Concentrations and Spatial Variations of Polybrominated Diphenyl Ethers and Other Organohalogen Compounds in Great Lakes Air

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• 作者：Bo Strandberg ; Nathan G. Dodder ; Ilora Basu ; and Ronald A. Hites
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：March 15, 2001
• 年：2001
• 卷：35
• 期：6
• 页码：1078 - 1083
• 全文大小：74K
• 年卷期：v.35,no.6(March 15, 2001)
• ISSN：1520-5851

文摘

Air samples were analyzed from urban, rural, and remotesites near the Great Lakes to investigate the occurrence,concentrations, and spatial and temporal differencesof polybrominated diphenyl ethers (PBDE) in air. Theconcentrations of PBDEs were compared to those ofother organohalogen compounds such as PCBs andorganochlorine pesticides. The samples were collected in1997-1999 as part of the Integrated AtmosphericDeposition Network (IADN). To minimize the variability ofthe data, we selected only samples taken when theatmospheric temperature was 20 ± 3 ges/entities/deg.gif">C. PBDEs werefound in all samples, indicating that these compounds arewidely distributed and that they can be transportedthrough the atmosphere to remote areas. The totalconcentrations of PBDEs were similar to some of theorganochlorine pesticides such as ges/gifchars/Sigma.gif" BORDER=0 >DDT and ranged from5 pg/m³ near Lake Superior to about 52 pg/m³ in Chicago.In fact, the spatial trend was well correlated to those ofPCBs. Our results indicate a relatively constant levelfrom mid-1997 to mid-1999. At 20 ± 3 ges/entities/deg.gif">C, about 80% ofthe tetrabromo homologues are in the gas phase and about70% of the hexabromo homologues are associated withthe particle phase. Thus, particle-to-gas partitioning in theatmosphere is an important process for these compounds.