiO_2-NP以PAH特异性方式对光调节形成的影响，以及光化学过程中的显着作用。

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  • 来源
    《Environmental Science & Technology》 |2021年第6期|3727-3735|共9页
  • 作者

    Lindsey St. Mary; Lisandra S.D. Trine; Courtney Roper; Jackson Wiley; Staci L. Massey Simonich; Martin McCoustra; Theodore B. Henry;

  • 作者单位

    Institute of Life and Earth Sciences School of Energy Geoscience Infrastructure and Society Heriot-Watt University Edinburgh EH14 4AS U.K.;

    Department of Environmental and Molecular Toxicology College of Agricultural Sciences Oregon State University Corvallis 97331 United States;

    Department of Environmental and Molecular Toxicology College of Agricultural Sciences Oregon State University Corvallis 97331 United States Department of Biomolecular Sciences University of Mississippi University Mississippi 38677 United States;

    Department of Environmental and Molecular Toxicology College of Agricultural Sciences Oregon State University Corvallis 97331 United States;

    Department of Environmental and Molecular Toxicology College of Agricultural Sciences Oregon State University Corvallis 97331 United States;

    Institute of Chemical Sciences School of Engineering and Physical Sciences Heriot-Watt University Edinburgh EH14 4AS U.K.;

    Institute of Life and Earth Sciences School of Energy Geoscience Infrastructure and Society Heriot-Watt University Edinburgh EH14 4AS U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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