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Formation of environmentally persistent free radicals from thermochemical reactions of catechol
Qin, Linjun; Yang, Lili; Liu, Xiaoyun; Li, Cui; Lin, Bingcheng; Zheng, Minghui; Liu, Guorui
2021-06-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume772Pages:-
AbstractIn 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.
Department环境化学与生态毒理学国家重点实验
KeywordEnvironmentally persistent free radicals Catechol Thermochemical reaction Metal oxide Electron paramagnetic resonance spectroscopy
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45733
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.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
Recommended Citation
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):-.
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