Investigation of Electrolysis Process Performance by GraphiteElectrodes for De-Colorization of Phenolphthalein and Phenol Redfrom Aqueous Solution

This study elucidates the de-colorization of phenolphthalein and phenol red from aqueous solution throughelectrochemical oxidation technique. An electrochemical reactor had 1 liter volume that used 2 graphite electrodes.Effect of electric power voltage, inter electrode distance and electrolyte concentration was investigated in thissystem.It was found that the optimum conditions for completely removal of phenolphthalein was at voltage of 48 V,retention time of 9 minutes, distance between the electrode of 5 cm, and the salt concentration of 1.5 g/l. Alsocompletely removal of phenol red was at voltage of 48 V, retention time of 8 minutes, distance between theelectrode of 5 cm, and the salt concentration of 2 g/l. Phenol red and phenolphthalein COD removal efficiency was85 and 80 percent respectively.The results suggest that the electrolysis process is an effective way to removal of phenolphthalein and phenol redcolor from effluent, because of it can completely remove the color in a short time

کلیدواژه ها:

De-colorization ، Electrolysis ، Graphite electrodes ، Phenolphthalein ، Phenol red