Characterization of carbonaceous aerosol by the stepwise-extraction   thermal-optical-transmittance (SE-TOT) method

doi:10.1016/j.atmosenv.2012.05.010

CORC > 北京大学 > 环境科学与工程学院

	Characterization of carbonaceous aerosol by the stepwise-extraction thermal-optical-transmittance (SE-TOT) method
	Cheng, Yuan ; He, Ke-bin ; Duan, Feng-kui ; Du, Zhen-yu ; Zheng, Mei ; Ma, Yong-liang
刊名	大气环境
	2012
关键词	Carbonaceous aerosol SOA Brown carbon Biomass burning SECONDARY ORGANIC AEROSOL LIGHT-ABSORPTION MEASUREMENTS SOUTHEASTERN UNITED-STATES ELEMENTAL CARBON SOURCE APPORTIONMENT BLACK CARBON CHEMICAL-COMPOSITION PARTICULATE MATTER MASS-SPECTROMETER AMBIENT AEROSOL
DOI	10.1016/j.atmosenv.2012.05.010
英文摘要	Carbonaceous aerosol collected in Beijing, China was characterized by a stepwise-extraction thermal-optical-transmittance (SE-TOT) method which allows for a quantitative separation of organic aerosol into distinct fractions. About 55% of the total organic carbon (OC) could be extracted by a mixture of hexane, methylene chloride and acetone. The extractable OC was further isolated into non-polar, low-polar and high-polar OC which constituted 10%, 23% and 22% of the total OC, respectively. The sum of low-polar and high-polar OC was found to coincide well with the secondary OC predicted by the elemental carbon tracer method, indicating that the low-polar and high-polar OC are strongly associated with secondary organic aerosol. Moreover, it was suggested that high relative humidity could enhance the production of high-polar OC through aqueous-phase reactions, because high-polar OC correlated strongly with oxalate and the ratio of high-polar OC to low-polar OC was significantly higher during the sampling events with high relative humidity (1.23 +/- 0.35) comparing with results from the low relative humidity days (0.79 +/- 0.23). In addition, the extractable OC was shown to be light-absorbing. The results of this study suggest that the SE-TOT method could provide new insights into the characterization of carbonaceous aerosol. (C) 2012 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 3; ARTICLE; 551-558; 59
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/229526]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Cheng, Yuan,He, Ke-bin,Duan, Feng-kui,et al. Characterization of carbonaceous aerosol by the stepwise-extraction thermal-optical-transmittance (SE-TOT) method[J]. 大气环境,2012.
APA	Cheng, Yuan,He, Ke-bin,Duan, Feng-kui,Du, Zhen-yu,Zheng, Mei,&Ma, Yong-liang.(2012).Characterization of carbonaceous aerosol by the stepwise-extraction thermal-optical-transmittance (SE-TOT) method.大气环境.
MLA	Cheng, Yuan,et al."Characterization of carbonaceous aerosol by the stepwise-extraction thermal-optical-transmittance (SE-TOT) method".大气环境 (2012).