Technical Note: The application of an improved gas and aerosol collector   for ambient air pollutants in China

doi:10.5194/acp-12-10519-2012

CORC > 北京大学 > 环境科学与工程学院

	Technical Note: The application of an improved gas and aerosol collector for ambient air pollutants in China
	Dong, H-B. ; Zeng, L-M. ; Hu, M. ; Wu, Y-S. ; Zhang, Y-H. ; Slanina, J. ; Zheng, M. ; Wang, Z-F. ; Jansen, R.
刊名	atmospheric chemistry and physics
	2012
关键词	PEARL RIVER DELTA NITROUS-ACID HONO SEMICONTINUOUS PM2.5 SULFATE CHEMICAL-COMPOSITION MASS-SPECTROMETER RURAL SITE HIGH-RESOLUTION SULFUR-DIOXIDE NITRATE PARTICULATE
DOI	10.5194/acp-12-10519-2012
英文摘要	An improved Gas and Aerosol Collector (GAC) equipped with a newly designed aerosol collector and a set of dull-polished wet annular denuder (WAD) was developed based on a Steam Jet Aerosol Collector (SJAC) sampler. Combined with Ion Chromatography (IC) the new sampler performed well in laboratory tests with high collection efficiencies for SO2 (above 98 %) and particulate sulfate (as high as 99.5 %). An inter-comparison between the GAC-IC system and the filter-pack method was performed and the results indicated that the GAC-IC system could supply reliable particulate sulfate, nitrate, chloride, and ammonium data in field measurement with a much wider range of ambient concentrations. When applied in two major field campaigns (rural and coastal sites) in China, the GAC-IC system provided high-quality data in ambient conditions even under high loadings of pollutants. Its measurements were highly correlated with data by other commercial instruments such as the SO2 analyzer (43c, Thermo-Fisher, USA; R-2 as 0.96), the HONO analyzer (LOPAP, Germany; R-2 as 0.91 for samples from 15: 00 to 07: 00), a filter sampler (Tianhong, China; R-2 as 0.86 for SO42-), and Aerosol Mass Spectrometer (AMS, Aerodyne, USA; R-2 above 0.77 for major species) over a wide range of concentrations. Through the application of the GAC-IC system, it was identified that 70% of chloride and nitrate by the filter method could be lost during daytime sampling due to high temperature in the rural site of Kaiping. In Changdao field campaign (coastal site), though a particle dryer was applied, its drying efficiency was not well considered for the collection efficiency of AMS seemed still interfered a bit by local high relative humidity. If the inter-comparison was done with relative humidity below 50 %, the correlations ranged from 0.81 to 0.94 for major species. Through laboratory and field studies, this instrument is proved particularly useful in future intensive campaigns or long-term monitoring stations to study various environmental issues such as secondary aerosol and haze formation, as well as climate change.; Meteorology & Atmospheric Sciences; SCI(E); 0; ARTICLE; 21; 10519-10533; 12
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/324431]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Dong, H-B.,Zeng, L-M.,Hu, M.,et al. Technical Note: The application of an improved gas and aerosol collector for ambient air pollutants in China[J]. atmospheric chemistry and physics,2012.
APA	Dong, H-B..,Zeng, L-M..,Hu, M..,Wu, Y-S..,Zhang, Y-H..,...&Jansen, R..(2012).Technical Note: The application of an improved gas and aerosol collector for ambient air pollutants in China.atmospheric chemistry and physics.
MLA	Dong, H-B.,et al."Technical Note: The application of an improved gas and aerosol collector for ambient air pollutants in China".atmospheric chemistry and physics (2012).