Molecular Signatures and Sources of Fluorescent Components in Atmospheric Organic Matter in South China

doi:10.1021/acs.estlett.2c00629

	Molecular Signatures and Sources of Fluorescent Components in Atmospheric Organic Matter in South China
	Jiang, Hongxing 1,2,3,4; Tang, Jiao 1,2,4; Li, Jun 1,2,4; Zhao, Shizhen 1,2,4; Mo, Yangzhi 1,2,4; Tian, Chongguo5 ; Zhang, Xiangyun 1,2,4; Jiang, Bin 1,2,4; Liao, Yuhong 1,2,4; Chen, Yingjun 3; Zhang, Gan 1,2,4
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
ISSN	2328-8930
	2022-10-18
页码	8
关键词	fluorescence components FT-ICR MS PARAFAC positive and negative ESI Brown carbon sources
DOI	10.1021/acs.estlett.2c00629
通讯作者	Li, Jun([email protected])
英文摘要	Excitation emission matrix (EEM) spectra coupled with parallel factor analysis (PARAFAC) have been used to characterize brown carbon (BrC). The molecular composition of PARAFAC components is not well understood in atmospheric science, which has impeded the accurate interpretation of the chemical changes and source apportionment of BrC using EEM-PARAFAC methods. We assigned numerous formulas identified by Fourier transform ion cyclotron resonance mass spectrometry (both negative and positive electrospray ionization modes) to each PARAFAC-derived fluorescent component (FC) in atmospheric PM2.5 samples. Obvious differences in molecular characteristics and sources were observed between atmospheric and hydrospheric FCs, indicating the need for caution in explaining the composition and source of atmospheric FC based on hydrospheric FC. Previously assigned protein-like components (C4) and less-oxidized humic-like FC (C1) were associated mainly with highly saturated photoresistant species and less-polar anthropogenic emissions. Highly oxidized humic-like FCs were associated with aromatic and highly unsaturated/phenolic compounds (high oxygen), which were potentially influenced by biomass burning and related secondary processes. The seasonal variations in light absorption were similar to those of fluorescence intensity and the degree of humification, which were influenced by highly unsaturated/phenolic compounds (high oxygen). These linkages indicated the potential of EEM-PARAFAC for investigating the changes of light absorption, molecular composition, and source of BrC.
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Guangdong Foundation for Program of Science and Technology Research
收录类别	SCI
语种	英语
关键词[WOS]	PEARL RIVER DELTA ; RESOLUTION MASS-SPECTROMETRY ; HUMIC-LIKE SUBSTANCES ; OPTICAL-PROPERTIES ; LIGHT-ABSORPTION ; AEROSOL COMPOSITION ; BROWN CARBON ; URBAN ; MARINE ; SPECTROSCOPY
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
WOS记录号	WOS:000874620900001
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/37254
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	Li, Jun
作者单位	1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou 510640, Peoples R China 3.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai 200433, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 5.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Hongxing,Tang, Jiao,Li, Jun,et al. Molecular Signatures and Sources of Fluorescent Components in Atmospheric Organic Matter in South China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS,2022:8.
APA	Jiang, Hongxing.,Tang, Jiao.,Li, Jun.,Zhao, Shizhen.,Mo, Yangzhi.,...&Zhang, Gan.(2022).Molecular Signatures and Sources of Fluorescent Components in Atmospheric Organic Matter in South China.ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS,8.
MLA	Jiang, Hongxing,et al."Molecular Signatures and Sources of Fluorescent Components in Atmospheric Organic Matter in South China".ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2022):8.