Title: Treatment of textile industry effluents by Fenton processes using galvanising industry residues

Authors: Lucas Rollin Hilsendeger; Dayane Gonzaga Domingos; Beatriz Lima Santos Klienchen Dalari; Amanda Dalalibera; Maria Eliza Nagel-Hassemer

Addresses: Sanitation and Environmental Engineering Department, Federal University of Santa Catarina, Trindade University Campus, Delfino Conti Street., P.O. Box 476, 88040-970, Florianópolis, Santa Catarina, Brazil ' Sanitation and Environmental Engineering Department, Federal University of Santa Catarina, Trindade University Campus, Delfino Conti Street., P.O. Box 476, 88040-970, Florianópolis, Santa Catarina, Brazil ' Sanitation and Environmental Engineering Department, Federal University of Santa Catarina, Trindade University Campus, Delfino Conti Street., P.O. Box 476, 88040-970, Florianópolis, Santa Catarina, Brazil ' Sanitation and Environmental Engineering Department, Federal University of Santa Catarina, Trindade University Campus, Delfino Conti Street., P.O. Box 476, 88040-970, Florianópolis, Santa Catarina, Brazil ' Sanitation and Environmental Engineering Department, Federal University of Santa Catarina, Trindade University Campus, Delfino Conti Street., P.O. Box 476, 88040-970, Florianópolis, Santa Catarina, Brazil

Abstract: Effluents from the textile industry pose a significant environmental threat due to their high concentration of toxic synthetic dyes and recalcitrant compounds. Advanced oxidation processes (AOPs) are a promising treatment option, but their high cost limits their practical application. This study used a liquid residue from the pickling stage of the galvanising industry as the acid and iron source to trigger Fenton's reactions for textile wastewater treatment. A Box-Behnken design with two independent variables (2 to 4 mL L^-1 pickling liquid residue and 70 to 210 mg L^-1 hydrogen peroxide) was used to conduct the experiments. The treatment resulted in 97% colour and 96% turbidity removal, as well as 60% toxicity reduction verified by the germination rate of Lactuca sativa seeds. The treatment also reduced Cr by 54%, Zn by 7%, and eliminated Fe from the final effluent. This method offers a cost-effective and efficient approach for treating textile wastewater.

Keywords: Fenton process; galvanising residue; textile wastewater; toxicity; advanced oxidation processes; AOPs.

DOI: 10.1504/IJEWM.2025.144992

International Journal of Environment and Waste Management, 2025 Vol.36 No.4, pp.419 - 437

Received: 05 Jan 2022
Accepted: 26 Nov 2022
Published online: 17 Mar 2025 *

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