Comparative Study Using Chemical Wet Oxidation for Removal of Reactive Black 5 in the Presence of Activated Carbon
Publication: Journal of Environmental Engineering
Volume 139, Issue 12
Abstract
The objective of this study was to assess the feasibility of various chemical wet oxidation techniques to remove azo dyes from wastewater. The performances of three different catalytic wet oxidation techniques were evaluated: catalytic wet air oxidation (CWAO), catalytic wet peroxide oxidation (CWPO), and hydrogen peroxide promoted wet air oxidation (PCWAO), using activated carbon as a catalyst to evaluate the degradation and decolorization of Reactive Black 5 in aqueous solution. The experiments were also conducted to investigate the optimum operating conditions of the processes, such as temperature, pH, activated carbon loading, loading, and reaction time. This investigation revealed that all of the wet oxidation techniques showed similar results and rather high removal efficiencies, but at different operating conditions. At the optimized conditions, the degradation was generally approximately 85% and decolorization was nearly 95% in each case. The operating conditions were as follows: in the CWAO process, higher temperature (70°C) and higher activated carbon loading () were used; in the CWPO process, a lower temperature () was used but a high amount of was added ( solution); and in the PCWAO process, a lower amount of was added ( solution) and higher temperature (70°C) was necessary to achieve the required performance.
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Acknowledgments
This study was supported by the Ege University Research Fund (09 MÜH 094).
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 139 • Issue 12 • December 2013
Pages: 1462 - 1469
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 27, 2012
Accepted: Jul 9, 2013
Published online: Nov 15, 2013
Published in print: Dec 1, 2013
Discussion open until: Apr 15, 2014
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