Removal of Methylene Blue by Direct Electrochemical Oxidation Method Using a Graphite Anode

International Conference on Materials Engineering and Science

Jawad, Noor H.^1 ; Najim, Sarmad T.^1

Chemical Engineering Department, Al-Nahrain University, Iraq^1

关键词: Direct electrochemical oxidation;    Electrolyte temperature;    Industrial wastewater treatment;    Initial concentration;    Initial dye concentration;    Methylene Blue;    Pseudo-first order reactions;    Supporting electrolyte;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/454/1/012023/pdf
DOI  :  10.1088/1757-899X/454/1/012023

来源: IOP

【 摘 要 】

The present work is to degrade methylene blue dye from aqueous solution by direct electrochemical oxidation technique. For this purpose an electrochemical cell was used comprising of two electrodes made from graphite as anode and stainless steel 316 grade as cathode. Different operating parameters that affected the treatment process such as current density, electrolyte temperature and initial dye concentration had also been studied. The reaction mechanism of direct anodic oxidation of M.B. is undertaken and the kinetic follows a pseudo first order reaction. Results revealed that at 20°C electrolyte temperature, 10 mA/cm2 current density, 0.5 g/l Na2SO4 as supporting electrolyte and 60 min electrolysis time, the decolorization percents for initial concentrations of M.B. 50 and 400 mg/L were 72.51% and 77.94% respectively while at 60°C the decolorization percent 99.75% and 99.60% respectively for the same others operating conditions. The power consumption increased from 2.055 to 11.714 Kw.h/m3 at applied voltage 14.6 V and 28.5 V respectively.