Vol. 25, No. 3 (2026), IA26847 https://doi.org/10.24275/rmiq/IA26847

UV radiation-induced degradation of E133 dye using a Mn (II) Fenton-like process

 

Authors

H. López-García, C. Romo-Gómez, M. M. Meneses-López, C. Camacho-López, O. A. Acevedo-Sandoval, J. B. Leyva-Morales

Abstract

Brilliant Blue dye (E133) is a recalcitrant organic contaminant that is not removed from water by conventional treatment processes. However, the study of photo-Fenton-like processes using catalysts other than iron has emerged as an alternative for its degradation. Therefore, the capacity of Mn²⁺ for E133 degradation through a photo-Fenton-like process was evaluated. Assays were conducted based on a factorial design. The studied factors were pH (4, 7, and 9), E133 (1 and 5 mg L⁻¹), Mn (1 and 5 mg L⁻¹), and H₂O₂ (50 and 150 mg L⁻¹). The highest degradation efficiency and kinetic degradation constant of E133 were 72.68 ± 7.18 % and 8.90 ± 1.97 × 10⁻³ min⁻¹, respectively, obtained at pH 4 with E133 (1 mg L⁻¹), Mn²⁺ (5 mg L⁻¹), and H₂O₂ (150 mg L⁻¹). The use of Mn²⁺ in Fenton-like processes represents a promising alternative for E133 degradation.

Keywords

degradation; E133; photo-Fenton; manganese; advanced oxidation processes.

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