Chemical characterization of water-soluble organic carbon aerosols at a   rural site in the Pearl River Delta, China, in the summer of 2006

doi:10.1029/2009JD011736

CORC > 北京大学 > 环境科学与工程学院

	Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006
	Miyazaki, Y. ; Kondo, Y. ; Shiraiwa, M. ; Takegawa, N. ; Miyakawa, T. ; Han, S. ; Kita, K. ; Hu, M. ; Deng, Z. Q. ; Zhao, Y. ; Sugimoto, N. ; Blake, D. R. ; Weber, R. J.
刊名	journal of geophysical research atmospheres
	2009
关键词	HUMIC-LIKE SUBSTANCES ATMOSPHERIC AEROSOL OPTICAL-PROPERTIES MASS-SPECTROMETER SURFACE-TENSION AIR-POLLUTION EMISSIONS MATTER PARTICLES REGION
DOI	10.1029/2009JD011736
英文摘要	Online measurements of water-soluble organic carbon (WSOC) aerosols were made using a particle-into-liquid sampler (PILS) combined with a total organic carbon (TOC) analyzer at a rural site in the Pearl River Delta region, China, in July 2006. A macroporous nonionic (DAX-8) resin was used to quantify hydrophilic and hydrophobic WSOC, which are defined as the fractions of WSOC that penetrated through and retained on the DAX-8 column, respectively. Laboratory calibrations showed that hydrophilic WSOC (WSOCHPI) included low-molecular aliphatic dicarboxylic acids and carbonyls, saccharides, and amines, while hydrophobic WSOC (WSOCHPO) included longer-chain aliphatic dicarboxylic acids and carbonyls, aromatic acids, phenols, organic nitrates, cyclic acids, and fulvic acids. On average, total WSOC (TWSOC) accounted for 60% of OC, and WSOCHPO accounted for 60% of TWSOC. Both WSOCHPI and WSOCHPO increased with photochemical aging determined from the NOx/NOy ratio. In particular, the average WSOCHPO mass was found to increase by a factor of five within a timescale of similar to 10 hours, which was substantially larger than that of WSOCHPI (by a factor of 2-3). The total increase in OC mass with photochemical aging was associated with the large increase in WSOCHPO mass. These results, combined with the laboratory calibrations, suggest that significant amounts of hydrophobic organic compounds (likely containing large carbon numbers) were produced by photochemical processing. By contrast, water-insoluble OC (WIOC) mass did not exhibit significant changes with photochemical aging, suggesting that chemical transformation of WIOC to WSOC was not a dominant process for the production of WSOC during the study period.; Meteorology & Atmospheric Sciences; SCI(E); 28; ARTICLE; 114
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/246789]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Miyazaki, Y.,Kondo, Y.,Shiraiwa, M.,et al. Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006[J]. journal of geophysical research atmospheres,2009.
APA	Miyazaki, Y..,Kondo, Y..,Shiraiwa, M..,Takegawa, N..,Miyakawa, T..,...&Weber, R. J..(2009).Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006.journal of geophysical research atmospheres.
MLA	Miyazaki, Y.,et al."Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006".journal of geophysical research atmospheres (2009).