二茂铁催化光助非均相类Fenton氧化法处理含罗丹明B废水

采用二茂铁(Fc)替代UV/Fenton体系中的催化剂Fe2+,构建了一个新的UV/H2O2/Fc非均相Fenton反应体系,研究了该反应体系对含罗丹明B模拟废水的脱色性能.结果表明,Fc对水中UV/Fenton反应具有良好的催化活性,对罗丹明B起氧化作用的主要物质是·OH和其他活性物质.对水中罗丹明B的氧化脱色反应的催化性稳定,对Fc重复回收利用3次后对模拟废水仍有99%以上的脱色率;UV/H2O2/Fc体系处理罗丹明B的最佳工艺条件是H2O2的浓度为1.5′10-2mol/L,Fc的投加量为0.13g/L,初始pH值在2~6之间.证实了Fc作为光助非均相Fenton体系催化剂的可能性.

Photo-assisted degradation of rhodamine B by Ferrocene-catalyzed heterogeneous Fenton-like reaction

Ferrocene(Fc) was used as a substitute for catalyst of heterogeneous Fenton-like reaction, ferrous ion (Fe2+). Consequently, a new UV/Fc/H2O2 heterogeneous Fenton-like reaction system was established. The decolourization capacity of the new reaction system to rhodamine B-contained simulated wastewater was experimentally examined. Fc could efficiently catalyze aqueous heterogeneous Fenton-like reaction. Accordingly, ?OH and the other similar reactive intermediates dominated the oxidative degradation of rhodamine B. Steady catalysis capacity of the new reaction system to the oxidative decolourazation process of rhodamine B was observed also. Even Fc was reclaimed and reused for three times, the decolourazation ration to the simulated wastewater was still higher than 99%. The proposed optimal processing conditions for decolourization of rhodamine B-contained wastewater were as follows: 1.5′10-2mol/L of H2O2, 0.13g/L of Fc and initial pH range was 2~6. To substitute Fc for Fe2+ catalyst of photo-assisted heterogeneous Fenton reaction was proved to be feasible.