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 interme- diates 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 .I n 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.
Published Version
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