Utilizations of Electro-coagulated Sludge from Wastewater Treatment Plant data as an Adsorbent for Direct Red 28 Dye removal

Electro-coagulated, EC, sludge from the electrochemical processes of textile wastewater treatment plant can be reuse as an adsorbent for a certain cationic and anionic azo dyes from textile and or leather industry effluents. Because EC sludge expected to have iron oxide and hydroxide during the electrochemical processes of wastewater treatment, it can be used for adsorptions for azo dye removal. Produced EC sludge can have positively charged surface, specially ferric and or ferrous surface charge. Thus, EC sludge as an adsorbent will have adsorption potential to adsorb acidic (anionic) dyes in the principles of electrostatic attraction. To this study, the author intends to use direct red 28 (DR28) dyes as a modal azo dye from the textile and or leather industry. Basic batch adsorption parameters (effect of dye concentration, solution pH, reaction temperature, mixing time and adsorbent dosage), as well as adsorption isotherm, kinetics, and thermodynamics study on to raw and calcined EC sludge were investigated. DR28 dye on to calcined EC adsorbent has recorded as highly removal efficiency at pH of 2, initial dye concentration of 20mg/L, time of 60 min, adsorbent dosage 1g/100mL and temperature of 25±2℃, ambient temperature.