TURK 2025

Many factors such as population growth and the development of technological production cause domestic and industrial water demand to increase day by day. One of the most important production processes in the world is the textile products. In recent years, there has been growing interest in electrooxidation (EO) processes that convert pollutants into final intermediates or less toxic substances without the addition of secondary polluting chemicals. However, it is important to find easily accessible and inexpensive electrodes for EO techniques. In this study, industrial coke was used as a low-cost electrode material for efficient decolorization of the Reactive Orange 64 dye by the EO process in a fixed-bed reactor. The effect of different current densities (0.1-0.5 A), initial pH values (4-9), supported electrolyte type (NaCl, NaNO3, and Na2SO4), and supported electrolyte concentrations (1-4 g/L) were investigated. As a result, the TOC and RO 67 dye removal efficiency under optimum conditions (t = 50 mins, i = 0.5 A, initial pH = 7, and supported electrolyte 4 g NaCl/L) were found as 99.9 and 94.6%, respectively. Moreover, for the same conditions, energy consumption and total operating cost were calculated as 4.3 kWh/m3 and 0.7 US $/m3, respectively. These results show that using industrial coke has significant potential in the electrochemical oxidation process and superior performance in RO 67 dye removal.