Divalent Cation Addition (Ca <sup>2+</sup> or Mg <sup>2+</sup> ) Stabilizes Biological Treatment of Perchlorate and Nitrate In Ion-Exchange Spent Brine
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
Anaerobic cultures capable of reducing both perchlorate and nitrate simultaneously in a 3 or 6% NaCl synthetic media were tested for their ability to remove perchlorate and nitrate in actual ion-exchange brines. The addition of divalent cations (e.g., Mg2+ and Ca2+), and nolmonovalent ions, in greater than typical concentrations, improved cultures stability and the rate of perchlorate degradation. The optimal condition was when Mg2+ was added to brine to achieve a ratio of Mg2+ to Na+ of 0.11 (mol/mol) in 3 or 5.2% NaCl ion-exchange brine. Under these conditions the inoculum was capable of reducing perchlorate to nondetectable limits at rates up to 120 μg/L · h. In this way the brine can be reused in the perchlorate ion exchange process, thus conserving salt (NaCl), reducing waste brine discharge, and eliminating the reintroduction of the contaminants into the environment.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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