Textile Industries Wastewater Treatment by Electrochemical Oxidation Technique Using Metal Plate

摘要

In this study, the optimization of electrochemical oxidation technique for textile wastewater treatmentand analysis of the degradation product was experimentally investigated. After some preliminarystudies using C.I. Reactive Blue 109, platinum plate electrode (10 mm x 10 mm) and stainless steel (10mm x 10 mm) were chosen as the best anode and cathode, respectively. The effects of operationalparameters such as supporting electrolyte (sodium chloride) concentration, current density, initial pHand electrolysis time on pH changes and percentage of color, chemical oxidation demand (COD),biochemical oxidation demand (BOD), total organic carbon (TOC) and surfactant removal weredetermined. The optimum range for each of these operating variables was experimentally determined.The results obtained show that the percentage of color, COD, BOD, TOC and surfactant removal in theaqueous phase was removed effectively. Under the optimum operating conditions, sodium chloride2 concentration of 0.1 M, current density of 20.0 mA/cm , initial pH of 4 and electrolysis time of 75minutes, the percentage of color and COD removals efficiency reached 96%, while for BOD, TOC andsurfactant removals the percentage is slightly lower. UV-visible spectra and Fourier transform infraredspectroscopy (FTIR) analysis also shows the cleavage of chromophore group and degradation of textilewastewater during before and after electrolysis.