title: [Pollution characterization and source apportionment of polybrominated diphenyl ethers in autumn air of Xi'an].
abstract: Air samples in gas and particle phases were collected using a high volume active sampler from August to October in 2008 at Xi'an for evaluating the pollution level of polybrominated diphenyl ethers (PBDEs). Lower brominated PBDEs and BDE-209 were analyzed via GC-MS and GC/ECD, respectively. The total concentrations (gas plus particle phases) of 12 PBDEs were ranged from 37.43 to 620.30 pg/m3, with an average of 216.28 pg/m3, while tri- to hexa-brominated congeners (Sigma11 PBDEs) ranged from 16.32 to 86. 49 pg/m3, BDE-209 ranged from 16. 34 to 576.01 pg/m3. Tri- to tetra-brominated congeners existed mainly in gas phase, tetra- to hexa-brominated congeners were predominated in particle phase, and BDE-209 was detected only in particle phase. The proportion of PBDEs in particle phase increased with bromine number. Gas-particle partition coefficient of PBDEs was well correlated with sub-cooled liquid vapor pressure, and the partitioning of PBDEs between gas and particle phases were close to equilibrium. Correlation analysis indicated that all the PBDEs have good coefficients except BDE-85. Source analysis indicated that PBDEs in the atmosphere of Xi'an were mainly from the Penta-BDE and Deca-BDE contamination.
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. jiangjl1010@163.com
authors.forename: Jun-Li
authors.initials: JL
authors.lastname: Jiang
authors.forename: Cheng-Zhong
authors.initials: CZ
authors.lastname: Zhang
authors.forename: Wan-Li
authors.initials: WL
authors.lastname: Ma
authors.forename: Meng
authors.initials: M
authors.lastname: Yany
authors.forename: Bian-Hong
authors.initials: BH
authors.lastname: Zhou
authors.forename: Li-Zhong
authors.initials: LZ
authors.lastname: Liu
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Li
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000032:analysis*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis; D055768:Halogenated Diphenyl Ethers / Q000032:analysis* / Q000737:chemistry; D012621:Seasons
chemical_list: D000393:Air Pollutants; D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; C010902:decabromobiphenyl ether