1. Photosensitized Transformation of Hydrogen Peroxide in Dissolved Organic Matter Solutions under Simulated Solar Irradiation.
- Author
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Sha H, Yan S, Deng Y, and Song W
- Subjects
- Dissolved Organic Matter, Photosensitizing Agents, Wastewater, Hydrogen Peroxide, Photochemical Processes
- Abstract
Hydrogen peroxide plays an important role in photochemical processes in aquatic environments. However, whether it can be transformed by photoexcited chromophoric dissolved organic matter (CDOM) remains unclear. Therefore, this study examined the photosensitized degradation of H
2 O2 in CDOM-enriched solutions under simulated solar irradiation. Our results suggest that the presence of CDOM enhances the photodegradation rate of H2 O2 via the photosensitization process and· 2 O2 attenuation. Experimental results with model photosensitizers indicate that one-electron reducing species of CDOM (CDOM· -2 O2 to yield· · -· -2 O2 was estimated to be 1.5-fold greater than that with O2 . Furthermore, a wastewater effluent was exposed to simulated solar irradiation with the addition of H2 O2 , and the results demonstrated that the photodegradation of trace organic contaminants (TrOCs) was significantly enhanced by the increased· · 2 O2 by CDOM· -2 O2 enhancement could be a useful and economically beneficial advanced oxidation process for TrOC abatement.- Published
- 2022
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