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Chemical composition of PM2.5 in an urban environment in Chengdu, China: Importance of springtime dust storms and biomass burning
Tao, J (Tao, Jun)[ 1,2 ]; Zhang, LM (Zhang, Leiming)[ 2,3 ]; Engling, G (Engling, Guenter)[ 4 ]; Zhang, RJ (Zhang, Renjian)[ 2 ]; Yang, YH (Yang, Yihong)[ 1 ]; Cao, JJ (Cao, Junji)[ 5 ]; Zhu, CS (Zhu, Chongshu)[ 5 ]; Wang, QY (Wang, Qiyuan)[ 5 ]; Luo, L (Luo, Lei)[ 6 ]
2013-03-30
Source PublicationATMOSPHERIC RESEARCH
Volume122Pages:270-283
Subtype期刊论文
Abstract

Daily PM2.5 samples were collected in Chengdu, a megacity in southwest China, for a period of one month in every season during 2009-2010. Mass concentrations of water-soluble inorganic ions, organic carbon (OC), elemental carbon (EC), levoglucosan (LC), water soluble organic carbon (WSOC), and elements were determined to identify the chemical characteristics and potential sources of PM2.5. The data obtained in spring were discussed in detail to explore the impacts of dust storms and biomass burning on the chemical aerosol properties. The daily PM2.5 mass concentrations ranged from 49.2 to 425.0 mu g m(-3) with an annual average of 165.1 +/- 85.1 mu g m(-3). The highest seasonal average of PM2.5 concentrations was observed in the winter (225.5 +/- 73.2 mu g m(-3)) and the lowest in the summer (113.5 +/- 39.3 mu g m(-3)). Dust storm influence was observed only during the spring, while biomass burning activities occurred frequently in late spring and early summer. In the spring season, water-soluble ions, total carbonaceous aerosols, and the sum of the dominant elements (Al, Si, Ca, Ti, Fe, Mn, Zn, Pb, and Cu) accounted for 30.0 +/- 9.3%, 38.6 +/- 11.4%, and 6.2 +/- 5.3%, respectively, of the total PM2.5 mass. Crustal element levels evidently increased during the dust storm episode and LG, OC, WSOC, Cl- and K+ concentrations increased by a factor of 2-7 during biomass burning episodes. Using the Positive Matrix Factorization (PMF) receptor model, four sources for spring aerosols were identified, including secondary sulfate and nitrate, motor vehicle emissions, soil dust, and biomass burning. The four sources were estimated to contribute 24.6%, 18.8%, 23.6% and 33.0%, respectively, to the total PM2.5 mass.

KeywordFine Particles Inorganic Ions Organic Carbon Levoglucosan Trace Elements Source Apportionment
DOI10.1016/j.atmosres.2012.11.004
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9998
Collection粉尘与环境研究室
Corresponding AuthorTao, J (Tao, Jun)[ 1,2 ]
Affiliation1.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;
2.RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;
3.Air Quality Research Division, Science Technology Branch, Environment Canada, Toronto, Canada;
4.Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan;
5.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China;
6.Institute of Plateau Meteorology, China Meteorological Administration, Chengdu, China
Recommended Citation
GB/T 7714
Tao, J ,Zhang, LM ,Engling, G ,et al. Chemical composition of PM2.5 in an urban environment in Chengdu, China: Importance of springtime dust storms and biomass burning[J]. ATMOSPHERIC RESEARCH,2013,122:270-283.
APA Tao, J .,Zhang, LM .,Engling, G .,Zhang, RJ .,Yang, YH .,...&Luo, L .(2013).Chemical composition of PM2.5 in an urban environment in Chengdu, China: Importance of springtime dust storms and biomass burning.ATMOSPHERIC RESEARCH,122,270-283.
MLA Tao, J ,et al."Chemical composition of PM2.5 in an urban environment in Chengdu, China: Importance of springtime dust storms and biomass burning".ATMOSPHERIC RESEARCH 122(2013):270-283.
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