Catalytic Oxidation of Tartrazine in Aqueous Solution Using a Pillared Clay with Aluminum and Iron

In this work, pillared bentonite with Al−Fe (Al−Fe−PILC) was synthesized and used as a heterogeneous Fenton-like catalyst in the oxidation of tartrazine azo-dye an aqueous solution. The modification Al-Fe mixed system concentrated medium, ultrasound assisted intercalation carried out, obtained characterized by XRF, XRD, N2 adsorption at 77 K. Al−Fe−PILC, using different amounts H2O2, expressed multiple (1, 3, 6, 9) stoichiometry amount required to completely oxidize dye evaluated. reaction catalytic wet peroxide (CWPO) 400 mg Al−Fe−PILC 6 times stoichiometric H2O2 25 °C, reached 98.2±1.8% decolorization, 51.9±1.9% TOC removal 71.5±1.8% TN removal. Results study show that increased up certain limit. This process can be considered alternative for treating wastewater containing because takes place under mild experimental conditions (room temperature atmospheric pressure). Copyright © 2021 Authors, Published BCREC Group. is open access article CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).