Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| 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
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| 2017-02-01 | |
| Source Publication | ATMOSPHERIC ENVIRONMENT
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| ISSN | 1352-2310 |
| Volume | 150Pages:322-330 |
| Abstract | 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. |
| Subtype | Article |
| Keyword | Brown Carbon Absorption Coefficient Mass Absorption Coefficient Secondary Organic Carbon |
| WOS Headings | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| DOI | 10.1016/j.atmosenv.2016.11.024 |
| WOS Subject Extended | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS Keyword | MASS ABSORPTION EFFICIENCY ; AEROSOL LIGHT-ABSORPTION ; FINE PARTICULATE MATTER ; ORGANIC-CARBON ; BLACK CARBON ; SEASONAL-VARIATIONS ; BIOMASS COMBUSTION ; ELEMENTAL CARBON ; NORTHWEST CHINA ; SOLAR-RADIATION |
| Indexed By | SCI |
| Language | 英语 |
| Funding Organization | National Natural Science Foundation of China(41573101) ; Natural Science Foundation of Shaanxi Province, China(2016ZDJC-22) ; Fundamental Research Funding for Central Universities in China(xkjc2015002) ; Key Lab of Aerosol Chemistry & Physics of the Chinese Academy of Sciences(KLACP201501) |
| WOS Subject | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS ID | WOS:000392770700031 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/14028 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Shen, Zhenxing |
| Affiliation | 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 |
| Recommended Citation GB/T 7714 | 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,2017,150:322-330. |
| 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,150,322-330. |
| MLA | Shen, Zhenxing,et al."Optical properties and possible sources of brown carbon in PM2.5 over Xi'an, China".ATMOSPHERIC ENVIRONMENT 150(2017):322-330. |
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