气候变化领域集成服务门户(CCPortal): Measurements, Gas/Particle Partitioning, and Sources of Nonpolar Organic Molecular Markers at a Suburban Site in the West Yangtze River Delta, China

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DOI	10.1029/2020JD034080
	Measurements, Gas/Particle Partitioning, and Sources of Nonpolar Organic Molecular Markers at a Suburban Site in the West Yangtze River Delta, China
	Gou Y.; Qin C.; Liao H.; Xie M.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	This study seeks to understand the ambient levels, gas/particle partitioning, and sources of nonpolar organic molecular makers (OMMs) at a suburban site in Nanjing, China. Particle- and gas-phase OMMs were collected using a medium volume sampler equipped with two quartz filters in series and a polyurethane foam (PUF)/XAD-4/PUF (PXP) adsorbent sandwich. More than 100 pairs of filter and PXP samples were collected diurnally from September 2018 to September 2019. The concentration profiles of total n-alkanes and polycyclic aromatic hydrocarbons were peaking at n-C12–n-C17 homologs (9.98 ± 5.43–38.4 ± 17.7 ng m−3) and naphthalene (92.5 ± 56.7 ng m−3), respectively, followed by decreasing concentrations with further increases in molecular weight. Three artifact correction methods with different pre-assumptions on relative contributions of evaporation loss to backup filter measurements were used to separate particle- and gas-phase OMMs. The resulting particle-phase fractions showed significant differences for OMMs with vapor pressure <10−9 atm at 298.15 K. Absorptive gas/particle partitioning coefficients of OMMs were empirically calculated based on measurements and theoretically predicted for comparison. The results obtained under the three artifact correction methods suggested growing importance of evaporation loss with decreased vapor pressure. Positive matrix factorization (PMF) was performed for source apportionment using total (PMFtotal) and particle-phase (PMFparticle) OMMs data, respectively. Besides eliminating the influence of gas/particle partitioning, the involvements of more volatile species and gaseous OMMs data improved the identification of specific emission sources, supporting the usage of total OMMs data over a wide vapor pressure range for PMF source apportionment. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	gas/particle partitioning; organic molecular maker; sampling artifact; source apportionment
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/236968
作者单位	Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China; Colleges of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
推荐引用方式 GB/T 7714	Gou Y.,Qin C.,Liao H.,et al. Measurements, Gas/Particle Partitioning, and Sources of Nonpolar Organic Molecular Markers at a Suburban Site in the West Yangtze River Delta, China[J],2021,126(19).
APA	Gou Y.,Qin C.,Liao H.,&Xie M..(2021).Measurements, Gas/Particle Partitioning, and Sources of Nonpolar Organic Molecular Markers at a Suburban Site in the West Yangtze River Delta, China.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Gou Y.,et al."Measurements, Gas/Particle Partitioning, and Sources of Nonpolar Organic Molecular Markers at a Suburban Site in the West Yangtze River Delta, China".Journal of Geophysical Research: Atmospheres 126.19(2021).