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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ftuninhampshire:oai:scholars.unh.edu:civeng_facpub-1141 2024-09-15T17:48:31+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 L. Dickhut, Rebecca Lohmann, Rainer 2016-09-01T07:00:00Z https://scholars.unh.edu/civeng_facpub/141 https://doi.org/10.1016/j.envpol.2016.05.092; https://www.sciencedirect.com/science/article/pii/S026974911630481X unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/civeng_facpub/141 doi: https://dx.doi.org/10.1016/j.envpol.2016.05.092 https://www.sciencedirect.com/science/article/pii/S026974911630481X Civil & Environmental Engineering Antarctic PDBEs PCBs Snow Glacier text 2016 ftuninhampshire https://doi.org/10.1016/j.envpol.2016.05.092;10.1016/j.envpol.2016.05.092 2024-08-02T04:50:27Z 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 New Hampshire: Scholars Repository |
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University of New Hampshire: Scholars Repository |
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language |
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Antarctic PDBEs PCBs Snow Glacier |
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Antarctic PDBEs PCBs Snow Glacier Khairy, Mohammed A. Luek, Jenna L. Dickhut, Rebecca Lohmann, Rainer Levels, sources and chemical fate of persistent organic pollutants in the atmosphere and snow along the western Antarctic Peninsula |
topic_facet |
Antarctic PDBEs PCBs Snow Glacier |
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 L. Dickhut, Rebecca Lohmann, Rainer |
author_facet |
Khairy, Mohammed A. Luek, Jenna L. 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 |
University of New Hampshire Scholars' Repository |
publishDate |
2016 |
url |
https://scholars.unh.edu/civeng_facpub/141 https://doi.org/10.1016/j.envpol.2016.05.092; https://www.sciencedirect.com/science/article/pii/S026974911630481X |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Civil & Environmental Engineering |
op_relation |
https://scholars.unh.edu/civeng_facpub/141 doi: https://dx.doi.org/10.1016/j.envpol.2016.05.092 https://www.sciencedirect.com/science/article/pii/S026974911630481X |
op_doi |
https://doi.org/10.1016/j.envpol.2016.05.092;10.1016/j.envpol.2016.05.092 |
_version_ |
1810289795011706880 |