中国科学院重庆绿色智能技术研究院机构知识库

QQ客服 官方微博 反馈留言

	Atmospheric deposition of polycyclic aromatic compounds and associated sources in an urban and a rural area of Chongqing, China
	Tian, Mi1; Yang, FuMo1,2,3; Chen, SheJun4; Wang, HuanBo1; Chen, Yang1; Zhang, LiuYi1; Zhang, LeiMing5; Xiang, Li1; Qiao, BaoQing1
	2017-11-01
摘要	Monthly bulk (dry + wet) deposition samples were collected at an urban and a rural site in Chongqing, southwestern China during May 2014 to April 2015 for analyzing the contents of parent polycyclic aromatic hydrocarbons (PPAHs) and three types of substituted PAHs (SPAHs) including oxygenated PAHs (OPAHs), nitrated PAHs (NPAHs) and methyl PAHs (MPAHs). Annual average (standard deviation) deposition fluxes of Sigma PPAHs, Sigma OPAHs, and MPAHs were 536 +/- 216; 221 +/- 118, and 131 +/- 41.9 ng/m(2)/d, respectively, in the urban area, and 347 +/- 185, 160 +/- 112, and 85.2 +/- 32.0 ng/m(2)/d, respectively in the rural area. Deposition of MNPAHs (6.01 +/- 3.93 and 3.91 +/- 4.84 ng/m(2)/d) were about two orders of magnitude lower than those of EPPAHs. In the urban area, temporal variations of PPAHs and MPAHs fluxes were positively correlated with particle deposition, while the trends of OPAHs and NPAHs were probably controlled by secondary formation. In the rural area, SPAHs and PPAHs deposition fluxes had similar temporal trends but differed from particle deposition. High relative humidity in Chongqing likely played an important role in facilitating the partitioning of OPAHs to atmospheric aerosols and resulting in the relatively high OPAHs level in winter. Principle component analysis identified secondary formation (21.7%) and combustion emission (52.7%) as two important contributors to polycyclic aromatic compounds (PACs) deposition fluxes in urban area. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	Parent PAHs Nitrated PAHs Oxygenated PAHs Bulk atmospheric deposition Source identification
DOI	10.1016/j.chemosphere.2017.08.077
发表期刊	CHEMOSPHERE
ISSN	0045-6535
卷号	187页码:78-87
通讯作者	Yang, FM (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Atmospher Environm, Chongqing 400714, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000412618900010
语种	英语