Brazilian Journal of Development ISSN: 2525-8761 102327 Brazilian Journal of Development, Curitiba, v.7, n.11, p. 102327-102347 nov. 2021 Evaluation of color removal efficiencies and kinetic parameters of Fenton (H2O2/Fe 2+ ) and photo-Fenton (H2O2/Fe 2+ /UV) processes in the treatment of a textile wastewater containing indigo blue Avaliação da eficiência de remoção de cor e parâmetros cinéticos dos processos de Fenton (H2O2/Fe 2+ ) e foto-Fenton (H2O2/Fe 2+/ UV) no tratamento de um efluente têxtil contendo corante azul índigo DOI:10.34117/bjdv7n11-044 Recebimento dos originais: 10/10/2021 Aceitação para publicação: 04/11/2021 Jean Cesar Benassi Mestre em Ciências – Programa: Têxtil e Moda - EACH/USP - School of Arts - Sciences and Humanities - Textile and Fashion Course - University of São Paulo Av. Arlindo Béttio, 1000 - Parque Ecológico do Tietê - Ermelino Matarazzo - São Paulo - SP E-mail: quimicojean@gmail.com Annie Alexandra Cerón Sánchez Ph.D em Ciências - Programa: Biotecnologia Industrial EEL/USP School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo Av. Arlindo Béttio, 1000 - Parque Ecológico do Tietê - Ermelino Matarazzo - São Paulo - SP E-mail: aacerons@usp.br Silgia Aparecida da Costa https: https://orcid.org/0000-0001-8331-538X Ph.D Engenharia Têxtil UMINHO/Portugal - School of Arts - Sciences and Humanities - Textile and Fashion Course - University of São Paulo Av. Arlindo Béttio, 1000 - Parque Ecológico do Tietê - Ermelino Matarazzo - São Paulo - SP E-mail: silgia@usp.br Sirlene Maria da Costa Ph.D Biotecnologia Industrial FAENQUIL atual EEL/USP - School of Arts Sciences and Humanities - Textile and Fashion Course - University of São Paulo Av. Arlindo Béttio, 1000 - Parque Ecológico do Tietê - Ermelino Matarazzo - São Paulo - SP E-mail: sirlene@usp.br ABSTRACT The textile industry uses Indigo blue dye extensively in the production of jeans. Thus, high volumes of wastewater containing dye are obtained and must be treated before being discharged. The color removal efficiencies of indigo blue dye synthetic wastewater after treatment by Advanced Oxidative Processes (AOPs) using Fenton (H2O2/Fe 2+ ) and photo-Fenton (H2O2/Fe 2+/ UV) was evaluated in this work. The experiments were conducted at pH 2.8 and evaluated the influence of the amount of [H2O2]/[Fe 2+ ], the use of sulfuric acid and citric acid to adjust the pH, the initial concentration of the indigo dye, and the dosage form of H2O2 - the kinetic parameters and BMG model were also evaluated. The use of sulfuric acid to adjust the pH was more efficient in removing the color. The highest color removal rates were 70.78 ± 2.96 % after 180 min and 64.22 ± 2.08 % after 60 min, respectively, for the Fenton and photo-Fenton