Journal article
Fructose as a novel photosensitizer: Characterization of reactive oxygen species and an application in degradation of diuron and chlorpyrifos
Chemosphere (Oxford), v 144, pp 1690-1697
Feb 2016
PMID: 26519800
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The objective of this study was to identify reactive oxygen species (ROS) generated from the exposure of fructose solution to the 254 nm ultraviolet (UV) light and evaluate whether fructose can be used as a photosensitizer for accelerated photo-degradation of diuron and chlorpyrifos. We demonstrated that hydrogen peroxide, singlet oxygen (1O2) and acidic photolysis products were generated upon UV exposure of fructose. Consistent with these findings, UV induced degradation of chlorpyrifos and diuron was accelerated by the presence of 500 mM fructose. The average first order photo-degradation rate constants in the absence and presence of 500 mM fructose were 0.92 and 2.07 min−1 respectively for diuron and 0.04 and 0.07 min−1 for chlorpyrifos. The quantum yields (ɸ) for direct photo-degradation of diuron and chlorpyrifos were 0.003 and 0.001 respectively. In the presence of 500 mM fructose, these values increased to 0.006 and 0.002 respectively. Thus, fructose may be an effective photosensitizer.
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•Fructose underwent photolysis upon exposure to 254 nm UV light.•Photolysis products include hydrogen peroxide, singlet oxygen and hydroxyl radicals.•Fructose accelerated UV induced photocatalytic degradation of diuron and chlorpyrifos.•Fructose is an attractive photosensitizer for decontamination of waste-water.
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Details
- Title
- Fructose as a novel photosensitizer: Characterization of reactive oxygen species and an application in degradation of diuron and chlorpyrifos
- Creators
- Shaila Nayak - Drexel UniversityJuan Muniz - Drexel UniversityChristopher M. Sales - Drexel UniversityRohan V. Tikekar - University of Maryland, College Park
- Publication Details
- Chemosphere (Oxford), v 144, pp 1690-1697
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000367774400214
- Scopus ID
- 2-s2.0-84953791057
- Other Identifier
- 991019169692904721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Environmental Sciences