An activated carbon-MnO2 catalyst was prepared and used for chlorine dioxide catalytic oxidation of simulated o-chlorophenol wastewater. The COD removal efficiencies of chemical oxidation and catalytic oxidation are 28.6 and 93.5%, respectively. The COD removal efficiency of catalytic oxidation is greater than that of chemical oxidation at the same treatment condition. By using UV–Vis and online FTIR analysis technique, the intermediates during the degradation process were obtained. The benzene ring in o-chlorophenol was degraded into quinone and carboxylic acid, and finally changed into carbon dioxide and water during the catalytic oxidation. The degradation reaction mechanism of o-chlorophenol by chlorine dioxide catalytic oxidation was proposed based upon the experiment evidence.
Research on Chemical Intermediates – Springer Journals
Published: Feb 19, 2012
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