Indonesia Conference Directory

Methylene Blue (MB) is a dye commonly used in the textile industry. Dyes waste from the textile industry harms the ecosystem of the environment. One method of textile dye waste degradation is mediated electrochemical oxidation. This method uses an oxidation-reduction process using metal ion as a mediator. The mediator metal ion acts as an oxidizer which oxidizes textile dyes waste into simpler compounds, namely CO2 and H2O. The mediator ion used in this study was Ce (IV) in an acidic. The results of the degradation were analyzed using the voltammetry method. In voltammetry there are three electrodes are used, namely working electrode, reference electrode, and auxiliary electrode. This study used a carbon paste electrode as a working electrode, a platinum wire as an auxiliary electrode and a homemade Ag/AgCl as a reference electrode. The results of the characterization of the Ag/AgCl reference electrode showed that the Ag/AgCl had the same characteristics as the BAS commercial reference electrodes (bioanalytical systems). The results of cyclic voltammogram showed that the oxidation potential value of MB is 0.2880 V. The oxidation and reduction potential of Ce (III)/Ce (IV) in 0.2 M H2SO4 were 1.2400 V and 0.4520 V. This potential value indicates that the MB oxidation potential was not disturbed by the mediator ion potential. The optimum condition of electrodegradation was obtained at 250 ppm MB in 0.2 M H2SO4 with the addition of 0.015 M Ce (III) for 30 minutes using the potential of 6 V.