Adsorption of Polycyclic Aromatic Hydrocarbons by Polyethylene Microplastics in Freshwaters
Bibliographic record
Abstract
Microplastics (MPs), which are ubiquitous in the environment, have been shown to adsorb organic contaminants of concern including polycyclic aromatic hydrocarbons (PAHs). Any MPs which are not removed via drinking water treatment may enter the human body via consumption and act as vectors for PAHs. In this thesis sorption trials were conducted using both artificial and real water matrices along with two different sizes (200 µm and 1090 µm) of virgin and weathered polyethylene (PE) microspheres. This experimental design allowed direct comparison of the impacts of natural waters and weathering on sorption capacity. Of the factors examined, size and surface area, and hydrophobicity, with respect to both the polymer and PAHs were identified as most critical. Overall, results of this study provide insight into the sorption behavior of microplastics in freshwater environments and their potential to adsorb organic contaminants.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".