Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles

doi:10.1021/acs.est.9b02327

IEECAS OpenIR > 粉尘与环境研究室

	Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles
	Chen, Qingcai 1; Sun, Haoyao 1; Wang, Mamin 1; Wang, Yuqin 1; Zhang, Lixin 1; Han, Yuemei 2
通讯作者	Chen, Qingcai(chenqingcai@sust.edu.cn)
	2019-09-03
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	53 期号:17 页码:10053-10061
摘要	A secondary process may be an important source of environmentally persistent free radicals (EPFRs) in atmospheric particulates; yet, this process remains to be elucidated. This study demonstrated that secondary EPFRs could be generated by visible-light illumination of atmospheric particulate matter (PM), and their lifetimes were only 30 min to 1 day, which were much shorter than the lifetimes of the original EPFRs in PM. The yields of secondary EPFRs produced by PM could reach 15-60% of those of the original EPFRs. The extractable organic matter contributed to the formation of secondary EPFRs (similar to 55%), and a humic-like substance was the main precursor of the secondary EPFRs and was also the most productive precursor compared to the other aerosol components. The results of simulation experiments showed that the secondary EPFRs generated by the extractable and nonextractable PM components were similar to those produced by phenolic compounds and polycyclic aromatic hydrocarbons, respectively. We have found that oxygen molecules play an important role in the photochemical generation and decay of EPFRs. The reactive oxygen capture experiments showed that the original EPFRs may contribute to singlet oxygen generation, while the secondary EPFRs generated by photoexcitation may not produce singlet oxygen or hydroxyl radicals.
DOI	10.1021/acs.est.9b02327
关键词[WOS]	POLYCYCLIC AROMATIC-HYDROCARBONS ; PHOTOINDUCED TOXICITY ; COMBUSTION ; ANTHRACENE ; MODEL ; STABILIZATION ; ABSORPTION ; MECHANISMS ; REACTIVITY ; LIFETIMES
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41877354] ; National Natural Science Foundation of China[41703102] ; Natural Science Foundation of Shaanxi Province, China[2018JM4011]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province, China
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000484644500008
出版者	AMER CHEMICAL SOC
引用统计	被引频次：38[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13439
专题	粉尘与环境研究室
通讯作者	Chen, Qingcai
作者单位	1.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Chen, Qingcai,Sun, Haoyao,Wang, Mamin,et al. Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(17):10053-10061.
APA	Chen, Qingcai,Sun, Haoyao,Wang, Mamin,Wang, Yuqin,Zhang, Lixin,&Han, Yuemei.(2019).Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(17),10053-10061.
MLA	Chen, Qingcai,et al."Environmentally Persistent Free Radical (EPFR) Formation by Visible-Light Illumination of the Organic Matter in Atmospheric Particles".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.17(2019):10053-10061.