Study on the adsorption–desorption behaviours of La <sup>3+</sup> , Sm <sup>3+</sup> , and <scp> Y <sup>3</sup> </scp> <sup>+</sup> by <scp>HEHEHP</scp> extraction resin in chloride medium
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Bibliographic record
Abstract
Abstract The adsorption–desorption behaviours of La 3+ , Sm 3+ , and Y 3+ on 2‐ethylhexylphosphonic acid mono‐2‐ethyl hexyl ester (HEHEHP) extraction resin were investigated in a chloride medium. The effects of reaction time, pH, hydrochloric acid concentration, flow rate, and adsorption mechanism were studied in detail using static and dynamic experimental methods. The results show that La 3+ is the first to reach adsorption equilibrium, followed by Sm 3+ and Y 3+ ; the highest adsorption capacities of La 3+ , Sm 3+ , and Y 3+ are obtained at solution pH of 4 and in the order of Y 3+ > Sm 3+ > La 3+ . La 3+ , Sm 3+ , and Y 3+ can be eluted by 0.3, 0.5, and 3 mol/L hydrochloric acid, respectively, indicating that La 3+ elutes most easily, and Y 3+ is difficult. Moreover, the flow rate has little effect on the peak of rare earth desorption. The adsorption process is chemisorption; the slope method indicates that for each mol Sm 3+ or Y 3+ ion adsorbed, 3 mol H + ions are simultaneously released, but two for La 3+ under the given pH conditions. It is expected to provide theoretical and technical support for preparation of ultra‐high purity rare earth by HEHEHP extraction resin.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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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