Enhanced formation of fine particulate nitrate at a rural site on the   North China Plain in summer: The important roles of ammonia and ozone

doi:10.1016/j.atmosenv.2014.11.037

CORC > 北京大学 > 环境科学与工程学院

	Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone
	Wen, Liang ; Chen, Jianmin ; Yang, Lingxiao ; Wang, Xinfeng ; Xu, Caihong ; Sui, Xiao ; Yao, Lan ; Zhu, Yanhong ; Zhang, Junmei ; Zhu, Tong ; Wang, Wenxing
刊名	大气环境
	2015
关键词	Fine particulate nitrates Secondary formation Ammonia Ozone North China Plain BEIJING OLYMPICS HAZE EPISODES AIR-QUALITY PM2.5 WATER AEROSOL SHANGHAI URBAN NO2 POLLUTANTS
DOI	10.1016/j.atmosenv.2014.11.037
英文摘要	Severe PM2.5 pollution was observed frequently on the North China Plain, and nitrate contributed a large fraction of the elevated PM2.5 concentrations. To obtain a comprehensive understanding of the formation pathways of these fine particulate nitrate and the key factors that affect these pathways, field measurements of fine particulate nitrate and related air pollutants were made at a rural site on the North China Plain in the summer of 2013. Extremely high concentrations of fine particulate nitrate were frequently observed at night and in the early morning. The maximum hourly concentration of fine particulate nitrate reached 87.2 mu g m(-3). This concentration accounted for 29.9% of the PM2.5. The very high NH3 concentration in the early morning significantly accelerated the formation of fine particulate nitrate, as indicated by the concurrent appearance of NH3 and NO3- concentration peaks and a rising neutralization ratio (the equivalent ratio of NH4+ to the sum of SO42- and NO3-). On a number of other episode days, strong photochemical activity during daytime led to high concentrations of O-3 at night. The fast secondary formation of fine particulate nitrate was mainly attributed to the hydrolysis of N2O5, which was produced from O-3 and NO2. Considering the important roles of NH3 and O-3 in fine particulate nitrate formation, we suggest the control of NH3 emissions and photochemical pollution to address the high levels of fine particulate nitrate and the severe PM2.5 pollution on the North China Plain. (C) 2014 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000348017000030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 18; ARTICLE; yanglingxiao@sdu.edu.cn; 294-302; 101
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206620]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wen, Liang,Chen, Jianmin,Yang, Lingxiao,et al. Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone[J]. 大气环境,2015.
APA	Wen, Liang.,Chen, Jianmin.,Yang, Lingxiao.,Wang, Xinfeng.,Xu, Caihong.,...&Wang, Wenxing.(2015).Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone.大气环境.
MLA	Wen, Liang,et al."Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone".大气环境 (2015).