Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China
文献类型：期刊论文
| 作者 | Shen, Zhenxing2,3; Zheng, Chunli2; Zhu, Chongshu3; Zhao, Zhuzi3; Gao, Jinjin2; Huang, R. -J.3; Huang, Yu3; Lei, Yali2; Zhang, Leiming1; Cao, Junji3 |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 150期号:2017页码:322-330 |
| 关键词 | Brown Carbon Absorption Coefficient Mass Absorption Coefficient Secondary Organic Carbon |
| DOI | 10.1016/j.atmosenv.2016.11.024 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | MASS ABSORPTION EFFICIENCY ; AEROSOL LIGHT-ABSORPTION ; FINE PARTICULATE MATTER ; ORGANIC-CARBON ; BLACK CARBON ; SEASONAL-VARIATIONS ; BIOMASS COMBUSTION ; ELEMENTAL CARBON ; NORTHWEST CHINA ; SOLAR-RADIATION |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000392770700031 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5537]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 作者单位 | 1.Environm & Climate Change Canada, Sci & Technol Branch, Air Qual Res Div, Toronto, ON, Canada 2.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710049, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Zhenxing,Zheng, Chunli,Zhu, Chongshu,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.,Zheng, Chunli.,Zhu, Chongshu.,Zhao, Zhuzi.,Gao, Jinjin.,...&Yin, Xiuli.(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. |
入库方式： OAI收割
来源：地球环境研究所
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