Color Removal from Simulated Textile Effluents Using Clean Electrocoagulation Technique

Subject Areas : Polymer

Elham Keshmirizadeh ¹ , Roya Khosravi ² , Sabereh Mahdifar ³

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Received: 2015-11-16 Accepted : 2015-11-16 Published : 2012-10-01

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Abstract :

The present work was directed toward the successful ability of electerocoagulation to remove color from synthetic and simulated textile effluent by aluminum/iron electrodes. Two representative reactive dyes were selected for the synthetic dye system, a black dye alone and mixed dye (black, blue, red, 1:1:1 vol/vol). Several important operating parameters such as electrode material, initial pH(3-9), current density(60-120 A/m2 ), operating time (6-40), initial dye concentration (100-1200 mg/L) and solution conductivity (applied conductivity is better than literature) were studied in an attempt to reach higher color removal efficiency (%98). The chemical oxygen demand decreased by more than %87. The results of this work are comparable with those of recent studies. The electrical energy consumption in the above conditions was on order of 1.2-3.2 kWh/m3 of wastewater and the water recovery was 0.97m3 /m3 of wastewater, in this research “water recovery” was introduced and calculated in order to show the more economically feasible recycling of treated water. However the operating parameters used for the synthetic dye were less effective for treatment of simulated textile wastewater.