Design and Evaluation of a Novel Light-Emitting Diode Photocatalytic Reactor for Water Treatment
Publication: Journal of Environmental Engineering
Volume 144, Issue 4
Abstract
In this paper, an ultraviolet light emitting diode–based immobilized photocatalytic reactor was designed, fabricated, and tested for water treatment. The performance of the reactor was evaluated by testing phenoxy pesticides and chlorophenols, and it was optimized by studying the degradation of 2,4-dichlorophenoxyacetic acid. The effect of operational parameters including light intensity, distance between light emitting diode module and photocatalytic plate, recirculation flow rate, and external electron scavengers on the reactor’s performance were investigated. Furthermore, the performance of immobilized photocatalytic plate (anodized nanotubes) was compared with slurry and hollow glass microspheres coated with anatase . A power law relationship between the light intensity () and first-order kinetics rate constants for 2,4-dichlorophenoxyacetic acid degradation was observed; a suitable circulation flow rate and the distance between light emitting diode module and photocatalytic plate was determined to achieve good degradation efficiency. Enhanced performance of the reactor was observed when was introduced.
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Acknowledgments
The authors acknowledge the financial assistance provided by the Natural Science and Engineering Council of Canada to conduct this research through support for the RES’EAU WaterNet strategic research network.
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 4 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 30, 2017
Accepted: Oct 10, 2017
Published online: Jan 31, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 30, 2018
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