Electrocoagulation of Methylene Blue using Graphene Oxide as Adsorbent

Abstract

This work has been carried out to minimize environmental pollution by investigation of efficient electrocoagulation of methylene blue by aluminum electrode cell setup using graphene oxide as adsorbent. The efficiency of dye removal was evaluated by the absorbance of methylene blue at 665 nm. The operating parameters for electrocoagulation such as current density (10-30 mA/cm 2), electrolysis time (5-20 minutes), pH of the medium (2 to 10), stirring speed (150-350 rpm), inter electrode distance (0.8 to 2 cm) and NaCl concentration (1.5-5.0 g/L) were optimized and found to be 30 mA/cm 2 , 20 min, pH 7.0, 300 rpm, 2 cm and 5 g/L respectively. The results showed that the dye removal efficiency was enhanced to 99% by the addition of graphene oxide. The result of the present research work can be useful for an efficient large-scale treatment of industrial effluents contaminated with methylene blue.