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Hydroxyl Radical Photoproduction in the Sea and Its Potential Impact on Marine Processes
Abstract
Photochemical production rates and steady-state concentrations of hydroxyl radicals (⋅OH) were measured in sunlight-irradiated seawater. Values ranged from 110 nanomolar per hour and 12 × 10 -18 molar in coastal surface water to 10 nanomolar per hour and 1.1 × 10 -18 molar in open ocean surface water. The wavelengths responsible for this production are in the ultraviolet B region (280 to 320 nanometers) of the solar spectrum. Dissolved organic matter (DOM) appears to be the main source for ⋅OH over most of the oceans, but in upwelling areas nitrite and nitrate photolysis may also be important. DOM in the deep sea is degraded more readily by ⋅OH (and its daughter radicals), by a factor of 6 to 15, than is DOM in open-ocean surface water. This finding may in part bear on major discrepancies among current methods for measuring dissolved organic carbon in seawater.
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Cited by
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Ellison, G. B., Tuck, A. F., & Vaida, V. (1999) · Journal of Geophysical Research: Atmospheres · doi:10.1029/1999jd900073 · Cited by 448
Organic Photocatalysts for the Oxidation of Pollutants and Model Compounds
Marin, M. L., Santos-Juanes, L., Arques, A., Amat, A. M., & Miranda, M. A. (2012) · Chemical Reviews · doi:10.1021/cr2000543 · Cited by 426
Photogeneration of reactive oxygen species from biochar suspension for diethyl phthalate degradation
Fang, G., Liu, C., Wang, Y., Dionysiou, D. D., & Zhou, D. (2017) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2017.05.036 · Cited by 361
Photodegradation Processes of the Antiepileptic Drug Carbamazepine, Relevant To Estuarine Waters
Chiron, S., Minero, C., & Vione, D. (2006) · Environmental Science & Technology · doi:10.1021/es060502y · Cited by 306
Metadata
- Authors
- Mopper, K., & Zhou, X.
- Venue
- Science
- Published
- 1990-11-02
- Volume
- 250
- Issue
- 4981
- Pages
- 661-664
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1983822766
- Cited by
- 544
- References
- 0
- FWCI
- 7.98
- Type
- journal article
- Language
- en
- Open access
- closed
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- Mopper, K., & Zhou, X. (1990). Hydroxyl Radical Photoproduction in the Sea and Its Potential Impact on Marine Processes. Science. https://doi.org/10.1126/science.250.4981.661
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