Using Heated Column Experiments to Investigate the Effects of In-Situ Thermal Recovery Operations on Groundwater Geochemistry in Cold Lake, Alberta
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Groundwater monitoring studies of the Cold Lake-Beaver River (CLBR) basin in Alberta have linked increases in arsenic concentration to subsurface heat release caused by in-situ thermal recovery operations. Aquifer sediments that are exposed to localized elevated temperature conditions undergo increased rates of water-rock interactions have the potential to liberate contaminants in potable groundwater sources at near-neutral pH levels. Preliminary laboratory experiments and field investigations have shown an increased rate of reaction at temperatures >80°C with respect to mineral dissolution and the release of contaminants. In this study, three heated column experiments were carried out using different mineralogical compositions of saturated aquifer materials, while exposing the materials to temperatures up to 90°C and monitoring water geochemistry. Aquifer materials that were used in the three experiments included: quartz sand; quartz sand with pyrite; and sediments collected from the CLBR region.
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Copyright © 2018 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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craig-usingheatedcolumnexperimentstoinvestigate.pdf | 2023-05-05 | Public | Download |