The efficiency and mechanisms of the enhancement of hydroquinone on the degradation of reactive red MX-5B by heterogeneous Fenton-like reaction
对苯二酚强化多相类-Fenton过程降解活性艳红MX-5B的效能与机理

In this study a Si-FeOOH heterogeneous catalyst for the Fenton-like reaction was prepared by sodium hydroxide precipitation. At room temperature, the influence of hydroquinone on the degradation of reactive red MX-5B by Fenton-like was investigated. This paper also studied the influencing factors of Fenton-like reaction on the decolorizing rate of reactive red MX-5B, such as pH, the dosages of H2O2, Si-FeOOH and reactive red MX-5B. The mechanisms of the degradation of reactive red MX-5B by Si-FeOOH/H2O2/hydroquinone system were also discussed. Experimental results showed that the effect of the degradation of reactive red by Si-FeOOH heterogeneous Fenton-like reaction under the addition of hydroquinone was remarkable. The optimal conditions were the initial concentration of reactive red MX-5B 10 mg·L-1, Hydroquinone dosage 0.55 mg·L-1, catalyst dosage100 mg·L-1, and H2O2 dosage 51mg·L-1 at pH of 3. Under these conditions, the removal of reactive red MX-5B could reach 94.69%. In addition, the decolorizing rate of the reactive red MX-5B was correlated with the iron ions concentration in the reaction system. This result indicated that in the heterogeneous Fenton-like reaction, apart from the surface adsorbed catalysis, there may exist a homogeneous catalysis effect similar to homogeneous Fenton-like reaction in the solution.