Assessing nutrient loading from reclaimed water irrigation using the chemical marker iohexol
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
Abstract Reclaimed water irrigation is a beneficial practice that could worsen nitrogen impairment of surrounding waterbodies. Estimating this contribution requires development of a suitable chemical marker. Toward that end, reuse effluents throughout Florida analyzed by liquid chromatography tandem mass spectrometry or high‐resolution atomic mass identified the radiographic contrast medium iohexol as a marker unique to reclaimed water. Because iohexol may be subject to biodegradation during subsurface transport or photolability during surficial flow, this study measured iohexol degradation from solar insolation and its stability relative to nitrate during soil transport for inclusion within a mass balance calculation for a nitrogen impaired surface water in Naples, Florida. In this application, the reuse irrigation fractional volumetric flow contribution was ≤7% of the flow to the impaired waterbody. Subsurface flow was not considered because column experiments with local soil demonstrated preferential denitrification over iohexol biodegradation. Additional studies are needed to further demonstrate the potential merit of this approach in different regions.
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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 | 0.000 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 it