气候变化领域集成服务门户(CCPortal): In-cloud formation of secondary species in iron-containing particles

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DOI	10.5194/acp-19-1195-2019
	In-cloud formation of secondary species in iron-containing particles
	Lin Q.; Bi X.; Zhang G.; Yang Y.; Peng L.; Lian X.; Fu Y.; Li M.; Chen D.; Miller M.; Ou J.; Tang M.; Wang X.; Peng P.; Sheng G.; Zhou Z.
发表日期	2019
ISSN	16807316
起始页码	1195
结束页码	1206
卷号	19 期号:2
英文摘要	The increase in secondary species through cloud processing potentially increases aerosol iron (Fe) bioavailability. In this study, a ground-based counterflow virtual impactor coupled with a real-time single-particle aerosol mass spectrometer was used to characterize the formation of secondary species in Fe-containing cloud residues (dried cloud droplets) at a mountain site in southern China for nearly 1 month during the autumn of 2016. Fe-rich, Fe-dust, Fe-elemental carbon (Fe-EC), and Fe-vanadium (Fe-V) cloud residual types were obtained in this study. The Fe-rich particles, related to combustion sources, contributed 84 % (by number) to the Fe-containing cloud residues, and the Fe-dust particles represented 12 %. The remaining 4 % consisted of the Fe-EC and Fe-V particles. It was found that above 90 % (by number) of Fe-containing particles had already contained sulfate before cloud events, leading to no distinct change in number fraction (NF) of sulfate during cloud events. Cloud processing contributed to the enhanced NFs of nitrate, chloride, and oxalate in the Fe-containing cloud residues. However, the in-cloud formation of nitrate and chloride in the Fe-rich type was less obvious relative to the Fe-dust type. The increased NF of oxalate in the Fe-rich cloud residues was produced via aqueous oxidation of oxalate precursors (e.g., glyoxylate). Moreover, Fe-driven Fenton reactions likely increase the formation rate of aqueous-phase OH, improving the conversion of the precursors to oxalate in the Fe-rich cloud residues. During daytime, the decreased NF of oxalate in the Fe-rich cloud residues was supposed to be due to the photolysis of Fe-oxalate complexes. This work emphasizes the role of combustion Fe sources in participating in cloud processing and has important implications for evaluating Fe bioavailability from combustion sources during cloud processing. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; aerosol composition; bioavailability; combustion; ground-based measurement; iron; mountain region; point source; China
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144687
作者单位	State Key Lab. of Organ. Geochem. and Guangdong Key Lab. of Environ. Rsrc. Utiliz. and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100039, China; Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou, 510632, China; State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou, 510308, China; Department of Environmental Sciences, Rutgers, State University of New Jersey, New Brunswick, NJ 08901, United States; Shaoguan Environmental Monitoring Center, Shaoguan, 512026, China
推荐引用方式 GB/T 7714	Lin Q.,Bi X.,Zhang G.,et al. In-cloud formation of secondary species in iron-containing particles[J],2019,19(2).
APA	Lin Q..,Bi X..,Zhang G..,Yang Y..,Peng L..,...&Zhou Z..(2019).In-cloud formation of secondary species in iron-containing particles.Atmospheric Chemistry and Physics,19(2).
MLA	Lin Q.,et al."In-cloud formation of secondary species in iron-containing particles".Atmospheric Chemistry and Physics 19.2(2019).