COD Removal of Rhodamine B from Aqueous Solution by Electrochemical Treatment

Abstract

This study elucidates the COD removal of dye (Rhodamine B) through electrochemical reaction. Effects of current density (7.2 to 43.3 mA/cm 2), electrolyte type (NaCl, KCl, Na2SO4, HCl), electrolyte concentration (0.5 to 2.0 g/L), air flow rate (0 to 4 L/min) and pH (3 to 11) on the COD removal of Rhodamine B were investigated. The observed results showed that the increase of pH decrease the COD removal efficiency. Whereas, the increase of current density, NaCl concentration and air flow rate caused the increase of the COD removal of Rhodamine B.