Abstract
Electrochemical oxidation of an azo dye (Reactive Red 120) was studied in acidic media (1 M HClO4) using DSA type (Ti/IrO2–RuO2) and boron doped diamond (BDD) anodes. Ti/IrO2–RuO2 exhibited low oxidation power with high selectivity to organic intermediates and low TOC removal (10% at 25 °C and 40% at 80 °C). On the other hand BDD was found to be suitable for total mineralization of the organic loading to CO2. In both cases, the decoloration of the solution was almost 100% achieved very quickly with BDD (2 Ah L−1) but only after long treatment with Ti/IrO2–RuO2 (25 Ah L−1). The instantaneous current efficiency (ICE) was up to 0.13 in the case of Ti/IrO2–RuO2 and up to 0.45 in the case of BDD.
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Acknowledgments
We would like to thank the reviewers for their thorough review and numerous helpful suggestions. We also thank Technical University of Crete for financial support.
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Panakoulias, T., Kalatzis, P., Kalderis, D. et al. Electrochemical degradation of Reactive Red 120 using DSA and BDD anodes. J Appl Electrochem 40, 1759–1765 (2010). https://doi.org/10.1007/s10800-010-0138-2
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DOI: https://doi.org/10.1007/s10800-010-0138-2