Kinetics of Surface-Bound Benzo[<i>a</i>]pyrene and Ozone on Solid Organic and Salt Aerosols
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
An aerosol flow tube apparatus was developed to perform the first kinetic study of the oxidation of particulate-bound BaP on solid organic and salt aerosols by gas-phase ozone. The studies on azelaic acid aerosols were performed with submonolayer coatings of BaP under both dry (RH < 1%) and high relative humidity (RH ∼ 72%) conditions. The reaction exhibited pseudo-first-order kinetics for BaP loss and the pseudo-first-order rate coefficients displayed a Langmuir−Hinshelwood dependence on gas-phase ozone concentration. Under high relative humidity conditions the kinetics were faster but also displayed a similar functional dependence on the gas-phase ozone concentration. By assuming Langmuir−Hinshelwood behavior, the following parameters were obtained: ozone-surface equilibrium constant K O3 (< 1% RH) = (1.2 ± 0.4) × 10 -15 cm -3, K O3 (72% RH) = (2.8 ± 1.4) × 10 -15 cm -3, the maximum pseudo-first-order rate coefficient (< 1% RH) = (0.048 ± 0.008) s -1, (72% RH) = (0.060 ± 0.018) s -1 . Uptake coefficients were extracted from the pseudo-first-order rate coefficients and a slight trend of decreasing uptake coefficients with increasing ozone concentration was observed. In contrast to the behavior on azelaic acid aerosols, no reaction was observed between ozone and BaP adsorbed to solid NaCl particles. These results are compared to previous studies, which have been performed on different substrates, and their atmospheric implications are discussed. We conclude that a strong substrate effect prevails in this reaction with the kinetics proceeding faster on surfaces best able to adsorb ozone.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 it