Development of a Standardized Leaching Procedure for the Evaluation of Uranium Mobility in Groundwater in Nova Scotia
Bibliographic record
Abstract
Approximately 4% of drinking water wells in Nova Scotia contain elevated concentrations of naturally-occurring uranium. There is demand for a simple and effective procedure to evaluate soil and rock formations for uranium mobility prior to the development of potable water supplies in vulnerable regions. Empirical evidence shows that uranium mobilization in groundwater can be enhanced in the presence of key ions. A series of extractions were performed on uranium-bearing Nova Scotian rocks, noting the impact of calcium, sodium, chloride, and bicarbonate concentrations in the extraction fluid on uranium mobilization. A uranium leaching procedure (ULP) was developed and compared to the general synthetic precipitation leaching procedure (SPLP). The ULP was capable of mobilizing an order of magnitude or more uranium than the SPLP from six Nova Scotian rock samples and shows promise as a tool for choosing groundwater resources to minimize the risk of groundwater contamination through uranium mobilization.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".