Electrodecolorization of remazol violet with graphite electrodes : Application of Statistical Designs and Regression Analysis

Abstract

The electrodecolorization process of the remazol violet (RV) dye using graphite as an electrode has been done well. The RV is one of the synthetic dyes that are often used in the textile, paper, and other coloring industries. The parameters used in this study were RV concentration (20 mg/L-100 mg/L), pH (2-10), electrodecolorization time (2 minutes-20 minutes), volume H2O2 (0 mL-12 mL) and voltage (2 V-12 V). Based on experiments of 20 data that have been investigated then made the design of statistical model. The application of statistical design and regression analysis in this research is tested the feasibility, then tested by building data based on experimental data as amount 87319 data. This design is supported by ANOVA test, RMSE value, and ADD as the strengthening of the resulting model. Based on this study, the optimum conditions for pH parameters, electrodecolorization process time, H2O2 volume, RV concentration and voltage are 4;10 minutes;10 mL;20 mg/L; and 2V with a percentage of decolorization of 83.50%. The p-value results of the ANOVA test, the RMSE value, and ADD sequentially from this study are 0.002; 0,000; 0.201 so that the resulting model can be recommended for the application in dye waste management.