Electro-Fenton method for dye removal of agro-industrial wastewater from flower production

Removal of recalcitrant dyes from agroindustrial wastewater produced in flower processes represents a significant environmental challenge for flower industries worldwide. Advanced oxidation processes (AOPs) emerge as a clean and effective costly alternative for removing dye contaminants in wastewater. This study used an electro-Fenton technique as an alternative for the treatment of colored wastewater from flower-producing crops in Colombia. Initially, the physicochemical characterization of the wastewater was carried out by Chemical Oxygen Demand (COD), color, pH, conductivity, temperature, and oxidation-reduction potential. Subsequently, an electrochemical process was carried out through a power source and six iron electrodes. Variables, such as hydrogen peroxide concentration (۵۰۰ and ۷۰۰ mg/l H۲O۲), amperage (۱ and ۲ A), and treatment time (۶۰ and ۹۰ minutes), were controlled. Based on a desirability function for multiple response analysis, the electro-Fenton process allowed a maximum COD removal of ۸۰.۹% and ۸۸.۵% for color (desirability criterion of ۸۶%). Residence time in the reactor, voltage, current density, and concentration of hydrogen peroxide were the most significant variables. Finally, the role of other physicochemical variables involved during the dye degradation process was explained.

کلیدواژه ها:

Advanced Oxidation Processes ، Agro-industrial wastewater ، colored water ، electrochemistry ، flower industry ، water pollution ، Color removal ، Electro Fenton