气候变化领域集成服务门户(CCPortal): Volatility Dependence of the Aerosol Size Distributions of Nonpolar Organic Compounds: A Case Study in Shanghai

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DOI	10.1029/2019JD031894
	Volatility Dependence of the Aerosol Size Distributions of Nonpolar Organic Compounds: A Case Study in Shanghai
	Lyu Y.; Li X.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	The aerosol size distribution of organic compounds is one of the fundamental characteristics that regulates their atmospheric deposition and environmental fate. In this study, we characterized the organic components (mostly nonpolar organic compounds) in size-resolved particles, with a focus on polycyclic aromatic hydrocarbons (PAHs), oxygenated PAHs (O-PAHs), n-alkanes, and polybrominated diphenyl ethers (PBDEs), in the urban Shanghai atmosphere during a 1-year sampling period using gas chromatography (GC) coupled to tandem mass spectrometry (GC-MS/MS) and two-dimensional GC with a flame ionization detector (GC × GC-FID). These compounds ranged from volatile organic compounds (VOCs) to extremely low volatility organic compounds (ELVOCs). We related their aerosol size distributions with their volatilities. On average, high positive correlations (p < 0.01) were observed between the size distribution characteristics (e.g., geometric mean diameter [GMD] and mass fraction in coarse particles) and volatility (logarithmic value of the saturation mass concentration, log C) for the compounds that we examined. A higher ambient temperature tends to increase the slope of the regression line between size distribution and volatility (log C). Further dry deposition modeling of size-resolved particles showed a positive correlation (p < 0.01) between the bulk dry deposition velocity and GMD and between the bulk dry deposition velocity and volatility of the target compounds, indicating that low-volatility organic compounds have a lower dry deposition velocity and are more likely to be transported to remote areas if they do not have a short half-life in the atmosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	dry deposition; geometric mean diameter; organic aerosols; size distribution; volatility
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185956
作者单位	Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, China; Now at School of Energy and Environment, City University of Hong Kong, Hong Kong; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
推荐引用方式 GB/T 7714	Lyu Y.,Li X.. Volatility Dependence of the Aerosol Size Distributions of Nonpolar Organic Compounds: A Case Study in Shanghai[J],2020,125(12).
APA	Lyu Y.,&Li X..(2020).Volatility Dependence of the Aerosol Size Distributions of Nonpolar Organic Compounds: A Case Study in Shanghai.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Lyu Y.,et al."Volatility Dependence of the Aerosol Size Distributions of Nonpolar Organic Compounds: A Case Study in Shanghai".Journal of Geophysical Research: Atmospheres 125.12(2020).