Degradation of methylene blue by Fe(0)-based Fenton process with H2O2 in dark was investigated. The effects of H2O2 dose, Fe(0) dose, initial concentration of methylene blue and initial pH value on the degradation of methylene blue were examined. The results showed that the degradation of methylene blue occurred with low dose of H2O2 and Fe(0). The removal of MB can be over 90% at pH 4.5 with 2.0 g·L-1 Fe(0) and 3.0 mmolL-1 H2O2. The degradation rate of MB by Fe(0)-based Fenton process with H2O2 increased with the increasing of Fe(0) dose and H2O2 dose, but decreased with the increasing of initial concentration of MB. The optimum pH value for the degradation of MB by Fe(0)/H2O2 is near neutral. The change of UV-vis spectra of MB during reaction suggested some small molecular intermediates produced during reaction.%进行了Fe(0)和H2O2协同催化降解亚甲基蓝的研究,分析了Fe(0)投加量、H2O2投加量、溶液初始pH值和染料初始质量浓度等因素的影响.研究表明:Fe(0)和H2O2协同可有效催化降解亚甲基蓝；在pH为4.5,Fe(0)用量为2.0 g·L-1,H2O2用量为3.0 mmol·L-1时对10 mg·L-1亚甲基蓝的去除率在60 min内达到90％以上.MB的降解去除率随着Fe(0)投加量与H2O2用量的增加而增加,但随着其初始质量浓度的增大而降低.研究结果还表明,Fe(0)和H2O2可在接近中性条件下有效协同催化降解亚甲基蓝.UV-Vis光谱在反应过程的变化说明亚甲基蓝降解生成了一些小分子物质.
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