Discoloration of Basic Red 13 with Hybrid Process of Sonoelectrochemistry in Presence of TiO2 Nanoparticles

The decolorization conditions of aqueous solutions containing basic red 13 with sonoelectrochemistry system by titanium dioxide nanoparticles using central composite design was optimized. The effect of different parameters affecting on decolorization process, including time, the amount of TiO2 nanoparticles, initial pH and the applied potential was investigated. Based on the results, lowest amount of color removal at pH = 5.0 and the highest amount of decolorization in moderate alkaline environment (pH=8) has been achieved. Decolorization was increased by increment the amount of titanium dioxide nanoparticles to 0.68 g/l and then slightly decreases. By increasing the applied potential up to 0.85 V, the Decolorization increases with mild slope and then remains constant. The time of sonoelectrochemistry process has a direct effect on decolorization.The analysis of variance (ANOVA) showed that the main influencing factor was the pH and amount of TiO2 nanoparticles, the time and amount of applied potential followed in order to be effective. The optimum conditions for the degradation of dye were found to be as follows: pH= 8, time = 91 min, applied voltage = 0.85 V and nano TiO2 amount = 0.685 g/l. The present results showed that sonoelectrochemistry assisted by TiO2 nanoparticles have a good potential for dye removal from aqueous solution in the industrial application.