Contamination and potential toxicity of heavy metals in sediment of the ocean disposal site
Bibliographic record
Abstract
This study investigates the distribution, and accumulation of heavy metals in sediments of ocean disposal site. Sediment samples which collected from eleven locations in the ocean disposal site pre quarterly in 2009 were analyzed for metal content (e.g., Hg, Pb, Cd, Cr, Cu, Zn, Ni and Al), organic matter, and grain size. Base on the research results, the metal concentrations varied from 0.11 mg/kg for Cd to 198 mg/kg for Zn. All heavy metal concentrations excluding Hg and Ni of dumping area center in ocean disposal site is higher than other sites. Referring to enrichment factor (EF) assessment, both Cu and Cr in sediments of disposal area showed minor enrichment (EF <3) when comparing with the reference point which is located at outside of disposal site. Moreover, referring to sediment quality guidelines (SQGs), and mean ERM quotient (m-ERM-q), the dredged sediment disposal site is classified as “Medium — low contamination levels” where most samples (97%) have a medium — low (30%) probability of toxicity pollution.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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 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".