Photoinduced formation of persistent free radicals, hydrogen radicals, and hydroxyl radicals from catechol on atmospheric particulate matter

被引：32
|
作者：
Qin, Linjun [1 ,2 ]
Yang, Lili [1 ,2 ]
Yang, Jiahui [3 ]
Weber, Ralph [4 ]
Ranguelova, Kalina [4 ]
Liu, Xiaoyun [1 ,2 ]
Lin, Bingcheng [5 ]
Li, Cui [1 ,2 ]
Zheng, Minghui [1 ,2 ,5 ]
Liu, Guorui [1 ,2 ,5 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China
[3] Bruker BioSpin Corp, Shanghai 200233, Peoples R China
[4] Bruker BioSpin Corp, Billerica, MA 01821 USA
[5] UCAS, Hangzhou Inst Adv Study, Sch Environm, Hangzhou 310000, Peoples R China
来源：
ISCIENCE | 2021年 / 24卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ELECTRON-PARAMAGNETIC-RESONANCE; HIGH-TEMPERATURE PYROLYSIS; PHENOXY RADICALS; DIOXIN FORMATION; P-DIOXINS; GENERATION; XPS; SPECTROSCOPY; MECHANISMS; MODEL;
D O I：
10.1016/j.isci.2021.102193
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Catechol is speculated to be a potential precursor of environmentally persistent free radicals (EPFRs) in the atmosphere. EPFRs absorbed on PM2.5 have attracted public attention because their toxicity is similar to cigarette smoke. In this study, we found that catechol could produce EPFRs, which were oxygen-centered phenoxy and semiquinone radicals. These free radical species had half-lives of up to 382 days. CaO, CuO, and Fe2O3 markedly promoted EPFR formation from catechol. The valence states of Cu and Fe changed during the photochemical reactions of catechol but no valence state changed for Ca. Alkaline nature of CaO is possibly the key for promoting the free radical formations through acid-base reactions with catechol. In addition to hydroxyl free radicals, hydrogen free radicals and superoxide anions formed from the photochemical reactions of catechol were first discovered. This is of concern because of the adverse effects of these free radicals on human health.
引用
收藏
页数：24
相关论文
共 50 条
  • [1] 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
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2021, 772
  • [2] Stability of environmentally persistent free radicals (EPFR) in atmospheric particulate matter and combustion particles
    Runberg, Heather L.
    Mitchell, Deborah G.
    Eaton, Sandra S.
    Eaton, Gareth R.
    Majestic, Brian J.
    [J]. ATMOSPHERIC ENVIRONMENT, 2020, 240
  • [3] Risk evaluation of environmentally persistent free radicals in airborne particulate matter and influence of atmospheric factors
    Xu, Yang
    Yang, Lili
    Wang, Xiaoping
    Zheng, Minghui
    Li, Cui
    Zhang, Aiqian
    Fu, Jianjie
    Yang, Yuanping
    Qin, Linjun
    Liu, Xiaoyun
    Liu, Guorui
    [J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 2020, 196
  • [4] STUDIES IN FREE-RADICALS .1. PHOTOINDUCED ADDITION OF HYDROXYL RADICALS TO CYCLOALKENES
    KELKAR, RG
    SONAWANE, HR
    [J]. INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY, 1979, 18 (01): : 6 - 7
  • [5] Environmentally persistent free radicals in indoor particulate matter, dust, and on surfaces
    Filippi, A.
    Sheu, R.
    Berkemeier, T.
    Poeschl, U.
    Tong, H.
    Gentner, D. R.
    [J]. ENVIRONMENTAL SCIENCE-ATMOSPHERES, 2022, 2 (02): : 128 - 136
  • [6] Major influence of hydroxyl and nitrate radicals on air pollution by environmentally persistent free radicals
    Wenxiao Pan
    Jiamin Chang
    Shuming He
    Qiao Xue
    Xian Liu
    Jianjie Fu
    Aiqian Zhang
    [J]. Environmental Chemistry Letters, 2021, 19 : 4455 - 4461
  • [7] Major influence of hydroxyl and nitrate radicals on air pollution by environmentally persistent free radicals
    Pan, Wenxiao
    Chang, Jiamin
    He, Shuming
    Xue, Qiao
    Liu, Xian
    Fu, Jianjie
    Zhang, Aiqian
    [J]. ENVIRONMENTAL CHEMISTRY LETTERS, 2021, 19 (06) : 4455 - 4461
  • [8] Formation and stabilization of persistent free radicals
    Dellinger, Barry
    Loninicki, Slawomir
    Khachatryan, Lavrent
    Maskos, Zofia
    Hall, Randall W.
    Adounkpe, Julien
    McFerrin, Cheri
    Truong, Hieu
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2007, 31 (521-528) : 521 - 528
  • [9] Environmentally Persistent Free Radicals (EPFRs)-2. Are Free Hydroxyl Radicals Generated in Aqueous Solutions?
    Khachatryan, Lavrent
    Dellinger, Barry
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2011, 45 (21) : 9232 - 9239
  • [10] Free vs. Bound Hydroxyl Radicals Generated by Environmentally Persistent Free Radicals in Aqueous Solutions
    Khachatryan, Lavrent
    McFerrin, Cheri
    Dellinger, Barry
    [J]. FREE RADICAL BIOLOGY AND MEDICINE, 2012, 53 : S149 - S149
12345