Kinetic and mechanism studies of musk tonalide reacted with hydroxyl radical and the risk assessment of degradation products
Fang, HS; Li, GY; Yao, SD; Liang, XM; An, TC
2017
发表期刊CATALYSIS TODAY
ISSN0920-5861
卷号281页码:642-648
文章类型期刊论文
摘要Tonalide was extensively used as fragrances in various personal care products and recognized as emerging contaminant recently. In this study, the transient reactions of hydrophobic tonalide with hydroxyl radical (center dot OH), one of highly reactive oxygen species (ROSs), was firstly investigated in acetonitrile through direct observation using laser flash photolysis. Two transient intermediates were formed with the peak centered at 360 and 450 nm, and the bimolecular reaction rate constants of tonalide with center dot OH were determined in both water and acetonitrile solutions with values of 4.04 x 10(9) and 1.95 x 10(9) M-1 respectively. Then, the photocatalytic experiments in a heterogeneous TiO2 system were carried out to study the decomposition kinetics of tonalide with "OH, which was confirmed as the dominant ROSs in photocatalytic system. Five degradation products were identified with molecule weight of 260, 272 and 274. Finally, the potential risks of reaction products formed through the reactions of tonalide with center dot OH were further investigated. It is found that the toxicity towards luminescent bacterium (Photobacterium phosphoreum) was not changed so much, and the estrogenic activity increased a little bit during the degradation of tonalide by center dot OH. (C) 2016 Elsevier B.V. All rights reserved.
关键词Tonalide Hydroxyl Radical Laser Flash Photolysis Risk Assessment
DOI10.1016/j.cattod.2016.06.021
收录类别SCI
语种英语
WOS记录号WOS:000390626400032
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27363
专题中科院上海应用物理研究所2011-2018年
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Fang, HS,Li, GY,Yao, SD,et al. Kinetic and mechanism studies of musk tonalide reacted with hydroxyl radical and the risk assessment of degradation products[J]. CATALYSIS TODAY,2017,281:642-648.
APA Fang, HS,Li, GY,Yao, SD,Liang, XM,&An, TC.(2017).Kinetic and mechanism studies of musk tonalide reacted with hydroxyl radical and the risk assessment of degradation products.CATALYSIS TODAY,281,642-648.
MLA Fang, HS,et al."Kinetic and mechanism studies of musk tonalide reacted with hydroxyl radical and the risk assessment of degradation products".CATALYSIS TODAY 281(2017):642-648.
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