Abstract
ABSTRACT A heterogeneous Fenton process catalyzed by ferrocene (Fc) was established to investigate the degradation of methylene blue (MB). Fc was proved to be of good cyclic redox capacity and catalytic potential. Heterogeneous Fenton process catalyzed by Fc particles was predominate process in Fc/H2O2 system. The active radical generated in the Fc/Fenton process was hydroxyl radical ( ) from the decomposition of H2O2 catalyzed by Fc. Excess H+ and OH− in solution resisted the decomposition of H2O2 and the generation of . Parameters including the initial solution pH value, dosage of catalyst, and H2O2 influenced the efficiency of Fc/Fenton process. Maximum efficiencies of 100% MB removal and 64% chemical oxygen demand (COD) removal can be obtained with 0.372 g/L Fc and an initial [Fc]/[H2O2] = 0.5077 at pH 3, 30°C, after 120 min of reaction. With determined Fc or H2O2 dosage, Fc/Fenton efficiency increased as the ratio [Fc]/[H2O2] increased. The efficiency of MB removal was much higher than COD removal in...
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