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发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
2021-08-03
卷号55期号:15页码:10268-10279
关键词brown carbonFT-ICR-MSenvironmental parametersmachine learning approachesmolecular associationsGuangzhoubiomass burningOH radical
DOI10.1021/acs.est.1c01770
通讯作者Li, Jun(junli@gig.ac.cn)
英文摘要The 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.
资助机构Natural Science Foundation of China; Guangdong Foundation for Program of Science and Technology Research; State Key Laboratory of Organic Geochemistry, GIGCAS
收录类别SCI
语种英语
关键词[WOS]SEPARATED BROWN CARBON; BIOMASS BURNING AEROSOL; OPTICAL-PROPERTIES; MASS-SPECTROMETRY; SECONDARY; ORGANOSULFATES; OXIDATION; CONSTITUENTS; COMBUSTION; CHEMISTRY
研究领域[WOS]Engineering; Environmental Sciences & Ecology
WOS记录号WOS:000683363600008
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/29659
专题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
中科院海岸带环境过程与生态修复重点实验室
通讯作者Li, Jun作者单位1.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
推荐引用方式
GB/T 7714Jiang, 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.
APAJiang, 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.
MLAJiang, 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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