Passive Air Sampling of Polychlorinated Biphenyls and Organochlorine Pesticides at the Korean Arctic and Antarctic Research Stations: Implications for Long-Range Transport and Local Pollution

详细信息    查看全文

• 作者：Sung-Deuk Choi ; Song-Yee Baek ; Yoon-Seok Chang ; Frank Wania ; Michael G. Ikonomou ; Young-Jun Yoon ; Byong-Kwon Park ; Sungmin Hong
• 刊名：Environmental Science & Technology
• 出版年：2008
• 出版时间：October 1, 2008
• 年：2008
• 卷：42
• 期：19
• 页码：7125-7131
• 全文大小：200K
• 年卷期：v.42,no.19(October 1, 2008)
• ISSN：1520-5851

文摘

To assess levels and patterns of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in polar regions, XAD-resin based passive air samplers were deployed for one year at the Korean polar research stations at Ny-Ålesund, Norway (2005−2006) and King George Island, Antarctica (2004−2005). Backward trajectories suggest that these stations are affected by long-range transport from source regions in Northern Europe and Russia and the southern tip of South America, respectively. Relatively high levels of PCB-11, averaging 60 pg·m⁻³, were observed in Antarctica, suggesting an unusual source of PCB-11 to the Southern Hemisphere. Reflecting the hemispheric distribution of global PCB emissions, the average level of Σ₂₀₅PCB (excluding three mono-CBs and PCB-11) was five times higher in the Arctic (95 pg·m⁻³) than in the Antarctic (19 pg·m⁻³). Levels of Σ₉PCB at Ny-Ålesund were similar to those reported for other Arctic sites, while levels at King George Island were lower than at other sites on the Antarctic Peninsula but 1 order of magnitude higher than background levels measured at a more remote Antarctic site. Light homologues were predominant in all samples (except for one Arctic sample), consistent with the hypothesis of global fractionation and predictions of long-range transport potential. Dominance of heavy PCBs on the roof of the main building at Ny-Ålesund and a concentration gradient with distance from the main building at King George Island strongly indicated the influence of local sources. OCP levels were also influenced by long-range transport but not by local sources. This study highlights the feasibility of using passive air sampling to assess both long-range transport and local pollution in remote regions.