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Day-Night Differences, Seasonal Variations andSource Apportionment of PM10-Bound PAHs overXi’an, Northwest China
Wang, X (Wang, Xin)[ 1,2,3 ]; Shen, ZX (Shen, Zhenxing)[ 1,2 ]; Zeng, YL (Zeng, Yaling)[ 1 ]; Liu, FB (Liu, Fobang)[ 3 ]; Zhang, Q (Zhang, Qian)[ 1 ]; Lei, YL (Lei, Yali)[ 1 ]; Xu, HM (Xu, Hongmei)[ 1 ]; Cao, JJ (Cao, Junji)[ 2 ]; Yang, L (Yang, Liu)[ 1 ]
2018-02
Source Publicationatmosphere
Volume9Issue:2Pages:62
Subtype期刊论文
Abstract

Day-night PM10-bound PAHs were studied at an urban site of Xi’an from 20 December 2006 to 28 October 2007. The annual mean concentration of nighttime PAHs (285.0 ng m−3) was higher than that in daytime (239.4 ng m−3). A significant difference of PAH concentrations between daytime and nighttime was found in autumn with a coefficient of divergence (CD) of 0.23 (significant level 0.2). However, no distinct difference was observed in other seasons (with CD values < 0.2), although the difference of PAHs partition capacity in PM10 between daytime and nighttime was significant in the four seasons. Remarkable seasonal variations were observed in the total PAH levels, with a highest mean concentration of 344.6 ng m−3 in winter and a lowest mean concentration of 177 ng m−3 in summer. Positive matrix factorization results revealed that residential emission for heating is the major contributor of the elevated PAH levels in winter, accounting for 49% of the total PAH levels. The coal combustion including industrial and residential usage, contributed over 40% of the PAH emissions in PM10 of Xi’an during the one-year sampling period. These results can provide guidance for taking measures in reducing PAHs levels in the air.

KeywordPm10 Pahs Day-night Difference Seasonal Variation Positive Matrix Factorization Northwest China
DOI10.3390/atmos9020062
Indexed BySCI
Language英语
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9548
Collection粉尘与环境研究室
Affiliation1.Department of Environmental Sciences and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences,Xi’an 710049, China;
3.Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Recommended Citation
GB/T 7714
Wang, X (Wang, Xin)[ 1,2,3 ],Shen, ZX (Shen, Zhenxing)[ 1,2 ],Zeng, YL (Zeng, Yaling)[ 1 ],等. Day-Night Differences, Seasonal Variations andSource Apportionment of PM10-Bound PAHs overXi’an, Northwest China[J]. atmosphere,2018,9(2):62.
APA Wang, X .,Shen, ZX .,Zeng, YL .,Liu, FB .,Zhang, Q .,...&Yang, L .(2018).Day-Night Differences, Seasonal Variations andSource Apportionment of PM10-Bound PAHs overXi’an, Northwest China.atmosphere,9(2),62.
MLA Wang, X ,et al."Day-Night Differences, Seasonal Variations andSource Apportionment of PM10-Bound PAHs overXi’an, Northwest China".atmosphere 9.2(2018):62.
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