In Situ Remediation Method for Enhanced Sorption of Perfluoro-Alkyl Substances onto Ottawa Sand
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Perfluoro-alkyl substances (PFAS) have drawn increased concern in recent years. Due to resistance to many remediation methods and potential for long-range transport, there is need for continued in situ remediation technique development. One such method is enhanced sorption onto aquifer material, thereby sequestering a plume and preventing long-range migration. Batch tests and column studies were carried out to evaluate the ability of polydiallyldimethylammonium chloride (PDM) and polyamine (PA) to enhance the adsorption of six PFAS onto Ottawa sand. At a dosage of 2,000 mg/L of either PDM or PA, results show increases of adsorption of the tested PFAS in all batches by factors of 3.6–45. Column studies showed retention capacity increasing up to six times for perfluorooctanoic acid (PFOA) and 10 times for perfluorooctane sulfonic acid (PFOS). Normalizing partitioning coefficients from batch tests to fraction of organic carbon suggest that an interaction other than PFAS associating with organic matter may be the main driving force behind sorption enhancement. These results suggest that this method shows promise for in situ remediation of PFAS-contaminated groundwater.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it