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Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China
Shen, Zhenxing1,2; Zhang, Qian1; Cao, Junji2; Zhang, Leiming3; Lei, Yali1; Huang, Yu2; Huang, R. -J.2; Gao, Jinjin1; Zhao, Zhuzi2; Zhu, Chongshu2; Yin, Xiuli4; Zheng, Chunli1; Xu, Hongmei1; Liu, Suixin1
2017-02-01
发表期刊ATMOSPHERIC ENVIRONMENT
卷号150期号:2017页码:322-330
文章类型Article
摘要To quantify optical and chemical properties of PM2.5 brown carbon (BrC) in Xi'an, 58 high-volume ambient PM2.5 samples were collected during 2 November 2009 to 13 October 2010. Mass concentrations of chemical components were determined, including water-soluble ions, water-soluble organic carbon, levoglucosan, organic carbon (OC), and element carbon (EC). BrC, as an unidentified and wavelength-dependent organic compound, was also measured from water-soluble carbon (WSOC) at 340 nm using UV-vis spectrometer. The wavelength-dependent absorption coefficient (b(abs)) and mass absorption coefficient (MAC) were much abundant at 340 nm, and the high Absorption Angstrom coefficient (AAC) values were observed around 5.4, corresponding to the existence of BrC in ambient PM2.5, especially in winter. Good correlations (R > 0.60) between b(abs) and biomass burning markers, such as levoglucosan and K+, in winter indicated significant amounts of primary BrC from biomass burning emissions. Secondary organic carbon BrC (SOC-BrC) was more abundant in winter than in summer. SOC-BrC in winter was mainly fresh SOC formed from aqueous phase reactions while in summer, aged SOC from photo-chemical formation. Source profiles of BrC optical parameters were detected, which verified sources of BrC from biomass burning and coal burning emissions in areas surrounding Xi'an. The rapidly decreasing b(abs-340nm) values from biomass burning smoldering to straw pellet burning suggested that burning straw pellet instead of burning straw directly is an effective measure for reducing BrC emissions. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Brown Carbon Absorption Coefficient Mass Absorption Coefficient Secondary Organic Carbon
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2016.11.024
关键词[WOS]MASS ABSORPTION EFFICIENCY ; AEROSOL LIGHT-ABSORPTION ; FINE PARTICULATE MATTER ; ORGANIC-CARBON ; BLACK CARBON ; SEASONAL-VARIATIONS ; BIOMASS COMBUSTION ; ELEMENTAL CARBON ; NORTHWEST CHINA ; SOLAR-RADIATION
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000392770700031
引用统计
被引频次:15[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/361006/5537
专题粉尘与环境研究室
作者单位1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710049, Peoples R China
3.Environm & Climate Change Canada, Sci & Technol Branch, Air Qual Res Div, Toronto, ON, Canada
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
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Shen, Zhenxing,Zhang, Qian,Cao, Junji,et al. Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China[J]. ATMOSPHERIC ENVIRONMENT,2017,150(2017):322-330.
APA Shen, Zhenxing.,Zhang, Qian.,Cao, Junji.,Zhang, Leiming.,Lei, Yali.,...&Liu, Suixin.(2017).Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China.ATMOSPHERIC ENVIRONMENT,150(2017),322-330.
MLA Shen, Zhenxing,et al."Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China".ATMOSPHERIC ENVIRONMENT 150.2017(2017):322-330.
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