气候变化领域集成服务门户(CCPortal): Probing key organic substances driving new particle growth initiated by iodine nucleation in coastal atmosphere

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DOI	10.5194/acp-20-9821-2020
	Probing key organic substances driving new particle growth initiated by iodine nucleation in coastal atmosphere
	Wan Y.; Huang X.; Jiang B.; Kuang B.; Lin M.; Xia D.; Liao Y.; Chen J.; Zhen Yu J.; Yu H.
发表日期	2020
ISSN	1680-7316
起始页码	9821
结束页码	9835
卷号	20 期号:16
英文摘要	Unlike the deep understanding of highly oxygenated organic molecules (HOMs) driving continental new particle formation (NPF), little is known about the organic compounds involved in coastal and open-ocean NPF. On the coastline of China we observed intense coastal NPF events initiated by iodine nucleation, but particle growth to cloud condensation nuclei (CCN) sizes was dominated by organic compounds. This article reveals a new group of C18;30HhOoNn and C20;24;28;33HhOo compounds with specific double-bond equivalents and oxygen atom numbers in new sub 20 nm coastal iodine particles by using ultrahighresolution Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR-MS). We proposed these compounds are oxygenated or nitrated products of long-chain unsaturated fatty acids, fatty alcohols, nonprotein amino acids or amino alcohols emitted mutually with iodine from coastal biota or biologically active sea surface. Group contribution method estimated that the addition of -ONO2, -OH and - CDO groups to the precursors reduced their volatility by 2-7 orders of magnitude and thus made their products condensable onto new iodine particles in the coastal atmosphere. Nontarget MS analysis also provided a list of 440 formulas of iodinated organic compounds in size-resolved aerosol samples during the iodine NPF days, which facilitates the understanding of unknown aerosol chemistry of odine. © 2019 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; chemical composition; FTIR spectroscopy; iodine; mass spectrometry; nucleation; particle size; spatial resolution; trace element
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/141145
作者单位	Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
推荐引用方式 GB/T 7714	Wan Y.,Huang X.,Jiang B.,et al. Probing key organic substances driving new particle growth initiated by iodine nucleation in coastal atmosphere[J],2020,20(16).
APA	Wan Y..,Huang X..,Jiang B..,Kuang B..,Lin M..,...&Yu H..(2020).Probing key organic substances driving new particle growth initiated by iodine nucleation in coastal atmosphere.Atmospheric Chemistry and Physics,20(16).
MLA	Wan Y.,et al."Probing key organic substances driving new particle growth initiated by iodine nucleation in coastal atmosphere".Atmospheric Chemistry and Physics 20.16(2020).