Molecular Dynamics and Light Absorption Properties of Atmospheric Dissolved Organic Matter
Jiang, Hongxing1,2,3,4,5; Li, Jun1,2,3,4; Sun, Rong1,2,3,4,5; Tian, Chongguo6; Tang, Jiao1,2,4; Jiang, Bin1,2,3,4; Liao, Yuhong1,2,3,4; Chen, Chang-Er7,8; Zhang, Gan1,2,3,4
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
2021-08-03
Volume55Issue:15Pages:10268-10279
Keywordbrown carbon FT-ICR-MS environmental parameters machine learning approaches molecular associations Guangzhou biomass burning OH radical
DOI10.1021/acs.est.1c01770
Corresponding AuthorLi, Jun(junli@gig.ac.cn)
AbstractThe light-absorbing organic aerosol referred to as brown carbon (BrC) affects the global radiative balance. The linkages between its molecular composition and light absorption properties and how environmental factors influence BrC composition are not well understood. In this study, atmospheric dissolved organic matter (ADOM) in 55 aerosol samples from Guangzhou was characterized using Fourier transform ion cyclotron resonance mass spectrometry and light absorption measurements. The abundant components in ADOM were aliphatics and peptide-likes (in structure), or nitrogen- and sulfur-containing compounds (in elemental composition). The light absorption properties of ADOM were positively correlated with the levels of unsaturated and aromatic structures. Particularly, 17 nitrogen-containing species, which are identified by a random forest, characterized the variation of BrC absorption well. Aggregated boosted tree model and nonmetric multidimensional scaling analysis show that the BrC composition was largely driven by meteorological conditions and anthropogenic activities, among which biomass burning (BB) and OH radical were the two important factors. BrC compounds often accumulate with elevated BB emissions and related secondary processes, whereas the photolysis/photooxidation of BrC usually occurs under high solar radiance/(OH)-O-center dot concentration. This study first illuminated how environmental factors influence BrC at the molecular level and provided clues for the molecular-level research of BrC in the future.
Funding OrganizationNatural Science Foundation of China ; Guangdong Foundation for Program of Science and Technology Research ; State Key Laboratory of Organic Geochemistry, GIGCAS
Indexed BySCI
Language英语
WOS KeywordSEPARATED BROWN CARBON ; BIOMASS BURNING AEROSOL ; OPTICAL-PROPERTIES ; MASS-SPECTROMETRY ; SECONDARY ; ORGANOSULFATES ; OXIDATION ; CONSTITUENTS ; COMBUSTION ; CHEMISTRY
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS IDWOS:000683363600008
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/29659
Collection海岸带生物学与生物资源利用重点实验室_海岸带生物资源高效利用研究与发展中心
中国科学院海岸带环境过程与生态修复重点实验室
Corresponding AuthorLi, Jun
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Poll, Guangzhou 510640, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
7.South China Normal Univ, Environm Res Inst, Sch Environm, Guangdong Prov Key Lab Chem Pollut & Environm Saf, Guangzhou 510006, Peoples R China
8.South China Normal Univ, MOE Key Lab Theoret Chem Environm, Guangzhou 510006, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Hongxing,Li, Jun,Sun, Rong,et al. Molecular Dynamics and Light Absorption Properties of Atmospheric Dissolved Organic Matter[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(15):10268-10279.
APA Jiang, Hongxing.,Li, Jun.,Sun, Rong.,Tian, Chongguo.,Tang, Jiao.,...&Zhang, Gan.(2021).Molecular Dynamics and Light Absorption Properties of Atmospheric Dissolved Organic Matter.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(15),10268-10279.
MLA Jiang, Hongxing,et al."Molecular Dynamics and Light Absorption Properties of Atmospheric Dissolved Organic Matter".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.15(2021):10268-10279.
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