Kinetic and thermodynamic study of oxidative degradation of acid yellow 17 dye by Fenton-like process: Effect of HCO3−, CO32−, Cl− and SO42− on dye degradation

Abstract

We report here the degradation of AY-17 dye using Fenton-like process (H₂O₂/Fe³⁺). The maximum degradation (83%) of AY17 dye is achieved at pH 3 in 60 min, with optimum concentrations of AY 17 (0.06 mM), H₂O₂ (0.9 mM), and Fe²⁺ (0.06 mM). The scavenging effects of HCO₃⁻, CO₃²⁻, Cl⁻ and SO₄²⁻ on dye degradation are also examined. The activation energy (E_a), activation enthalpy (rH^*), and activation entropy (rS^*) are calculated for the dye degradation using pseudo-first-order kinetics at various temperature.

KEY WORDS: Acid Yellow 17, H₂O₂/Fe³⁺, Fenton-like process, Oxidative degradation, Scavenging effects

Bull. Chem. Soc. Ethiop. 2019, 33(2), 243-254.

DOI: https://dx.doi.org/10.4314/bcse.v33i2.5