中国望都地区夏季大气气溶胶挥发性特征

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Abstract

Thermal denuder-aerosol mass spectrometer (TD-AMS) system was utilized to measure the aerosol chemical composition and volatility in the summer of 2014 in Wangdu, a rural site in North China Plain, and data of two different episodes were collected:average PM₁ mass concentration of relatively low pollution episodes (ep1) was (23.3 ±15.1)·g/m³, dominated by sulfate, mainly influenced by air masses from the north; while (86.6 ±19.7)·g/m³ during high pollution episodes (ep2), dominated by organics aerosol (OA), influenced by air masses from the south; the volatility sequence of chemical species was nitrate > chloride > ammonia > organic matter>sulfate; when compared with ep1, during ep2, sulfate had a higher contribution for PM₁ and was less volatile, and nitrate was more volatile; OA during ep2 was less oxidized and showed lower volatility, indicating it was more aged. The semi-volatility of atmospheric aerosol suggested that regional transport played a key role under high pollution conditions in North China during summer.

Key words： aerosol volatility thermal denuder TD-AMS organic aerosol

Received: 28 January 2019

PACS:

X513

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	Articles by authors
	WEI Lin-tong
	CAO Li-ming
	WEI Jing
	HE Ling-yan
	HUANG Xiao-feng

Cite this article:

WEI Lin-tong,CAO Li-ming,WEI Jing等. Characterization of atmospheric aerosol volatility in North China during summertime[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3647-3654.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I9/3647

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