The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties

doi:10.5194/acp-20-2017-2020

IEECAS OpenIR > 粉尘与环境研究室

	The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties
	Wu, Can 1,2; Wang, Gehui 1,2,3,4; Li, Jin 2; Li, Jianjun 2; Cao, Cong 2; Ge, Shuangshuang 1; Xie, Yuning 1; Chen, Jianmin 3,5; Li, Xingru 1,6; Xue, Guoyan 1; Wang, Xinpei 1; Zhao, Zhuyu 7; Cao, Fang 7
通讯作者	Wang, Gehui(ghwang@geo.ecnu.edu.cn)
	2020-02-21
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
卷号	20 期号:4 页码:2017-2030
摘要	To investigate the characteristics of atmospheric brown carbon (BrC) in the semiarid region of East Asia, PM2.5 and size-resolved particles in the urban atmosphere of Xi'an, inland China, during the winter and summer of 2017 were collected and analyzed for optical properties and chemical compositions. Methanol extracts (MeOH extracts) were more light-absorbing than water extracts (H2O extracts) in the optical wavelength of 300-600 nm and well correlated with nitrophenols, polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (r > 0.78). The light absorptions (abs(lambda=365 nm)) of H2O extracts and MeOH extracts in winter were 28 +/- 16 and 49 +/- 32Mm(-1), respectively, which are about 10 times higher than those in summer, mainly due to the enhanced emissions from biomass burning for house heating. Water-extracted BrC predominately occurred in the fine mode (< 2.1 mu m) during winter and summer, accounting for 81% and 65% of the total absorption of BrC, respectively. The light absorption and stable carbon isotope composition measurements showed an increasing ratio of abs(lambda=365 nm)-MeOH to abs(lambda=550 nm)-EC along with an enrichment of C-13 in PM2.5 during the haze development, indicating an accumulation of secondarily formed BrC (e.g., nitro-phenols) in the aerosol aging process. Positive matrix factorization (PMF) analysis showed that biomass burning, fossil fuel combustion, secondary formation, and fugitive dust are the major sources of BrC in the city, accounting for 55 %, 19 %, 16 %, and 10% of the total BrC of PM2.5, respectively.
DOI	10.5194/acp-20-2017-2020
关键词[WOS]	POLYCYCLIC AROMATIC-HYDROCARBONS ; SECONDARY ORGANIC AEROSOL ; BIOMASS-BURNING AEROSOL ; LIGHT-ABSORPTION PROPERTIES ; CHEMICAL CHARACTERISTICS ; SOURCE APPORTIONMENT ; BLACK CARBON ; MOLECULAR CHARACTERIZATION ; SEASONAL-VARIATIONS ; POTENTIAL SOURCES
收录类别	SCI ; SCI
语种	英语
资助项目	National Nature Science Foundation of China[41773117] ; [2017YFC0210000]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Nature Science Foundation of China
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000516713800004
出版者	COPERNICUS GESELLSCHAFT MBH
引用统计	被引频次：47[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12743
专题	粉尘与环境研究室
通讯作者	Wang, Gehui
作者单位	1.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai 210062, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Phys & Chem, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Inst Ecochongming, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Fudan Univ, Dept Environm Sci & Technol, Shanghai 200433, Peoples R China 6.Capital Normal Univ, Analyt & Testing Ctr, Dept Chem, Beijing 100048, Peoples R China 7.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Peoples R China
推荐引用方式 GB/T 7714	Wu, Can,Wang, Gehui,Li, Jin,et al. The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(4):2017-2030.
APA	Wu, Can.,Wang, Gehui.,Li, Jin.,Li, Jianjun.,Cao, Cong.,...&Cao, Fang.(2020).The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(4),2017-2030.
MLA	Wu, Can,et al."The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.4(2020):2017-2030.