دورية أكاديمية
Singlet Oxygen Quantum Yields of Pyrogenic Dissolved Organic Matter from Lab-Prepared and Wildfire Chars
| العنوان: | Singlet Oxygen Quantum Yields of Pyrogenic Dissolved Organic Matter from Lab-Prepared and Wildfire Chars |
|---|---|
| المؤلفون: | Monika Madhiyan, Kyle J. Moor |
| سنة النشر: | 1753 |
| مصطلحات موضوعية: | Medicine, Ecology, Immunology, Plant Biology, Computational Biology, Space Science, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, lit surface waters, wood chars may, 365 nm compared, δ , prepared chars produced, 1 – 2, wildfire chars wildfires, real wildfire samples, 1 , 2 , prepared pydom generally, pine wood, wildfire char, values compared, state concentration, quantum yields, pyrogenic dom, pydom generated, predicted steady, excitation wavelengths, combusting oak |
| الوصف: | Wildfires or prescribed fires release pyrogenic dissolved organic matter (pyDOM) into the environment, which can photochemically produce singlet oxygen ( 1 O 2 ) in sun-lit surface waters. 1 O 2 quantum yields (Φ Δ ) are well-studied for non-pyrogenic DOM, but little is understood about the 1 O 2 generation from pyDOM, especially the Φ Δ values from real wildfire samples and their wavelength dependence. In this study, time-resolved 1 O 2 phosphorescence was used to determine the wavelength-dependent Φ Δ values for pyDOM generated from wildfire char and a series of lab-prepared chars produced by combusting oak and pine wood. Wildfire and most lab-prepared pyDOM generally had similar Φ Δ values (2.1–2.7%) at 365 nm compared to the reference Suwannee River Natural Organic Matter (SRNOM) isolate (2.4%). Interestingly, pyDOM from the highest combustion temperature char was found to possess extremely low Φ Δ values compared to SRNOM and other pyDOM at all excitation wavelengths. In addition, it was revealed that the predicted steady-state concentration of 1 O 2 from pyDOM was similar to that from SRNOM, indicating that the addition of pyDOM from wood chars may not strongly impact surface water photochemistry. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Singlet_Oxygen_Quantum_Yields_of_Pyrogenic_Dissolved_Organic_Matter_from_Lab-Prepared_and_Wildfire_Chars/24919398Test |
| DOI: | 10.1021/acs.est.3c03976.s001 |
| الإتاحة: | https://doi.org/10.1021/acs.est.3c03976.s001Test https://figshare.com/articles/journal_contribution/Singlet_Oxygen_Quantum_Yields_of_Pyrogenic_Dissolved_Organic_Matter_from_Lab-Prepared_and_Wildfire_Chars/24919398Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.C6B23F24 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.est.3c03976.s001 |
|---|