Simulated Sunlight Enhanced X3B Degradation by Persulfate Activated with Steel Slag
Publication: Journal of Environmental Engineering
Volume 142, Issue 1
Abstract
The degradation of reactive brilliant red X-3B (X3B) in a simulated slag system at near neutral pH has been studied. The influence of initial pH value, persulfate concentration, quantity of steel slag, and temperature on the degradation of X3B in aqueous solution were investigated. Up to 79.2% of X3B was removed in the simulated slag system within 5 min at a pH of 6.0. Simulated sunlight played a catalytic role in the slag system and resulted in an enhancement of X3B degradation of approximately 11%. The degradation of X3B decreased with an increasing pH in the solution, whereas high temperature facilitated the activation of persulfate. The cycling of facilitated the reuse of steel slag under simulated sunlight irradiation. The steel slag was passivated after coming into contact with the oxidant within 1 min. The sequential addition of steel slag promoted X3B degradation, yielding a removal efficiency of 91%.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51078161) and Natural Science Foundation of Hubei Province (No. 2010CDB01104). The authors also thank the Analytical and Testing Center of Huazhong University of Science and Technology for its help in the characterization of the activator.
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Published In
Journal of Environmental Engineering
Volume 142 • Issue 1 • January 2016
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© 2015 American Society of Civil Engineers.
History
Received: Aug 6, 2014
Accepted: Jun 3, 2015
Published online: Aug 11, 2015
Published in print: Jan 1, 2016
Discussion open until: Jan 11, 2016
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