Studies on degradation of pulp and paper mill industrial dye fast red by indirect electrochemical method

Abstract

The indirect electrochemical degradation of industrial effluents has become an attractive method in recent years. This paper deals with the electrochemical degradation of pulp and paper mill industrial dye, Fast Red from aqueous solution using graphite carbon electrodes. The experimental results indicated that initial pH, supporting electrolyte and current density played an important role in the degradation of dye. During electrochemical degradation, the chromophoric groups and aromatic rings were destroyed. The decolourisation and degradation of the dye was followed using UV-Vis spectroscopy, FT-IR, LCMS, TOC and COD measurements. The maximum colour removal efficiency of 96% could be achieved for dye at 2.5 g.L-1 of NaCl concentration. The results revealed the suitability of the present process for the effective degradation of dye effluents. © 2019 Technoscience Publications. All rights reserved.