北京市远郊冬季铵盐颗粒物的单颗粒质谱研究

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Abstract

A Single Particle Aerosol Mass Spectrometer (SPAMS) was deployed on a rural site of Beijing during the winter of 2016. Ammonium-containing particles were identified using the ion signal peaking at m/z 18, and their temporal variation, size distribution, mixing state, and possible source of ammonium-containing particles were analyzed. Approximately 31% of particles in the SPAMS dataset were identified as ammonium-containing particles. Using an ART-2a clustering algorithm, the ammonium-containing particle dataset could be clustered to seven major particles types, such as NH₄-OC(49.9%), NH₄-EC(5.6%), NH₄-ECOC(8.9%), NH₄-HOC(1.4%), NH₄-K(9.3%), NH₄-NaK(21.7%), and NH₄-FeK(2.5%). Ammonium, which internally mixed with carbonaceous particles, existed in the form of ammonium sulfate, ammonium bisulfate, and ammonium nitrate. Coal and biomass burning were the major sources of ammonium-containing particles. During the clear period, air masses transport from the north and northwest of the sampling site; while during the haze period, air masses were mainly from the northwest. The potential source contribution function (PSCF) analysis showed that the ammonium-containing particles were mainly from local and regional emissions near the sampling site, and from the long-range transport in the northwest.

Key words： ammonium-containing particle single particle mixing state source apportionment

Received: 09 November 2017

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Corresponding Authors: 陈阳,副研究员,chenyang@cigit.ac.cn;杨复沫,研究员,fmyang@cigit.ac.cn E-mail: chenyang@cigit.ac.cn;fmyang@cigit.ac.cn

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	Articles by authors
	WANG Zhi-chao
	CHEN Yang
	YANG Fu-mo
	WANG Huan-bo
	TIAN Mi
	SHI Guang-ming

Cite this article:

WANG Zhi-chao,CHEN Yang,YANG Fu-mo等. Single-particle characterization of ammonium-containing particles during wintertime in suburb of Beijing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2012-2021.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2012

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