A bench-scale electrochemical peroxidation reactor performance on removal of organic pollutants from tannery industrial wastewater.

Gopal, Selvabharathi; Somanathan, Adishkumar; Jeyakumar, Rajesh Banu; Fernandez, Carlos

Abstract

The aim of this study is to evaluate the performance of a novel laboratory scale electrochemical peroxidation (ECP) reactor using iron (Fe) electrodes (anode and cathode) for treatment of tannery wastewater. In order to minimize operating cost, the effects of operating parameters were determined, and response surface methodology was used to optimize the operating parameters. The operating parameters were initial pH 2.2-8.4, H2O2 dosage 0-0.02 g/L, Fe2+ dosage 0-0.005 g/L and current density 10-40 mA/cm2. Under the optimum conditions, the ECP process revealed better performance in terms of chemical oxygen demand (COD) removal with an average value of 85% in contrast to 65% removal in electro-Fenton (EF) process. Analysis and comparison of the data revealed that ECP process delivered a better treatment performance than EF process, taking into account that the optimum electrolysis time and applied current density were considerably. Overall, these results confirmed that the novel ECP reactor using Fe electrodes can reduce the operating cost and be proposed as a pragmatic approach to remove maximum amount of colour, COD, and chromium(III) from tannery wastewater.

Citation

GOPAL, S., SOMANATHAN, A., JEYAKUMAR, R. and FERNANDEZ, C. 2022. A bench-scale electrochemical peroxidation reactor performance on removal of organic pollutants from tannery industrial wastewater. Desalination and water treatment [online], 277, pages 120-135. Available from: https://doi.org/10.5004/dwt.2022.29039

• Journal Article Type: Article
• Acceptance Date: Oct 13, 2022
• Online Publication Date: Nov 30, 2022
• Publication Date: Nov 30, 2022
• Deposit Date: Sep 21, 2023
• Publicly Available Date: Sep 21, 2023
• Journal: Desalination and water treatment
• Print ISSN: 1944-3994
• Electronic ISSN: 1944-3986
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 277
• Pages: 120-135
• DOI: https://doi.org/10.5004/dwt.2022.29039
• Keywords: Tannery wastewater; Electrochemical peroxidation; Iron electrodes; Central composite design; Colour removal; Chemical oxygen demand reduction; Electrical energy consumption
• Public URL: https://rgu-repository.worktribe.com/output/2035315