气候变化领域集成服务门户(CCPortal): Molecular composition and optical property of humic-like substances (HULIS) in winter-time PM2.5 in the rural area of North China Plain

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DOI	10.1016/j.atmosenv.2021.118316
	Molecular composition and optical property of humic-like substances (HULIS) in winter-time PM2.5 in the rural area of North China Plain
	Sun H.; Li X.; Zhu C.; Huo Y.; Zhu Z.; Wei Y.; Yao L.; Xiao H.; Chen J.
发表日期	2021
ISSN	1352-2310
卷号	252
英文摘要	In order to distinguish the role of organic composition in haze episodes frequently happening in the North China Plain (NCP), the molecular composition, sources and optical property of humic-like substances (HULIS) in winter-time PM2.5 in a rural area in NCP were investigated. Fifty-five p.m.2.5 samples were collected in the day and night time from Wangdu County (a typical rural area in NCP) in Hebei province from November 4 to December 29 in 2017, and HULIS-C, OC/EC, water-soluble organic carbon (WSOC), water soluble ions and levoglucosan were simultaneously analyzed. The average concentrations of HULIS-C were 5.75 ± 2.73 μg m−3 and 7.39 ± 3.35 μg m−3 in daytime and nighttime, contributing 59 wt% and 55 wt% to WSOC, respectively. Biomass burning, coal combustion and secondary formation were identified as the main sources of HULIS. The values of Ångström absorption exponent (AAE) and mass absorption efficiencies at 365 nm (MAE365) of HULIS were in a moderate level compared with other areas and primary source (biomass burning and coal combustion). Three fluorescent components of HULIS were classified according to the excitation-emission matrix (EEM) combined with parallel factor model (PARAFAC): C1 (less oxygenated humic-like substance), C2 (highly oxygenated humic-like substance) and C3 (protein-like substance). Pearson's correlation coefficient indicated that C2 may be the dominant substance affecting the light absorption properties of HULIS and C3 contributed most to the total fluorescence intensity. FT-ICR MS identified 1839 and 2777 compound species of HULIS for lightly polluted sample and heavily polluted samples, respectively, and CHO/CHNO compounds were the main parts of HULIS in the ESI (−) mode. Lignin-like (64% and 62%) and protein/amino sugars (17% and 18%) species accounted higher proportions of HULIS. © 2021 Elsevier Ltd
关键词	Biomass burning EEM-PARAFAC FT-ICR MS HULIS UV–Vis spectrometer
语种	英语
scopus关键词	Biomass; Coal; Coal combustion; Correlation methods; Fluorescence; Light absorption; Optical properties; Organic carbon; Rural areas; Biomass-burning; Excitation-emission matrix-parallel factor model; FT-ICR MS; Humic-like substances; Molecular compositions; North China Plain; Optical-; PM$-2.5$; Property; UV-vis spectrometer; Mass spectrometry; aminosugar; coal; levoglucosan; lignin; organic carbon; protein; biochemical composition; chemical composition; coal combustion; concentration (composition); haze; humic substance; molecular analysis; optical property; particulate matter; rural area; spatiotemporal analysis; absorption; Article; biomass; chemical analysis; chemical composition; China; combustion; concentration (parameter); fluorescence intensity; fourier transform ion cyclotron resonance mass spectrometry; haze; humic substance; mathematical model; nitrogen cycling; particulate matter 2.5; physical chemistry; priority journal; rural area; ultraviolet visible spectroscopy; Area; Biomass; Coal; Combustion; Fluorescence; Light Absorption; Optical Properties; Water; China; Hebei; North China Plain
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248521
作者单位	Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; National Marine Environmental Monitoring Center, Dalian, 116023, China; Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai, 200234, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; National Joint Research Center for Tackling Key Problems in Air Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
推荐引用方式 GB/T 7714	Sun H.,Li X.,Zhu C.,et al. Molecular composition and optical property of humic-like substances (HULIS) in winter-time PM2.5 in the rural area of North China Plain[J],2021,252.
APA	Sun H..,Li X..,Zhu C..,Huo Y..,Zhu Z..,...&Chen J..(2021).Molecular composition and optical property of humic-like substances (HULIS) in winter-time PM2.5 in the rural area of North China Plain.ATMOSPHERIC ENVIRONMENT,252.
MLA	Sun H.,et al."Molecular composition and optical property of humic-like substances (HULIS) in winter-time PM2.5 in the rural area of North China Plain".ATMOSPHERIC ENVIRONMENT 252(2021).