Electrochemical decolorization of direct black textile dye wastewater

Abstract EN

Electrochemical decolonization of direct black textile dye was studied in the presence of sodium hydroxide (NaCl).

Electrochemical cell occupy about 1 liter of working electrolyte supplied with graphite electrodes for both anode and cathode was constructed for this purpose.

Decolonization percent, treatment time, power consumption, and pH were studied as a function of the applied voltage and salt concentration.

Results show that decolonization increase with increasing salt concentration and applied voltage.

Best decolonization of 86 % can be achieved after 17 min at 7 volt and 5 g / l salt concentration.

Further decolonization can be achieved but this will be accompanied with a sharp increase in power consumption.

No significant decrease in pH value was observed at the end of each experiment.