A study on the degradation of synthetic dyes using tubular electrochemical reactor

The aim of the research is to investigate the degradation of synthetic dyes, which are widely utilized in numerous textile sectors. In this study, we used electrochemical oxidation as the primary method for dye degradation, with a mixed metal oxide anode and a stainless-steel cathode. Three different dyes were used to evaluate the degradation: methylene blue, brilliant green, and fast sulphon black F. The supporting electrolyte for the experiment was sodium chloride, and the tests were conducted for 10 min while adjusting the synthetic effluent flow rate (30, 90, 120 LPM), supporting electrolyte concentration (1, 3, 5 g/L), and current density (0.32, 0.81, 1.59 A/dm(2)). The maximum color removal (95%) elimination using UV-Vis Spectrophotometer at 10 min of operation time, was seen for all dyes at 1.59 A/dm(2), 5 g/L, and 90 LPM. In the dye degradation kinetics, the hydroxyl radical plays an important role. The synthetic dye degradation rate constant (k(h)) was determined to be 0.49 x 10(-2) cm/s, and the half-life period h(1/2) was found to be 1.41603 min(-1). As a result, the suggested study was highly effective in degrading synthetic dyes in a shorter period of time with lower current density value.