Photo-Degradation of Acid Yellow 36 Dye Using ZnFe2O4 as a Photocatalyst

This study investigates the photocatalytic decolorization of Acid Yellow 36 dye using sintered ZnFe2O4 powder prepared at 500–900°C for 4 h. Photocatalytic experiments were conducted under artificial illumination using a Philips 250 W light source with an intensity of 1.48 × 10–7 Ens s–1. The decolorization process followed pseudo-first-order kinetics. Optimum conditions for decolorization were determined as an initial dye concentration of 50 mg/L, a ZnFe2O4 dose of 150 mg/100 mL, and an initial solution pH of 6.75. Under these conditions, a maximum dye removal efficiency of 88.18% was achieved within 100 min at 30°C. Increasing the reaction temperature enhanced the photocatalytic activity, with a positive enthalpy change (ΔH) of 20.55 kJ mol–1 and a low activation energy of 22.61 kJ mol–1. Additionally, the Fenton reaction using ZnFe2O4 nanopowder further enhanced the photodecolorization efficiency, demonstrating its potential as an effective photocatalyst for wastewater treatment.