Formation of environmentally persistent free radicals from thermochemical reactions of catechol
文献类型：期刊论文
| 作者 | Qin, Linjun; Yang, Lili; Liu, Xiaoyun; Li, Cui; Lin, Bingcheng; Zheng, Minghui; Liu, Guorui
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-06-10 |
| 卷号 | 772页码:- |
| 关键词 | Environmentally persistent free radicals Catechol Thermochemical reaction Metal oxide Electron paramagnetic resonance spectroscopy |
| ISSN号 | 0048-9697 |
| 英文摘要 | In many anthropogenic activities, catechol as a widespread organic chemical could be released and also environmentally persistent free radicals (EPFRs) can be unintentionally formed. However, the underlying links between EPFRs and the role of catechol as an important precursor are not well understood. In this study, EPFR formation from catechol during heating was monitored online by electron paramagnetic resonance spectroscopy. It was found that catechol can produce significant amounts of EPFRs via thermochemical reactions. The EPFR species formed from catechol on metal oxides were oxygen-centered phenoxy and semiquinone radicals. Their halflives were evaluated to be in the range of 113-909 h. The promotional effects of CaO and CuO on EPFR formation from catechol were stronger than that of Fe2O3. The promotional abilities and underlying mechanisms of various metal oxides in EPFR formation were clarified by X-ray photoelectron spectroscopy. Significant EPFR formation was observed during the cooling stage of a heating reaction system when CaO was used as the reaction medium. The obtained knowledge on the formation of EPFRs from catechol and the key factors involved will enable better control of the formation of EPFRs from anthropogenic activities. (C) 2021 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45733]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoreicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 3.UCAS, Hangzhou Inst Adv Study, Sch Environm, Hangzhou 310000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Linjun,Yang, Lili,Liu, Xiaoyun,et al. Formation of environmentally persistent free radicals from thermochemical reactions of catechol[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,772:-. |
| APA | Qin, Linjun.,Yang, Lili.,Liu, Xiaoyun.,Li, Cui.,Lin, Bingcheng.,...&Liu, Guorui.(2021).Formation of environmentally persistent free radicals from thermochemical reactions of catechol.SCIENCE OF THE TOTAL ENVIRONMENT,772,-. |
| MLA | Qin, Linjun,et al."Formation of environmentally persistent free radicals from thermochemical reactions of catechol".SCIENCE OF THE TOTAL ENVIRONMENT 772(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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