成都市夏冬季大气胺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 in urban Chengdu to analyze atmospheric amine-containing particles during summer and winter. Seven major single particle types were resolved with the ART-2a algorithm and manual merging, and their contribution to the total amine-containing particles presented obviously seasonal difference with particles from burning sources (such as EC particles) exhibiting high contribution in summer while aged organic particles (OCa) in winter. The analysis on the differential mass spectrum between two seasons confirmed that the particles from burning sources and the aged particles dominated amine-containing particles in summer and winter, respectively. In summer, the proportion of amine-containing particles showed low values at noon due to decomposition under high temperature, and increased obviously in the afternoon as a result of biomass burning. However, the proportion of amine-containing particles in daytime was higher than that at night in winter. With the aggravation of pollution, the number of amine-containing particles increased rapidly in the two seasons. EC particles increased most in summer and accounted for 47% of the total amine-containing particles when pollution was most serious. While in winter, the contribution of aged OCa particles increased significantly, reaching 37% when PM_2.5 was higher than 200μg/m³. Therefore, the formation mechanisms and physicochemical characteristics of amine-containing particles in Chengdu are greatly different between seasons due to the variations in sources and climatic conditions.

Key words： amine-containing particles seasonal difference evolution single particle aerosol mass spectrometer (SPAMS) Chengdu

Received: 29 January 2019

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X513

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	Articles by authors
	ZHANG Jun-ke
	LUO Bin
	ZHANG Wei
	RAO Zhi-han
	SONG Hong-yi

Cite this article:

ZHANG Jun-ke,LUO Bin,ZHANG Wei等. Single-particle characterization of amine-containing particles during summer and winter in Chengdu[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3152-3160.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3152

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