气候变化领域集成服务门户(CCPortal): Photolytic radical persistence due to anoxia in viscous aerosol particles

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DOI	10.1038/s41467-021-21913-x
	Photolytic radical persistence due to anoxia in viscous aerosol particles
	Alpert P.A.; Dou J.; Corral Arroyo P.; Schneider F.; Xto J.; Luo B.; Peter T.; Huthwelker T.; Borca C.N.; Henzler K.D.; Schaefer T.; Herrmann H.; Raabe J.; Watts B.; Krieger U.K.; Ammann M.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	In viscous, organic-rich aerosol particles containing iron, sunlight may induce anoxic conditions that stabilize reactive oxygen species (ROS) and carbon-centered radicals (CCRs). In laboratory experiments, we show mass loss, iron oxidation and radical formation and release from photoactive organic particles containing iron. Our results reveal a range of temperature and relative humidity, including ambient conditions, that control ROS build up and CCR persistence in photochemically active, viscous organic particles. We find that radicals can attain high concentrations, altering aerosol chemistry and exacerbating health hazards of aerosol exposure. Our physicochemical kinetic model confirmed these results, implying that oxygen does not penetrate such particles due to the combined effects of fast reaction and slow diffusion near the particle surface, allowing photochemically-produced radicals to be effectively trapped in an anoxic organic matrix. © 2021, The Author(s).
语种	英语
scopus关键词	carbon; carboxyl group; iron; oxygen; radical; reactive oxygen metabolite; aerosol; anoxia; anoxic conditions; biochemistry; diffusion; oxidation; oxygen; radical; reactive oxygen species; aerosol; anoxia; Article; chemical reaction; controlled study; health hazard; kinetics; light exposure; oxidation; photolysis; relative humidity; temperature; ultraviolet radiation; water transport
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251494
作者单位	Laboratory of Environmental Chemistry, Paul Scherrer Institute, Villigen, Switzerland; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, Villigen, Switzerland; Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany; Laboratory for Synchrotron Radiation-Condensed Matter, Paul Scherrer Institute, Villigen, Switzerland; Laboratory for Physical Chemistry, ETH Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Alpert P.A.,Dou J.,Corral Arroyo P.,et al. Photolytic radical persistence due to anoxia in viscous aerosol particles[J],2021,12(1).
APA	Alpert P.A..,Dou J..,Corral Arroyo P..,Schneider F..,Xto J..,...&Ammann M..(2021).Photolytic radical persistence due to anoxia in viscous aerosol particles.Nature Communications,12(1).
MLA	Alpert P.A.,et al."Photolytic radical persistence due to anoxia in viscous aerosol particles".Nature Communications 12.1(2021).