Atmospheric reactions of gaseous mercury with ozone and hydroxyl radical: Kinetics and product studies
Bibliographic record
Abstract
The dominant form of mercury in the atmosphere is Hg 0 .The oxidation processes are of great importance since oxidized mercury undergoes deposition and can become subject to bio-accumulation.Experimental data on the gaseous reactions of elemental mercury are very limited with compare to the reactions of Hg 0 in solutions.We herein carried out kinetic and product studies on the reactions of gaseous Hg 0 with O3 and hydroxyl radical (HO) under near atmospheric pressure (750 1 Torr) and room temperature (298 1 K) in air and N2.O3 was produced in a silent discharge generator (OL 100/SB).Hydroxyl radicals were produced from the photolysis of isopropyl nitrite in the presence of NO.Kinetics of the reactions with O3/HO was studied using absolute and relative techniques by gas chromatography with mass spectroscopic detection (GC-MS).The gas phase reaction between elemental Hg 0 with O3, has been studied in different surface-to-volume (sly) ratios, and evidence for heterogeneous reactions was observed.Existence of mercuric oxide, HgO by the reaction of atomic Hg 0 with O3 has been determined in the gas phase from the suspended aerosols using high temperature mass spectrometry.
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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".