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Molecular characteristics of organic compositions in fresh and aged biomass burning aerosols
Li, Jianjun1; Li, Jin1; Wang, Gehui2,3; Zhang, Ting1; Dai, Wenting1; Ho, Kin Fai4,5; Wang, Qiyuan1; Shao, Yue6; Wu, Can2,3; Li, Li1
Corresponding AuthorLi, Jianjun(lijj@ieecas.cn) ; Wang, Gehui(ghwang@geo.ecnu.edu.cn)
2020-11-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume741Pages:12
AbstractBiomass burning (BB) is the most important source of primary organic aerosols (OA) in the atmosphere that has significant impact on local/regional air quality and human health. However, few studies paid attention to the evolution of molecular characteristics of BB OA in the atmospheric aging processes. In this study, both fresh and aged PM2.5 aerosols from burning of rice, maize, and wheat straws were collected from a combined system of combustion chamber and oxidation flow reactor, and were analyzed for >100 organic species. The emission factors (EFs) of anhydrosugars and some fatty acids showed slight variations between fresh and aged samples, indicating that these compounds are relatively stable. However, the EFs of n-alkanes, fatty alcohols, and parent-PAHs decreased 8-57% from fresh to aged samples, suggesting that they can undergo further oxidation to form other organic materials in the atmosphere. Phthalic acids, nitrophenols and isoprene-derived products were mainly secondarily formed by aging processes. Thus their EFs increased by 2-23 times from fresh to aged samples. Levoglucosan was the most abundant individual organic tracer, and its EF varied slightly between fresh and aged samples, proving its indicative role on BB emission. Moreover, the ratio of vanillic acid to levoglucosan and p-hydroxybenzoic acid to levoglucosan increased 2-13 times from fresh to aged samples. Therefore they can be used to investigate the impact of aging processes on BB aerosols in the atmosphere. RO2 + HO2 pathway derived 2-methyltetrols (2MTs) predominated the EFs of isoprene-derived products (SOAi) in the fresh samples. However, RO2 + NO pathway derived 2-methylglyceric acid (2-MGA) increased by >30 times and became comparable with 2-MTs in aged particles. The ratio of 2-MGA/2-MTs increased from 0.06-0.27 in fresh samples to 0.94-1.18 in aged samples, be-cause the high loading of NOx in BB smoke enhanced the formation of SOAi through RO2 + NO reactions. (c) 2020 Elsevier B.V. All rights reserved.
KeywordMolecular composition Biomass burning Organic aerosol Atmospheric aging
DOI10.1016/j.scitotenv.2020.140247
WOS KeywordPOLYCYCLIC AROMATIC-HYDROCARBONS ; NORTH CHINA PLAIN ; LONG-RANGE TRANSPORT ; ATMOSPHERIC AEROSOLS ; SIZE DISTRIBUTION ; LIGHT-ABSORPTION ; DICARBOXYLIC-ACIDS ; DIURNAL-VARIATIONS ; EMISSION FACTORS ; SOURCE PROFILES
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41977332] ; National Natural Science Foundation of China[41773117] ; National Natural Science Foundation of China[91644102] ; National Natural Science Foundation of China[91543116] ; Key Research and Development Program of Shaanxi Province[2018-ZDXM3-01] ; Research Grant Council of The Hong Kong Special Administrative Region China, Theme-Based Research Scheme[T24-504/17-N] ; Youth Innovation Promotion Association CAS[2020407]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational Natural Science Foundation of China ; Key Research and Development Program of Shaanxi Province ; Research Grant Council of The Hong Kong Special Administrative Region China, Theme-Based Research Scheme ; Youth Innovation Promotion Association CAS
WOS SubjectEnvironmental Sciences
WOS IDWOS:000568813100006
PublisherELSEVIER
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15309
Collection粉尘与环境研究室
Corresponding AuthorLi, Jianjun; Wang, Gehui
Affiliation1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China
2.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai 200241, Peoples R China
3.Inst Ecochongming, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China
4.Chinese Univ Hong Kong, Jockey Club Sch Publ Hlth & Primary Care, Hong Kong, Peoples R China
5.Chinese Univ Hong Kong, Shenzhen Res Inst, Shenzhen Municipal Key Lab Hlth Risk Anal, Shenzhen, Peoples R China
6.Univ Wisconsin, Chem & Biol Engn Dept, Madison, WI USA
Recommended Citation
GB/T 7714
Li, Jianjun,Li, Jin,Wang, Gehui,et al. Molecular characteristics of organic compositions in fresh and aged biomass burning aerosols[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,741:12.
APA Li, Jianjun.,Li, Jin.,Wang, Gehui.,Zhang, Ting.,Dai, Wenting.,...&Li, Li.(2020).Molecular characteristics of organic compositions in fresh and aged biomass burning aerosols.SCIENCE OF THE TOTAL ENVIRONMENT,741,12.
MLA Li, Jianjun,et al."Molecular characteristics of organic compositions in fresh and aged biomass burning aerosols".SCIENCE OF THE TOTAL ENVIRONMENT 741(2020):12.
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