Electrocoagulation process applied to wastewater containing dyes from textile industry

In the present work, electrocoagulation was applied for the colour removal of solutions containing Direct red 81. Experiments were performed for synthetic solutions in batch mode. udy focuses on the effect of following operational parameters: electrolysis time, current density, initial pH, inter-electrode distance, initial dye concentration and type of supporting electrolyte. tained results showed that decolouration optimal conditions are the following: initial pH of about 6, current density of 1.875 mA/cm2, inter-electrode distance of 1.5 cm and finally the use of NaCl as supporting electrolyte. In best conditions, high decolouration efficiency was obtained, reaching more than 98% of colour removal. r transform infrared spectroscopy (FTIR) analysis was used to characterize the residual EC by-product with and without the presence of dye.