Selective Oxidation of Primary Alcohol for Cellulose at C_6 Position and Its Application in Adsorption of Bisphenol A
Bibliographic record
Abstract
The oxidized cellulose(OC) was prepared by HNO3/H3PO4-NaNO2oxidation system.The structure of OC was characterized by FT-IR spectroscopy and solid-state13C NMR,and the carboxyl content was determined by acid-base titration method in present study.Meanwhile,the prepared OC was used as adsorbent and its adsorption properties for bisphenol A(BPA) were investigated.The results revealed that the C6 primary hydroxyl groups of cellulose were selectively oxidized to carboxyl groups by this oxidation system,and the carboxyl content was about 20%.The adsorption equilibrium time was about30 min at 298 K,and the maximum adsorption capacity(qm) of OC for BPA was 12.67 mg/g.The adsorption capacity increased with the increase of initial BPA concentration.Neutral condition and low temperature were benificial for adsorption,but the presence of electrolytes in the solution was negative for the adsorption of BPA.The adsorption of BPA on OC was considered as a monolayer adsorption and chemisorption process.The adsorption kinetics followed the second-order equation.Langmuir model fitted the equilibrium data better than the Freundlich isotherm.
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How this classification was reachedexpand
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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".