Preparation of Fe3O4@MgO Nanocomposites and Their Adsorption Properties for Pb2+
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摘要: 采用两步化学沉淀法制备了Fe3O4@MgO纳米复合材料,研究了纳米复合材料对Pb2+的吸附性能。结果表明,所制备的复合材料具有较高的顺磁性和稳定性,其饱和磁化强度为58.07 emu/g,初始氧化增重温度为125℃,对Pb2+有较好的吸附能力,在50 min内可以达到吸附平衡,最大吸附量为711.5 mg/g,其吸附过程符合准二级动力学模型和Langmuir等温吸附模型。Abstract: Fe3O4@MgO nanocomposites were prepared by two-step chemical precipitation method. The adsorption properties of nanocomposites for Pb2+ were investigated. The results show that the prepared composites have super paramagnetism and high stability, and the saturation magnetization and the initial temperature of oxidation are 58.07emu/g and 125 ℃, respectively. The as-obtained composites have excellent adsorption performance for Pb2+ with the maximum adsorption capacity of 711.5 mg/g, and the adsorption equilibrium can be reached within 50 min. The adsorption process well followed the pseudo-second-order kinetic model and Langmuir isotherm model.
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Keywords:
- Fe3O4@MgO /
- nanocomposites /
- magnetic materials /
- adsorption properties
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