IEECAS OpenIR  > 粉尘与环境研究室
Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi’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)3; Lei, YL(Lei, Yali)1; Xu, HM(Xu, Hongmei)1; Cao, JJ(Cao, Junji)2; Yang, L(Yang, Liu)1; Shen, Zhenxing
2018-06
Source Publicationatmosphere
Volume22Issue:2018Pages:10-19
Other AbstractDay-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
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5264
Collection粉尘与环境研究室
Corresponding AuthorShen, Zhenxing
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),Shen, ZX(Shen, Zhenxing),Zeng, YL(Zeng, Yaling),等. Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi’an, Northwest China[J]. atmosphere,2018,22(2018):10-19.
APA Wang,X.,Shen, ZX.,Zeng, YL.,Liu, FB.,Zhang, Q.,...&Shen, Zhenxing.(2018).Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi’an, Northwest China.atmosphere,22(2018),10-19.
MLA Wang,X,et al."Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi’an, Northwest China".atmosphere 22.2018(2018):10-19.
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