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Characterization of parent and oxygenated-polycyclic aromatic hydrocarbons (PAHs) in Xi'an, China during heating period: An investigation of spatial distribution and transformation
Wang, Jingzhi1,2,3; Ho, Steven Sai Hang1,2,4; Huang, Rujin1,2,5; Gao, Meiling6; Liu, Suixin1,2; Zhao, Shuyu1,2; Cao, Junji1,2,7; Wang, Gehui1,2; Shen, Zhenxing7; Han, Yongming1,2
2016-09-01
Source PublicationCHEMOSPHERE
Volume159Issue:2016Pages:367-377
SubtypeArticle
AbstractPolycyclic aromatic hydrocarbons (PAHs) and its oxygenated derivatives (OPAHs) are toxins in PM2.5. Little information has been known for their transformation in the ambient airs. In this study, PM2.5 samples were collected at 19 sampling sites in Xi'an, China during the heating period, which is classified into: urban residential, university, commercial area, suburban region, and industry. Organic compounds including PAHs, OPAHs, hopanes and cholestanes were quantified. The average of total quantified PAHs and OPAHs concentrations were 196.5 ng/m(3) and 29A ng/m(3), respectively, which were consistent with other northern cities in China. Statistical analyses showed that there were significant differences on the distributions of PAHs between urban and suburban regions. The industry also had distinguishable profiles compared with urban residential and commercial area for OPAHs. The greater diversity of OPAHs than PAHs might be due to different primary emission sources and transformation and degradation pathways. The ratios of OPAHs to the corresponding parent PAHs, including 9-fluorenone/fluorene, anthraquinone/anthracene, benz[alpha]anthracene-7,12-dione/benzo[alpha]anthracene were 6.2, 12.7, and 1.4, respectively, which were much higher than those for the fresh emissions from coal combustion and biomass burning. These prove the importance of secondary formation and transformation of OPAHs in the ambient airs. Biomarkers such as retene, cyclopenta[CD]pyrene and alpha alpha-homohopane were characterized for the source apportionment. With Positive Matrix Factorization (PMF) model analysis, biomass burning was recognized as the most dominant pollution sources for PAHs during the heading period, which accounted for a contribution of 37.1%. Vehicle emission (22.8%) and coal combustion (22.6%) were also contributors in Xi'an. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordPm2.5 Pahs Opahs Transformation Heating Period
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.chemosphere.2016.06.033
WOS KeywordPOSITIVE MATRIX FACTORIZATION ; GAS CHROMATOGRAPHY/MASS SPECTROMETRY ; ATMOSPHERIC PARTICULATE MATTER ; NONPOLAR ORGANIC-COMPOUNDS ; PORT THERMAL-DESORPTION ; SOURCE APPORTIONMENT ; AMBIENT AIR ; N-ALKANES ; VERTICAL-DISTRIBUTION ; SEASONAL-VARIATIONS
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000380417800045
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5668
Collection粉尘与环境研究室
Affiliation1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian, Peoples R China
3.Shaanxi Normal Univ, Coll Tourism & Environm, Xian, Peoples R China
4.Desert Res Inst, Div Atmospher Sci, Reno, NV USA
5.Paul Scherrer Inst, Lab Atmospher Chem, CH-5232 Villigen, Switzerland
6.Univ Calif Berkeley, Sch Publ Hlth, Environm Hlth Sci Div, 50 Univ Hall 7360, Berkeley, CA 94720 USA
7.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jingzhi,Ho, Steven Sai Hang,Huang, Rujin,et al. Characterization of parent and oxygenated-polycyclic aromatic hydrocarbons (PAHs) in Xi'an, China during heating period: An investigation of spatial distribution and transformation[J]. CHEMOSPHERE,2016,159(2016):367-377.
APA Wang, Jingzhi.,Ho, Steven Sai Hang.,Huang, Rujin.,Gao, Meiling.,Liu, Suixin.,...&Han, Yongming.(2016).Characterization of parent and oxygenated-polycyclic aromatic hydrocarbons (PAHs) in Xi'an, China during heating period: An investigation of spatial distribution and transformation.CHEMOSPHERE,159(2016),367-377.
MLA Wang, Jingzhi,et al."Characterization of parent and oxygenated-polycyclic aromatic hydrocarbons (PAHs) in Xi'an, China during heating period: An investigation of spatial distribution and transformation".CHEMOSPHERE 159.2016(2016):367-377.
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