|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5753177||1620325||2017||5 صفحه PDF||سفارش دهید||دانلود کنید|
- The occurrence of POPs in the Antarctic Plateau is demonstrated for the first time.
- The mass per sample of PCBs, HCHs and HCB show a minimum at the South Pole.
- POPs reach the Antarctic Plateau by atmospheric transport from the free troposphere.
Persistent organic pollutants (POPs) bioaccumulate in biota, have long residence times in the environment, and potential for long range atmospheric transport. Here, we show the first measurements of legacy POPs in the atmosphere of the Antarctic Plateau from 73Â° South to the South Pole. Samples were taken using passive samplers. The amount of polychlorinated biphenyls (as â26PCBs) per sample ranged from 0.8Â ng to 26Â ng. The mass per sample of hexachlorobenzene (HCB) and Î³-hexachlorocyclohexane (Î³-HCH) in the gas-phase ranged from 0.67Â ng to 2.7Â ng and from non-detected to 2.6Â ng, respectively. The lowest amounts of POPs were observed at the South Pole. This work shows that POPs have also reached the remotest region of Earth from primary sources. The assessment of the air mass back trajectories and current knowledge of atmospheric circulation over the Antarctic continent suggests that POPs reach the Antarctic Plateau by subduction of air masses from the free troposphere.
Journal: Atmospheric Environment - Volume 149, January 2017, Pages 104-108