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Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi'an, Northwest China
Wang, Xin1,2,3; Shen, Zhenxing1,2; Zeng, Yaling1; Liu, Fobang3; Zhang, Qian1; Lei, Yali1; Xu, Hongmei1; Cao, Junji2; Yang, Liu1
2018-02-01
Source PublicationATMOSPHERE
Volume9Issue:2Pages:1-13
SubtypeArticle
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
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3390/atmos9020062
WOS KeywordPOLYCYCLIC AROMATIC-HYDROCARBONS ; FINE PARTICULATE MATTER ; CANCER-RISK ASSESSMENT ; URBAN ATMOSPHERE ; CHEMICAL-COMPOSITION ; SPATIAL-DISTRIBUTION ; SIZE DISTRIBUTION ; HUMAN HEALTH ; AEROSOL ; PM2.5
Indexed BySCI
Language英语
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000427507000028
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5200
Collection粉尘与环境研究室
Affiliation1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710049, Peoples R China
3.Max Planck Inst Chem, Multiphase Chem Dept, D-55128 Mainz, Germany
Recommended Citation
GB/T 7714
Wang, Xin,Shen, Zhenxing,Zeng, Yaling,et al. Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi'an, Northwest China[J]. ATMOSPHERE,2018,9(2):1-13.
APA Wang, Xin.,Shen, Zhenxing.,Zeng, Yaling.,Liu, Fobang.,Zhang, Qian.,...&Yang, Liu.(2018).Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi'an, Northwest China.ATMOSPHERE,9(2),1-13.
MLA Wang, Xin,et al."Day-Night Differences, Seasonal Variations and Source Apportionment of PM10-Bound PAHs over Xi'an, Northwest China".ATMOSPHERE 9.2(2018):1-13.
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