Variations of fine particle physiochemical properties during a heavy   haze episode in the winter of Beijing

doi:10.1016/j.scitotenv.2016.07.147

CORC > 北京大学 > 环境科学与工程学院

	Variations of fine particle physiochemical properties during a heavy haze episode in the winter of Beijing
	Niu, Hongya ; Hu, Wei ; Zhang, Daizhou ; Wu, Zhijun ; Guo, Song ; Pian, Wei ; Cheng, Wenjing ; Hu, Min
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2016
关键词	Morphology Size Soot particles Secondary particles Core-shell structure Aging AEROSOL MASS-SPECTROMETRY NORTH CHINA PLAIN BLACK CARBON SECONDARY FORMATION CHEMICAL-COMPOSITION INORGANIC AEROSOLS RELATIVE-HUMIDITY ORGANIC AEROSOLS AGING TIMESCALE SOOT PARTICLES
DOI	10.1016/j.scitotenv.2016.07.147
英文摘要	Chemical composition, morphology, size and mixture of fine particles were measured in a heavy haze and the post-haze air in Beijing in January 2012. With the occurrence of haze, the concentrations of gaseous and particulate pollutants including organics, sulfate, nitrate, and ammonium grew gradually. The hourly averaged PM2.5 concentration increased from 118 mu g m(-3) to 402 mu g m(-3) within 12 h. In contrast, it was less than 10 mu g m(-3) in the post-haze air. Occupying approximately 46% in mass, organics were the major component of PM1 in both the haze and post-haze air. Analysis of individual particles in the size range of 0.2-1.1 mu m revealed that secondary-like particles and soot particles were always the majority, and most soot particles had a core-shell structure. The number ratio of secondary-like particles to soot particles in accumulation mode in the haze air was about 2:1, and that in the post-haze air was 8:1. These results indicate both secondary particle formation and primary emission contributed substantially to the haze. The mode size of the haze particles was about 0.7 mu m, and the mode size of the post-haze particles was 0.4 mu m, indicating the remarkable growth of particles in haze. However, the ratios of the core size to shell size of core-shell structure soot particles in the haze were similar to those in the post-haze air, suggesting a quick aging of soot particles in either the haze air or the post-haze air. (C) 2016 Elsevier B.V. All rights reserved.; National Basic Research Program of China [2013CB228503]; National Natural Science Foundation of China [91544214, 41541038]; Natural Science Foundation of Hebei Province [D2016402120]; Education Bureau of Hebei Province for Excellent Young Scholars [YQ2014020]; special fund of the State Key Joint Laboratory of Environment Simulation and Pollution Control [14K05ESPCP]; Chinese Scholarship Council (CSC); SCI(E); EI; PubMed; ARTICLE; minhu@pku.edu.cn; 103-109; 571
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/493399]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Niu, Hongya,Hu, Wei,Zhang, Daizhou,et al. Variations of fine particle physiochemical properties during a heavy haze episode in the winter of Beijing[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016.
APA	Niu, Hongya.,Hu, Wei.,Zhang, Daizhou.,Wu, Zhijun.,Guo, Song.,...&Hu, Min.(2016).Variations of fine particle physiochemical properties during a heavy haze episode in the winter of Beijing.SCIENCE OF THE TOTAL ENVIRONMENT.
MLA	Niu, Hongya,et al."Variations of fine particle physiochemical properties during a heavy haze episode in the winter of Beijing".SCIENCE OF THE TOTAL ENVIRONMENT (2016).