Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta.
The oil sands of Northern Alberta, Canada are one of the largest hydrocarbon reserves in the world. The rapid growth of the bitumen exploitation in this region involves large scale mining infrastructure, raising questions about the environmental impact of these operations. One of the main issues is...
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ftinrsquebec:oai:espace.inrs.ca:4052 2023-05-15T17:54:49+02:00 Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. Jautzy, Josué Ahad, Jason M. E. Hall, Roland I. Wiklund, Johan A. Gobeil, Charles Savard, Martine M. 2013 application/pdf https://espace.inrs.ca/id/eprint/4052/ https://espace.inrs.ca/id/eprint/4052/1/S3133.pdf en eng https://espace.inrs.ca/id/eprint/4052/1/S3133.pdf Jautzy, Josué, Ahad, Jason M. E., Hall, Roland I., Wiklund, Johan A., Gobeil, Charles et Savard, Martine M. (2013). Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. In: American Geophysical Union Fall Meeting - AGU 2013, 9-13 décembre 2013, San Francisco, États-Unis. inondation rivière de la Paix Paix-Athabasca analyse au radiocarbone Document issu d'une conférence ou d'un atelier Non évalué par les pairs 2013 ftinrsquebec 2023-02-10T11:42:49Z The oil sands of Northern Alberta, Canada are one of the largest hydrocarbon reserves in the world. The rapid growth of the bitumen exploitation in this region involves large scale mining infrastructure, raising questions about the environmental impact of these operations. One of the main issues is the emission of hazardous organic compounds such as polycyclic aromatic hydrocarbons (PAHs). PAHs, which are found naturally in petroleum, are also produced through incomplete combustion and diagenesis of organic matter. The complex nature of the surrounding geology (natural levels of bitumen) requires tools able to discriminate sources of pollutants. The establishment of the PAH background is crucial in order to investigate the impacts of oil sands mining in the Athabasca region. Here we present a new approach to discriminate the sources of alkylated PAHs (fossil or modern biomass) and their relative contributions. Using a dated sediment sequence from a lake situated in the Peace-Athabasca Delta periodically flooded by the Peace River, 6 different groups of parent and alkylated PAHs were extracted and collected by preparative capillary gas chromatography (PCGC) for natural abundance radiocarbon (14C) measurement. Three grouped layers each comprising approximately 10 years of sedimentation and spanning the period of mining operations (i.e., the past 40 years) were analyzed. We report here the first use of 14C measurements on alkylated PAHs extracted from lake sediments. Our results showed low radiocarbon content for all alkylated and parent PAHs analyzed in the three sediment layers. However, a slight trend toward a more modern PAH input can be seen up-core. PAH isomers ratios pointed to a major influence of petroleum input in the entire lake sequence, supporting the predominance of a fossil carbon source as indicated by the low radiocarbon contents. As the Peace River cuts through the Peace oil sands formation, our results can be explained by the main contribution of PAHs originating from periodic flooding events as ... Other/Unknown Material Peace River Rivière de la Paix Institut national de la recherche scientifique, Québec: Espace INRS Canada Peace-Athabasca Delta ENVELOPE(-111.502,-111.502,58.667,58.667) |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
inondation rivière de la Paix Paix-Athabasca analyse au radiocarbone |
spellingShingle |
inondation rivière de la Paix Paix-Athabasca analyse au radiocarbone Jautzy, Josué Ahad, Jason M. E. Hall, Roland I. Wiklund, Johan A. Gobeil, Charles Savard, Martine M. Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
topic_facet |
inondation rivière de la Paix Paix-Athabasca analyse au radiocarbone |
description |
The oil sands of Northern Alberta, Canada are one of the largest hydrocarbon reserves in the world. The rapid growth of the bitumen exploitation in this region involves large scale mining infrastructure, raising questions about the environmental impact of these operations. One of the main issues is the emission of hazardous organic compounds such as polycyclic aromatic hydrocarbons (PAHs). PAHs, which are found naturally in petroleum, are also produced through incomplete combustion and diagenesis of organic matter. The complex nature of the surrounding geology (natural levels of bitumen) requires tools able to discriminate sources of pollutants. The establishment of the PAH background is crucial in order to investigate the impacts of oil sands mining in the Athabasca region. Here we present a new approach to discriminate the sources of alkylated PAHs (fossil or modern biomass) and their relative contributions. Using a dated sediment sequence from a lake situated in the Peace-Athabasca Delta periodically flooded by the Peace River, 6 different groups of parent and alkylated PAHs were extracted and collected by preparative capillary gas chromatography (PCGC) for natural abundance radiocarbon (14C) measurement. Three grouped layers each comprising approximately 10 years of sedimentation and spanning the period of mining operations (i.e., the past 40 years) were analyzed. We report here the first use of 14C measurements on alkylated PAHs extracted from lake sediments. Our results showed low radiocarbon content for all alkylated and parent PAHs analyzed in the three sediment layers. However, a slight trend toward a more modern PAH input can be seen up-core. PAH isomers ratios pointed to a major influence of petroleum input in the entire lake sequence, supporting the predominance of a fossil carbon source as indicated by the low radiocarbon contents. As the Peace River cuts through the Peace oil sands formation, our results can be explained by the main contribution of PAHs originating from periodic flooding events as ... |
format |
Other/Unknown Material |
author |
Jautzy, Josué Ahad, Jason M. E. Hall, Roland I. Wiklund, Johan A. Gobeil, Charles Savard, Martine M. |
author_facet |
Jautzy, Josué Ahad, Jason M. E. Hall, Roland I. Wiklund, Johan A. Gobeil, Charles Savard, Martine M. |
author_sort |
Jautzy, Josué |
title |
Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
title_short |
Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
title_full |
Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
title_fullStr |
Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
title_full_unstemmed |
Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. |
title_sort |
compound-specific radiocarbon analysis to evaluate the contribution of peace river flooding to the pah background in the peace-athabasca delta. |
publishDate |
2013 |
url |
https://espace.inrs.ca/id/eprint/4052/ https://espace.inrs.ca/id/eprint/4052/1/S3133.pdf |
long_lat |
ENVELOPE(-111.502,-111.502,58.667,58.667) |
geographic |
Canada Peace-Athabasca Delta |
geographic_facet |
Canada Peace-Athabasca Delta |
genre |
Peace River Rivière de la Paix |
genre_facet |
Peace River Rivière de la Paix |
op_relation |
https://espace.inrs.ca/id/eprint/4052/1/S3133.pdf Jautzy, Josué, Ahad, Jason M. E., Hall, Roland I., Wiklund, Johan A., Gobeil, Charles et Savard, Martine M. (2013). Compound-specific radiocarbon analysis to evaluate the contribution of Peace River flooding to the PAH background in the Peace-Athabasca Delta. In: American Geophysical Union Fall Meeting - AGU 2013, 9-13 décembre 2013, San Francisco, États-Unis. |
_version_ |
1766162669974323200 |