Feasibility Study of the Decolorization of Simulated Rhodamine B Dye Wastewater with a Three-dimensional Electrode Reactor

In this paper, the decolorization of simulated rhodamine B dye wastewater was investigated using a three dimensional electrode reactor with granular activated carbon(GAC) loaded with manganese oxide (MnO_x/GAC) as the particle electrode. The decolorization ratio by two-dimensional electrode, traditional three-dimensional electrode and MnO_x/GAC three-dimensional electrode method was compared respectively, and simultaneously, the effect of treatment time, voltage and pH on the color removal efficiency was studied. The experimental results showed that the decolorization ratio of MnO_x/GAC three-dimensional electrode is much higher than that of two-dimensional electrode or traditional three-dimensional electrode. While the concentration of the simulated rhodamine B dye wastewater was 50 mg/L, the decolorization ratio by MnO_x/GAC three dimensional electrode can reach 98.9% under the condition of the voltage 11V, the initial pH 5 and the treatment time 120min.