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Microheterogeneity of Singlet Oxygen Distributions in Irradiated Humic Acid Solutions
Abstract
Singlet oxygen ( 1 O 2 ) is a highly reactive species formed through solar irradiation of organic matter in environmental waters. Implicated in a range of reactions, it has proven difficult to quantify its spatial distribution in natural waters. We assessed the microheterogeneous distribution of 1 O 2 in irradiated solutions containing chromophoric dissolved organic matter (CDOM) by using molecular probes of varying hydrophobicity. The apparent 1 O 2 concentrations ([ 1 O 2 ] app ), measured by recently developed hydrophobic trap-and-trigger chemiluminescent probe molecules, were orders of magnitude higher than those measured by the conventional hydrophilic probe molecule furfuryl alcohol. The differential [ 1 O 2 ] app values measured by these probes reflect a steep concentration gradient between the CDOM macromolecules and the aqueous phase. A detailed kinetic model based on the data predicts probabilistic 1 O 2 distributions under different solvent conditions.
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Cited by
Zhu, S., Huang, X., Ma, F., Wang, L., Duan, X., & Wang, S. (2018) · Environmental Science & Technology · doi:10.1021/acs.est.8b01817 · Cited by 1,179
Multiple Roles of Dissolved Organic Matter in Advanced Oxidation Processes
Yang, X., Rosario-Ortiz, F. L., Lei, Y., Pan, Y., Lei, X., & Westerhoff, P. (2022) · Environmental Science & Technology · doi:10.1021/acs.est.2c01017 · Cited by 459
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
The microbial contribution to reactive oxygen species dynamics in marine ecosystems
Zinser, E. R. (2018) · Environmental Microbiology Reports · doi:10.1111/1758-2229.12626 · Cited by 78
Photo-induced toxicity of pesticides in aqueous environment: A review
Fan, L., Zhang, X., Zang, S., & Wang, H. (2023) · Journal of Cleaner Production · doi:10.1016/j.jclepro.2023.136726 · Cited by 20
Metadata
- Authors
- Latch, D. E., & McNeill, K.
- Venue
- Science
- Published
- 2006-03-24
- Volume
- 311
- Issue
- 5768
- Pages
- 1743-1747
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2074196765
- Cited by
- 398
- References
- 0
- FWCI
- 12.17
- Type
- journal article
- Language
- en
- Open access
- closed
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