Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut
Contaminants, such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), heavy metals, and per and polyfluoroalkyl substances (PFASs), primarily reach the Arctic through long-range atmospheric and oceanic transport. However, local sources within the Arctic also contribute to...
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ftdoajarticles:oai:doaj.org/article:f5fecd3784704253977036991809dbe8 2024-01-21T10:03:26+01:00 Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut Meaghan C. Bartley Tommy Tremblay Amila O. De Silva C. Michelle Kamula Stephen Ciastek Zou Zou A. Kuzyk 2024-03-01T00:00:00Z https://doi.org/10.1016/j.ese.2023.100313 https://doaj.org/article/f5fecd3784704253977036991809dbe8 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2666498423000789 https://doaj.org/toc/2666-4984 2666-4984 doi:10.1016/j.ese.2023.100313 https://doaj.org/article/f5fecd3784704253977036991809dbe8 Environmental Science and Ecotechnology, Vol 18, Iss , Pp 100313- (2024) Arctic sediments Mercury Polycyclic aromatic hydrocarbons (PAHs) Polychlorinated biphenyls (PCBs) Per and polyfluoroalkyl substances (PFASs) Persistent organic pollutants (POPs) Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066 article 1481 ftdoajarticles https://doi.org/10.1016/j.ese.2023.100313 2023-12-24T01:42:27Z Contaminants, such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), heavy metals, and per and polyfluoroalkyl substances (PFASs), primarily reach the Arctic through long-range atmospheric and oceanic transport. However, local sources within the Arctic also contribute to the levels observed in the environment, including legacy sources and new sources that arise from activities associated with increasing commercial and industrial development. The City of Iqaluit in Frobisher Bay, Nunavut (Canada), has seen rapid population growth and associated development during recent decades yet remains a site of interest for ocean protection, where Inuit continue to harvest country food. In the present study, seven dated marine sediment cores collected in Koojesse Inlet near Iqaluit, and from sites in inner and outer Frobisher Bay, respectively, were analyzed for total mercury (THg), major and trace elements, PAHs, PCBs, and PFASs. The sedimentary record in Koojesse Inlet shows a period of Aroclor 1260-like PCB input concurrent with military site presence in the 1950–60s, followed by decades of input of pyrogenic PAHs, averaging about ten times background levels. Near-surface sediments in Koojesse Inlet also show evidence of transient local-source inputs of THg and PFASs, and recycling or continued slow release of PCBs from legacy land-based sources. Differences in PFAS congener composition clearly distinguish the local sources from long-range transport. Outside Koojesse Inlet but still in inner Frobisher Bay, 9.2 km from Iqaluit, sediments showed evidence of both local source (PCB) and long-range transport. In outer Frobisher Bay, an up-core increase in THg and PFASs in sediments may be explained by ongoing inputs of these contaminants from long-range transport. The context for ocean protection and country food harvesting in this region of the Arctic clearly involves both local sources and long-range transport, with past human activities leaving a long legacy insofar as levels of persistent ... Article in Journal/Newspaper Arctic Frobisher Bay inuit Iqaluit Nunavut Directory of Open Access Journals: DOAJ Articles Arctic Canada Frobisher Bay ENVELOPE(-66.581,-66.581,62.834,62.834) Koojesse Inlet ENVELOPE(-68.498,-68.498,63.717,63.717) Nunavut Environmental Science and Ecotechnology 18 100313 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic sediments Mercury Polycyclic aromatic hydrocarbons (PAHs) Polychlorinated biphenyls (PCBs) Per and polyfluoroalkyl substances (PFASs) Persistent organic pollutants (POPs) Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066 |
spellingShingle |
Arctic sediments Mercury Polycyclic aromatic hydrocarbons (PAHs) Polychlorinated biphenyls (PCBs) Per and polyfluoroalkyl substances (PFASs) Persistent organic pollutants (POPs) Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066 Meaghan C. Bartley Tommy Tremblay Amila O. De Silva C. Michelle Kamula Stephen Ciastek Zou Zou A. Kuzyk Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
topic_facet |
Arctic sediments Mercury Polycyclic aromatic hydrocarbons (PAHs) Polychlorinated biphenyls (PCBs) Per and polyfluoroalkyl substances (PFASs) Persistent organic pollutants (POPs) Environmental sciences GE1-350 Environmental technology. Sanitary engineering TD1-1066 |
description |
Contaminants, such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), heavy metals, and per and polyfluoroalkyl substances (PFASs), primarily reach the Arctic through long-range atmospheric and oceanic transport. However, local sources within the Arctic also contribute to the levels observed in the environment, including legacy sources and new sources that arise from activities associated with increasing commercial and industrial development. The City of Iqaluit in Frobisher Bay, Nunavut (Canada), has seen rapid population growth and associated development during recent decades yet remains a site of interest for ocean protection, where Inuit continue to harvest country food. In the present study, seven dated marine sediment cores collected in Koojesse Inlet near Iqaluit, and from sites in inner and outer Frobisher Bay, respectively, were analyzed for total mercury (THg), major and trace elements, PAHs, PCBs, and PFASs. The sedimentary record in Koojesse Inlet shows a period of Aroclor 1260-like PCB input concurrent with military site presence in the 1950–60s, followed by decades of input of pyrogenic PAHs, averaging about ten times background levels. Near-surface sediments in Koojesse Inlet also show evidence of transient local-source inputs of THg and PFASs, and recycling or continued slow release of PCBs from legacy land-based sources. Differences in PFAS congener composition clearly distinguish the local sources from long-range transport. Outside Koojesse Inlet but still in inner Frobisher Bay, 9.2 km from Iqaluit, sediments showed evidence of both local source (PCB) and long-range transport. In outer Frobisher Bay, an up-core increase in THg and PFASs in sediments may be explained by ongoing inputs of these contaminants from long-range transport. The context for ocean protection and country food harvesting in this region of the Arctic clearly involves both local sources and long-range transport, with past human activities leaving a long legacy insofar as levels of persistent ... |
format |
Article in Journal/Newspaper |
author |
Meaghan C. Bartley Tommy Tremblay Amila O. De Silva C. Michelle Kamula Stephen Ciastek Zou Zou A. Kuzyk |
author_facet |
Meaghan C. Bartley Tommy Tremblay Amila O. De Silva C. Michelle Kamula Stephen Ciastek Zou Zou A. Kuzyk |
author_sort |
Meaghan C. Bartley |
title |
Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
title_short |
Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
title_full |
Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
title_fullStr |
Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
title_full_unstemmed |
Sedimentary records of contaminant inputs in Frobisher Bay, Nunavut |
title_sort |
sedimentary records of contaminant inputs in frobisher bay, nunavut |
publisher |
Elsevier |
publishDate |
1481 |
url |
https://doi.org/10.1016/j.ese.2023.100313 https://doaj.org/article/f5fecd3784704253977036991809dbe8 |
long_lat |
ENVELOPE(-66.581,-66.581,62.834,62.834) ENVELOPE(-68.498,-68.498,63.717,63.717) |
geographic |
Arctic Canada Frobisher Bay Koojesse Inlet Nunavut |
geographic_facet |
Arctic Canada Frobisher Bay Koojesse Inlet Nunavut |
genre |
Arctic Frobisher Bay inuit Iqaluit Nunavut |
genre_facet |
Arctic Frobisher Bay inuit Iqaluit Nunavut |
op_source |
Environmental Science and Ecotechnology, Vol 18, Iss , Pp 100313- (2024) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2666498423000789 https://doaj.org/toc/2666-4984 2666-4984 doi:10.1016/j.ese.2023.100313 https://doaj.org/article/f5fecd3784704253977036991809dbe8 |
op_doi |
https://doi.org/10.1016/j.ese.2023.100313 |
container_title |
Environmental Science and Ecotechnology |
container_volume |
18 |
container_start_page |
100313 |
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1788693715673415680 |