Improvement of the Homogeneous Fenton Reaction for Degradation of Methylene Blue and Acid Orange II

抄録

In this study, the degradation of methylene blue (MB) and acid orange II (ORII) by the Fenton reaction was improved by using HCl and HNO₃. In addition, the effects of pH, temperature, concentration of Fenton’s reagent, and adjustment reagent of solution pH on the decoloration were evaluated. The results showed that the optimal pH for decoloration of MB and ORII was 2.5 and that the decoloration of MB and ORII increased with higher temperature and concentration of Fenton’s reagent. Moreover, the decoloration in the Fenton-reaction process with HCl and HNO₃ was greater than the decoloration with H₂SO₄ by approximately 4.3–5.6 and 1.7–5.6 times for MB and 3.2–3.6 and 4.6–7.2 times for ORII compared to with H₂SO₄. These results indicated that Fenton-reaction with HCl and HNO₃ could be useful for the degradation technology of dyes compared to generally Fenton-reactions.