Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula
The Antarctic continent is among the most pristine regions; yet various organic contaminants have been measured there routinely. Air and snow samples were collected during the austral spring (October - November, 2010) along the western Antarctic Peninsula and analyzed for organochlorine pesticides (...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1156 2024-09-15T17:41:36+00:00 Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula Khairy, Mohammed A. Luek, Jenna Dickhut, Rebecca Lohmann, Rainer 2016-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/150 https://doi.org/10.1016/j.envpol.2016.05.092 https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/viewcontent/auto_convert.pdf https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/0/type/additional/viewcontent/Lohmann_LevelsSources_Figures_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/1/type/additional/viewcontent/Lohmann_LevelsSources_Highlights_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/2/type/additional/viewcontent/Lohmann_LevelsSources_SuppInfo_2016.doc unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/150 doi:10.1016/j.envpol.2016.05.092 https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/viewcontent/auto_convert.pdf https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/0/type/additional/viewcontent/Lohmann_LevelsSources_Figures_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/1/type/additional/viewcontent/Lohmann_LevelsSources_Highlights_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/2/type/additional/viewcontent/Lohmann_LevelsSources_SuppInfo_2016.doc Graduate School of Oceanography Faculty Publications text 2016 ftunivrhodeislan https://doi.org/10.1016/j.envpol.2016.05.092 2024-08-21T00:09:33Z The Antarctic continent is among the most pristine regions; yet various organic contaminants have been measured there routinely. Air and snow samples were collected during the austral spring (October - November, 2010) along the western Antarctic Peninsula and analyzed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) to assess the relative importance of long-range transport versus local primary or secondary emissions. Highest concentrations of PCBs, PBDEs and DDTs were observed in the glacier's snow sample, highlighting the importance of melting glaciers as a possible secondary source of legacy pollutants to the Antarctic. In the atmosphere, contaminants were mainly found in the vapor phase (> 65 %). Hexachlorobenzene (33.6 pg/m3), PCBs (11.6 pg/m3), heptachlor (5.64 pg/m3), PBDEs (4.22 pg/m3) and cis-chlordane (2.43 pg/m3) were the most abundant contaminants. In contrast to other compounds, PBDEs seem to have originated from local sources, possibly the research station itself. Gas-particle partitioning for analytes were better predicted using the adsorption partitioning model than an octanol-based absorption approach. Diffusive flux calculations indicated that net deposition is the dominant pathway for PBDEs and chlordanes, whereas re-volatilization from snow (during melting or metamorphosis) was observed for PCBs and some OCPs. Text Antarc* Antarctic Antarctic Peninsula University of Rhode Island: DigitalCommons@URI Environmental Pollution 216 304 313 |
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Open Polar |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
language |
unknown |
description |
The Antarctic continent is among the most pristine regions; yet various organic contaminants have been measured there routinely. Air and snow samples were collected during the austral spring (October - November, 2010) along the western Antarctic Peninsula and analyzed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) to assess the relative importance of long-range transport versus local primary or secondary emissions. Highest concentrations of PCBs, PBDEs and DDTs were observed in the glacier's snow sample, highlighting the importance of melting glaciers as a possible secondary source of legacy pollutants to the Antarctic. In the atmosphere, contaminants were mainly found in the vapor phase (> 65 %). Hexachlorobenzene (33.6 pg/m3), PCBs (11.6 pg/m3), heptachlor (5.64 pg/m3), PBDEs (4.22 pg/m3) and cis-chlordane (2.43 pg/m3) were the most abundant contaminants. In contrast to other compounds, PBDEs seem to have originated from local sources, possibly the research station itself. Gas-particle partitioning for analytes were better predicted using the adsorption partitioning model than an octanol-based absorption approach. Diffusive flux calculations indicated that net deposition is the dominant pathway for PBDEs and chlordanes, whereas re-volatilization from snow (during melting or metamorphosis) was observed for PCBs and some OCPs. |
format |
Text |
author |
Khairy, Mohammed A. Luek, Jenna Dickhut, Rebecca Lohmann, Rainer |
spellingShingle |
Khairy, Mohammed A. Luek, Jenna Dickhut, Rebecca Lohmann, Rainer Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
author_facet |
Khairy, Mohammed A. Luek, Jenna Dickhut, Rebecca Lohmann, Rainer |
author_sort |
Khairy, Mohammed A. |
title |
Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
title_short |
Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
title_full |
Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
title_fullStr |
Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
title_full_unstemmed |
Levels, Sources and Chemical Fate of Persistent Organic Pollutants in the Atmosphere and Snow along the Western Antarctic Peninsula |
title_sort |
levels, sources and chemical fate of persistent organic pollutants in the atmosphere and snow along the western antarctic peninsula |
publisher |
DigitalCommons@URI |
publishDate |
2016 |
url |
https://digitalcommons.uri.edu/gsofacpubs/150 https://doi.org/10.1016/j.envpol.2016.05.092 https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/viewcontent/auto_convert.pdf https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/0/type/additional/viewcontent/Lohmann_LevelsSources_Figures_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/1/type/additional/viewcontent/Lohmann_LevelsSources_Highlights_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/2/type/additional/viewcontent/Lohmann_LevelsSources_SuppInfo_2016.doc |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/150 doi:10.1016/j.envpol.2016.05.092 https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/viewcontent/auto_convert.pdf https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/0/type/additional/viewcontent/Lohmann_LevelsSources_Figures_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/1/type/additional/viewcontent/Lohmann_LevelsSources_Highlights_2016.docx https://digitalcommons.uri.edu/context/gsofacpubs/article/1156/filename/2/type/additional/viewcontent/Lohmann_LevelsSources_SuppInfo_2016.doc |
op_doi |
https://doi.org/10.1016/j.envpol.2016.05.092 |
container_title |
Environmental Pollution |
container_volume |
216 |
container_start_page |
304 |
op_container_end_page |
313 |
_version_ |
1810487834238255104 |