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《Environmental Science》 2007-01
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Monitoring of Polycyclic Aromatic Hydrocarbons in the Atmosphere of China Cities Using PUF-Passive Air Sampler

LIU Xiang~(1,6),ZHANG Gan~1,LI Jun~1,YU Li-li~1,QI Shi-hua~2,ZOU Shi-chun~3,GUO Zhi-gang~4,ZHAO Yu-cheng~5(1.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Science,Guangzhou 510640,China;2.Faculty of Environment Sciences,China University of Geosciences,Wuhan 430074,China;3.School of Chemistry & Chemical Engineering,Sun Yat-sen University,Guangzhou 510250,China;4.School of Geosciences & Environment,Ocean University of China,Qingdao 266003,China;5.Global Atmospheric Baseline Monitoring Stations in Waliguan of China,Xining 810001,China;6.Graduate School of Chinese Academy of Sciences,Beijing 100039,China)  
A national-wide survey of polycyclic aromatic hydrocarbons(PAHs) in the atmosphere was conducted in 32 cities in China during winter and spring,respectively,in 2005.Polyurethane foam passive samplers(PUF-PAS) were used to collect PAHs in the atmosphere.The results show that PUF-PAS may not only absorb 2~3 ring PAHs and part of 4 ring PAHs,which mainly exist in vapor phases,but is also able to retain 5~7 ring PAHs mostly associated with atmospheric particulates.Higher concentrations of total PAHs and high molecular weight PAHs were observed in the cities located in northwestern,northern,southwestern and central China,while relatively low PAH concentrations were found in cities located in southern China and/or along the eastern coastal regions.By comparing the two seasons,PAH concentrations in winter are higher than in spring.Geographical location,climate and energy consumption patterns were found to be the main factors influencing the concentrations and profiles of PAH in the urban air.Molecular markers indicated that the PAHs in urban air were mainly resulted from incomplete combustion of fossil fuel.Given that most of perylene is resulted from early diagenesis of organic matter in soil,its higher concentrations in spring than in winter may indicate a higher contribution of eolian soil to the atmospheric particulates in spring owing to the stronger wind and snow melting in North China.Higher concentrations of fluorene were observed in cities with higher coal consumption,in consistence with its coal combustion origin.The results demonstrated that PUF-PAS technique can be used in the monitoring of PAHs in the atmosphere at a regional or global scale.
【Fund】: 国家自然科学基金项目(40590391 40518002)
【CateGory Index】: X831
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