Performance of Chloride Ions on Electrocatalytic Oxidation Process Using Anode for Phenol Removal
Publication: Journal of Environmental Engineering
Volume 139, Issue 10
Abstract
The performance of the electrocatalytic oxidation of phenol on poly(diallyldimethylammonium chloride) (PDDA)–modified anodes in the presence of chloride ions was studied. The objective was to elucidate the influence of NaCl dosage, current density, initial phenol concentration, and initial pH on this catalysis process in the presence of . The results revealed that at low current densities, the presence of could greatly enhance the current efficiency by electrogenerating active chlorine, and the current density increased, but if competitive adsorption of radicals occurred, the removal efficiency did not improve significantly and the current efficiency decreased. This indicated that the pH value had a major impact on phenol, with optimal removal observed at approximately pH 6–7. In both acidic and alkaline solutions outside this optimal pH window, the removal efficiency deteriorated. The modified anode performs well for phenol degradation for a wide range of phenol concentrations under neutral conditions with an appropriate current density () and NaCl concentration (0.05 M).
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Acknowledgments
This work was funded by the Natural Science Foundation of China (Grant No. 51008154), the Jiangsu Natural Science Foundation (Grant No. SBK201022682), the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090091120007), the Fundamental Research Funds for the Central Universities (Grant No. 1112021101), and the Scientific Research Foundation of the Graduate School of Nanjing University (Grant No. 2010CL07). And special gratitude would go to reviewers for their kind help in improving this paper.
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Published In
Journal of Environmental Engineering
Volume 139 • Issue 10 • October 2013
Pages: 1297 - 1306
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 19, 2012
Accepted: May 16, 2013
Published online: May 18, 2013
Published in print: Oct 1, 2013
Discussion open until: Oct 18, 2013
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