Effect of electrochemical operational parameters on decolourisation of reactive red-195 using batch process

Reactive red-195 synthetic solution of dye was investigated over different operational parameters in simple electrochemical cell for decolourisation. Effect of operational parameters such as variation in applied electrical potential, electrolyte concentration, dye concentration, inter electrode distance (S), cathode material, H2O2 dose and electrolysis time were analysed separately in batch process using iron electrodes. Potential of 20 volts is optimised and applied to successive experiments, considering colour removal efficiency and energy consumption. 100% colour removal was achieved in 4 min for H2O2 dose of 6.0ml/L and 2.5gm/L of NaCl respectively. Similarly increase in gap between electrodes to 4.0 cm and concentration of dye to 100 mg/L, process required 18 min to achieve 100% colour removal. Fe-Al and Fe-Steel combination gave good results at initial, but Fe-Fe and Fe-Al gave 100% colour removal at earliest, compared to Fe-Steel. Electrochemical process may prove efficient in such treatments.