Using a Heated Column Experiment to Investigate the Long-Term Effects of Thermal Recovery Operations on the Release, Mobilization, and Attenuation of Arsenic in Groundwater
Bibliographic record
Abstract
Steam assisted gravity drainage is a form of thermal recovery technology used for unconventional oil.It can result in the heating of surrounding sediments and associated porewater and has the potential to mobilize otherwise immobile groundwater contaminants, such as arsenic.The current study was conducted to continue with the analysis of geochemical reactions within a column to gain a better understanding of the long-term effects of thermal recovery operations on groundwater contamination, with an emphasis on arsenic.A temperature range of 50 °C to 90 °C was implemented within a heated section of the column to mimic thermal influence on an aquifer adjacent to a steam assisted gravity drainage well.During the year-long study, aqueous concentrations of silica, arsenic, aluminum, titanium, and zinc were found to increase within the heated section of the column.This suggests that thermal recovery operations do have the potential to mobilize contaminants in groundwater.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".