Title: Colour and COD removal from aqueous solutions of direct yellow 86 textile dyestuff by electro-Fenton method

Authors: Kasım Atmaca; Nevzat Beyazıt

Addresses: Department of Environmental Engineering, Ondokuz Mayıs University, Turkey ' Department of Environmental Engineering, Ondokuz Mayıs University, Turkey

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), H₂O₂ 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, H₂O₂: 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 H₂O₂ concentration and dye concentration had the highest effect on the removal efficiencies. It was determined that pollutant removal efficiencies increased with increasing H₂O₂ 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.

Keywords: COD removal; colour removal; electro-Fenton; direct yellow 86; removal efficiency.

DOI: 10.1504/IJGW.2020.107151

International Journal of Global Warming, 2020 Vol.20 No.4, pp.324 - 340

Received: 19 Sep 2019
Accepted: 16 Nov 2019
Published online: 04 May 2020 *

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