Integration of Electrocoagulation, Electro-Fenton Processes for Treatment of High Concentration Dye Solutions

Abstract

Discharge of synthetic dyes from industrial effluents to the environment is very important issue for getting good quality water and healthy ecosystems. Therefore, there is a need to apply appropriate novel treatment solutions prior to discharging them into the environment. Also, the use of well treated wastewater in the textile industry will be a sustainable answer to large demand of water consumptions in this industry. In electrocoagulation (EC), current passes through electrolyte solution between electrodes and sacrificial anode were started to dissolve resulting high metal ion concentrations and can create hydroxide ion species depending of pH value. These hydroxide species can serve as coagulants and remove dye molecules from the wastewater. In electro-Fenton process (EF), Fe electrodewas used to get in situ of Fe2+ ions and necessarily hydrogen peroxide (H2O2) is externally added in solution for generation of the hydroxyl radicals to degrade dye molecules in wastewater. The use sequential and/or integrated different treatment processes can maximize dye removal efficiency. Therefore, the aim of presentation is to investigate the integration of EC and EF removal process of high concentration of different dyes from aqueous solutions. Effect of the sequential use of EC and EF processes with iron plate electrodes were examined in terms of high concentration of dye removal to get complete dye removal processes.