Colour and COD Removal From Aqueous Solutions of Direct Yellow 86 Textile Dyestuff by Electro-Fenton Method

Abstract

In this study, COD and colour removal were investigated by the electro-Fenton method from aqueous solutions of direct yellow 86 commercial textile dyes. The effects of electrolyte concentration (250-3,000 mg/L), H<inf>2</inf>O<inf>2</inf> concentration (250-3,000 mg/L), the initial dye concentration (50-500 mg/L), the distance of anode-cathode (0.5-1.5 cm) on COD and colour removals were investigated. Under optimal experimental conditions (NaCl: 1,500 mg/L, H<inf>2</inf>O<inf>2</inf>: 1,500 mg/L, the initial dye concentration: 50 mg/L, the distance of anode-cathode: 1.5 cm), the maximum COD and colour removal efficiencies were 95.3% and 99.5%, respectively. It was determined that H<inf>2</inf>O<inf>2</inf> concentration and dye concentration had the highest effect on the removal efficiencies. It was determined that pollutant removal efficiencies increased with increasing H<inf>2</inf>O<inf>2</inf> concentration, and decreased with increasing initial dye concentration. The results showed that the electro-Fenton method can be effectively applied in COD and colour removal from aqueous solutions of direct yellow 86 commercial textile dyestuff. © © 2020 Inderscience Enterprises Ltd.