| Titre | Using tree cores to evaluate historic atmospheric concentrations and trends of polycyclic aromatic compounds in the Oil Sands region of Alberta, Canada |
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| Auteur | Rauert, C; Harner, T; Ahad, J M E ; Percy, K E |
| Source | Science of the Total Environment vol. 739, 139996, 2020 p. 1-7, https://doi.org/10.1016/j.scitotenv.2020.139996 |
| Image |  |
| Année | 2020 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200110 |
| Éditeur | Elsevier |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/j.scitotenv.2020.139996 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Alberta |
| SNRC | 73M; 74D; 74E; 74L; 83P; 84A; 84H; 84I |
| Lat/Long OENS | -113.5000 -110.0000 58.5000 55.7500 |
| Sujets | échantillons carrotés; hydrocarbures aromatiques; géochimie atmosphérique; sables bitumineux; sables bitumineux; ressources pétrolières; exploitation minière; Méthodologie; Arbre; Émissions
atmosphériques; géologie de l'environnement; combustibles fossiles; géologie économique; géochimie; Nature et environnement; Sciences et technologie; Économie et industrie |
| Illustrations | photographies; graphiques; profils; séries chronologiques |
| Programme | Le Programme de recherche et de développement énergétiques (PRDE) |
| Diffusé | 2020 06 05 |
| Résumé | (disponible en anglais seulement)
Tree cores and bark were sampled from jack pine trees at 18 sites in the Athabasca Oil Sands Region (AOSR) of Alberta, Canada, to investigate spatial and
temporal trends of polycyclic aromatic compounds (PACs). Spatial rends were investigated in the bark samples, where sum PAC concentrations ranged from 75 to 3615 ng/g. Highest concentrations were observed from trees within 40 km of the nearest
mining or upgrading facility perimeter fence, in linewith previous deposition studies in the AOSR. The sampled tree cores were separated into segments representing 5 years of growth/atmospheric collection by counting tree rings. A significant
increase in PAC concentrations over the lifetime of the tree was observed at sites with the highest PAC concentrations, and the average % increase in concentration from1970 to 2015was in linewith average % growth in bitumen extraction in the AOSR.
Finally, the concentrations in the tree core segments representing collection from2010 to 2015 were converted into an atmospheric PAC concentration using previously published wood-air partition coefficients. The calculated atmospheric concentrations
were within the same range as concentrations reported from the passive atmospheric sampling network in this region. The importance of site location is highlighted,with forest edge sites providing an improved comparison for atmospheric exposure and
deposition. This is the first study to use tree cores to calculate an atmospheric concentration of PACs, demonstrating the applicability of this methodology for providing historic atmospheric data. |
| GEOSCAN ID | 326418 |
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