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March 5, 2026Applied GeochemistryOpen Access

Effects of Tailings Treatment and Hydrocarbons on Sulfur Biogeochemistry and Consolidation of Oil Sands Tailings in Pit Lake Scenarios

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Authors

HCHeidi L. CosseyUniversity of AlbertaHKHeather KaminskyNorthern Alberta Institute of TechnologyAUAnia C. UlrichUniversity of Alberta

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Overview

This investigation compares untreated and treated tailings in pit lakes, revealing implications for reclamation methods.

Key Points

  • Evaluate the effects of tailings treatment and hydrocarbon amendments on fluid fine tailings in pit lakes, focusing on biogeochemical changes.
  • Monitored 40 columns for 540 days under anaerobic conditions
  • Evaluated effects of tailings treatment, hydrocarbon amendments, and temperature variations (10 °C and 20 °C)
  • Compared the behavior of untreated and treated fluid fine tailings (FFT)
  • Treatment decreased dewatering and consolidation performance
  • Sulfate reduction was significantly enhanced in treated FFT and with hydrocarbon amendments
  • Treated FFT showed a greater abundance of sulfate reducing bacteria
  • Hydrocarbon amendments resulted in rapid >99% sulfate reduction
  • Sulfate reduction increased alkalinity and CO2 while decreasing cation concentrations

Cite This Study

Cossey et al. (2026) studied this question.

synapsesocial.com/papers/69a91cbed6127c7a504bfaedhttps://doi.org/10.1016/j.apgeochem.2026.106755
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Effects of pressure on the biogeochemical and geotechnical behavior of treated oil sands tailings in a pit lake scenario2024
  2. 2Methane Production Dynamics in Fluid Fine Tailings of an Oil Sand Pit Lake2026
  3. 3Consolidation Performance of Oil Sands Tailings: Data-Driven Insights and Practical Implications for Tailings Landforms Closure and Design2026 · 1 citations
  4. 4Evaluation of boreal plant and microbe communities on tailings solvent recovery unit (TSRU) tailings: A meso-scale greenhouse study2025
  5. 5Cascading sulfur cycling in simulated oil sands pit lake water cap mesocosms transitioning from oxic to euxinic conditions2024 · 3 citations