Iron-Activated Persulfate Oxidation of an Azo Dye in Model Wastewater: Influence of Iron Activator Type on Process Optimization
Publication: Journal of Environmental Engineering
Volume 137, Issue 6
Abstract
The study explores the potential of iron-activated persulfate oxidation of an azo dye in model wastewater. The influence of the type of iron activator on process efficiency was investigated by using ferrous and zero valent iron. The Box-Behnken experimental design and response surface methodology were applied for the modeling of the and processes. The combined effect of three important process parameters was investigated and presented by the means of the quadratic polynomial model. The statistical analysis of model performance was evaluated by ANOVA. The optimal process conditions giving the maximal mineralization for both processes were determined: pH 4.81, , and predicting 35.14% mineralization and pH 5.52; and predicting 54.38% mineralization by the and processes, respectively. The predicted values of dye mineralization obtained by model equations were in good agreement with the experimental values. The type of iron activator was demonstrated to significantly influence both process efficiency and optimal conditions.
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Acknowledgments
We gratefully acknowledge the financial support from Ministry of Education, Science, and Sport, Republic of Croatia (UNSPECIFIEDProject No 125-1253092-1981).
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 137 • Issue 6 • June 2011
Pages: 454 - 463
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 31, 2010
Accepted: Dec 14, 2010
Published online: Dec 16, 2010
Published in print: Jun 1, 2011
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