Fe_3O_4-H_2O_2类Fenton法降解亚甲基蓝

Degradation of methylene blue by Fe_3O_4-H_2O_2 composition Fenton-like system

以Fe Cl_3·6H_2O和Fe SO_4·7H_2O为原料,氢氧化钠溶液为沉淀剂,制备了磁性Fe_3O_4粒子。采用XRD、SEM方法表征,并研究了Fe_3O_4粒子对亚甲基蓝的降解作用。结果表明,Fe_3O_4粒子平均粒径为5μm,以Fe_3O_4-H_2O_2组成类Fenton反应体系降解10 mg/L的亚甲基蓝溶液,当溶液p H值为3,浓度3%的H_2O_2用量为4 m L和0.2 g Fe_3O_4粉末,9 h内亚甲基蓝的降解率可达98.69%。

Fe_3O_4magnetic powder was prepared by co-precipitation method with Fe Cl_3·6H_2O and Fe SO_4·7H_2O. Sodium hydroxide solution was the precipitator. The Fe_3O_4 particles were characterized by X-ray diffraction（ XRD） and scanning electron microscopy（ SEM）,meanwhile Fe_3O_4 magnetic particles was used to degrade methylene blue（ MB）. Results showed that the average size of Fe_3O_4 particles is about5 μm. In Fe_3O_4-H_2O_2 composition Fenton-like system,10 mg/L methylene blue solution was degraded on the condition of p H value is 3,3% H_2O_2 dosage is 4 m L and 0. 2 g Fe_3O_4 powder,degradation efficiency of methylene blue reached 98. 69% in 9 h.