GEOSCAN, résultats de la recherche


TitreSOURCES: waterborne contamination in the oil sands region / Contamination par transport aqueux dans la région des sables bitumineux
TéléchargerTéléchargement (publication entière)
AuteurGammon, P
SourcePublic presentations of May 8th, 2018: Environmental Geoscience Program, current status of research projects, May 2018; par Jacob, N; Kao, H; Galloway, J; Parsons, M; White, D; Larmagnat, S; Rivard, C; Gammom, P; Savard, M M; Commission géologique du Canada, Présentation scientifique 88, 2018 p. 108-124,
ÉditeurRessources naturelles Canada
Documentpublication en série
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Jacob, N; Kao, H; Galloway, J; Parsons, M; White, D; Larmagnat, S; Rivard, C; Gammon, P; Savard, M M; (2018). Public presentations of May 8th, 2018: Environmental Geoscience Program, current status of research projects, May 2018, Commission géologique du Canada, Présentation scientifique no. 88
SNRC73M/13; 73M/14; 73M/15; 73M/16; 74D; 74E; 74L/01; 74L/02; 74L/03; 74L/04; 74L/05; 74L/06; 74L/07; 74L/08; 83P/14; 83P/15; 83P/16; 84A/01; 84A/02; 84A/03; 84A/06; 84A/07; 84A/08; 84A/09; 84A/10; 84A/11; 84A/14; 84A/15; 84A/16; 84H/01; 84H/02; 84H/03; 84H/06; 84H/07; 84H/08; 84H/09; 84H/10; 84H/11; 84H/14; 84H/15; 84H/16; 84I/01; 84I/02; 84I/03; 84I/06; 84I/07; 84I/08
Lat/Long OENS-113.5000 -110.0000 58.5000 55.7500
Sujetsetudes de l'environnement; effets sur l'environnement; substances polluantes; métaux; régions émettrices; établissement de modèles; modèles; milieu hydrologique; analyses géochimiques; interprétations géochimiques; analyses hydrauliques; etudes isotopiques; chlorure; matières organiques; écosystèmes; terres humides; biodégradation; attenuation; concentration; géochimie de l'eau; géochimie des eaux souterraines; eaux de surface; exploitation minière; sables bitumineux; résidus; analyses des résidus; ressources pétrolières; hydrocarbures; distribution des éléments; bassins versants; regimes d'écoulement; Formation de Mcmurray ; géologie de l'environnement; combustibles fossiles; hydrogéologie; géochimie
Illustrationslocation maps; geoscientific sketch maps; plots; photographs; flow diagrams; schematic diagrams; diagrams
ProgrammeGestion du programme, Géosciences de l'environnement
Diffusé2018 06 27; 2018 07 04
Résumé(disponible en anglais seulement)
The aim of the Sources Project is to quantify the environmental risks associated with the large extractive Athabasca oil sands industry, including the development of methods to apportion emissions to their original source. To accomplish either of these tasks for waterborne emissions requires knowing two principle characteristics: the flux (amount) of the emissions and the reactions those emissions undergo within the receiving environment. A Reactive Transport Model (RTM) defines both of these through coupled hydrologic and geochemical models. An RTM is under development for a wetland test site that is down hydraulic gradient from a large, long?lived oil sands tailings pond (TP). Waterborne emissions enter the test site from the western edge and then flow southward along a preferred conglomeratic subsurface conduit. From the conduit emissions spread both laterally and rise to the surface then spread laterally into wetland surface environments. The identification and apportionment of these emissions indicates that multiple metals and isotopic signatures identify the extent of the emissions. However, chloride is the traditional ion used to identify emissions in oil sands monitoring, but it fails to distinguish emissions sources in the test area due to the plethora of potential saline inputs. The geochemical model indicates metal constituents undergo sorption and attenuation along the flow path, with organometallic complexes playing an important but previously unrecognized role. Fluxes will be calculated once the hydraulic model has completed numerical verification. The organic constituents within emissions, primarily napthanic acids (NAs), are commonly regarded as posing the greatest environmental risk from waterborne emissions. However, defining their geochemical behaviour in environmental systems remains problematic. To address this issue an experiment was performed to see if biodegradation was attenuating NAs. Biotraps were installed with an isotopically labelled adamantine structured NA. Extracted phospholipids from the microbes that populated the biotraps demonstrated strong evidence for methanotrophic metabolic pathways, with no evidence the microbiome were biodegrading the NA. This suggests that these adamantine-structured Nas would persist within the Athabasca environment.