Decreasing effect and mechanism of FeSO4 seed particles on secondary organic aerosol in alpha-pinene photooxidation

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Decreasing effect and mechanism of FeSO4 seed particles on secondary organic aerosol in alpha-pinene photooxidation
	Chu, Biwu ; Liu, Yongchun ; Li, Junhua ; Takekawa, Hideto ; Liggio, John ; Li, Shao-Meng ; Jiang, Jingkun ; Hao, Jiming ; He, Hong
刊名	ENVIRONMENTAL POLLUTION
	2014
卷号	193 期号:1 页码:88-93
关键词	Secondary organic aerosol FeSO4 seed particle alpha-Pinene Decreasing effect Relative humidity
ISSN号	0269-7491
中文摘要	alpha-Pinene/NOx and alpha-pinene/HONO photooxidation experiments at varying humidity were conducted in smog chambers in the presence or absence of FeSO4 seed particles. FeSO4 seed particles decrease SOA mass as long as water was present on the seed particle surface, but FeSO4 seed particles have no decreasing effect on SOA under dryer conditions at 12% relative humidity (RH). The decreasing effect of FeSO4 seed particles on the SOA mass is proposed to be related to oxidation processes in the surface layer of water on the seed particles. Free radicals, including OH, can be formed from catalytic cycling of Fe2+ and Fe3+ in the aqueous phase. These radicals can react further with the organic products of alpha-pinene oxidation on the seed particles. The oxidation may lead to formation of smaller molecules which have higher saturation vapor pressures and favor repartitioning to the gas phase, and therefore, reduces SOA mass. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
WOS记录号	WOS:000341471300012
公开日期	2015-03-24
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9270]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Chu, Biwu,Liu, Yongchun,Li, Junhua,et al. Decreasing effect and mechanism of FeSO4 seed particles on secondary organic aerosol in alpha-pinene photooxidation[J]. ENVIRONMENTAL POLLUTION,2014,193(1):88-93.
APA	Chu, Biwu.,Liu, Yongchun.,Li, Junhua.,Takekawa, Hideto.,Liggio, John.,...&He, Hong.(2014).Decreasing effect and mechanism of FeSO4 seed particles on secondary organic aerosol in alpha-pinene photooxidation.ENVIRONMENTAL POLLUTION,193(1),88-93.
MLA	Chu, Biwu,et al."Decreasing effect and mechanism of FeSO4 seed particles on secondary organic aerosol in alpha-pinene photooxidation".ENVIRONMENTAL POLLUTION 193.1(2014):88-93.