Degradation of Organic Pollutants in Wastewater by Bicarbonate-Activated Hydrogen Peroxide with a Supported Cobalt Catalyst

Developing novel technologies to cleanup wastewater has attracted attention for a long while in academic and industrial communities not only for environmental issues but also for recycling water sources. This work demonstrates that bicarbonate-activated H2O2 can be applied as a novel oxidant source...

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Bibliographic Details
Published in:Environmental science & technology 2013-04, Vol.47 (8), p.3833-3839
Main Authors: Zhou, Li, Song, Wei, Chen, Zhuqi, Yin, Guochuan
Format: Article
Language:English
Subjects:
Applied sciences
Benzoquinones - chemistry
Bicarbonates - chemistry
Biological Oxygen Demand Analysis
Catalysis
Catalysts
Chemical contaminants
Cobalt
Cobalt - chemistry
Exact sciences and technology
General purification processes
Hydrogen peroxide
Hydrogen Peroxide - chemistry
Ions
Kinetics
Leaching
Methylene Blue - chemistry
Organic Chemicals - isolation & purification
Phenols - chemistry
Pollutants
Pollution
Sodium Azide - chemistry
Spectrophotometry, Infrared
Temperature
tert-Butyl Alcohol - chemistry
Waste Water - chemistry
Wastewaters
Water Pollutants, Chemical - isolation & purification
Water treatment
Water treatment and pollution
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Summary:Developing novel technologies to cleanup wastewater has attracted attention for a long while in academic and industrial communities not only for environmental issues but also for recycling water sources. This work demonstrates that bicarbonate-activated H2O2 can be applied as a novel oxidant source in pollutant degradation. Using a supported cobalt catalyst, bicarbonate-activated H2O2 can efficiently degrade various dyes and phenol at ambient temperature. Because the reaction media remains weakly basic during degradation, the cobalt leaching from the solid catalyst has been efficiently avoided and the lifetime of the catalyst can be extended to above 180 h without significant activity loss in a fixed-bed test. Different scavengers, including ascorbic acid, t-butanol, sodium azide, benzoquinone, and tiron, have been tested to identify the active species, which may be involved in pollutant degradation, and it was found that singlet oxygen and the carbonate radical may play a key role in the degradation process.
ISSN:0013-936X
1520-5851
DOI:10.1021/es400101f