摘要
运用化学沉淀法合成了CuFe_2O_4/改性活性炭(MAC)磁性纳米复合材料,并研究其对罗丹明B(Rh B)的吸附性能。运用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)、振动样品磁强计(VSM)和比表面积测定仪等技术对其理化性质进行了表征,分析表明复合材料颗粒大小在10~100 nm之间;探讨了Cu Fe_2O_4/MAC磁性复合材料吸附Rh B的过程,考察了溶液的p H值、Rh B的初始质量浓度、温度等因素对吸附的影响。结果表明:CuFe_2O_4/MAC磁性复合材料可有效吸附去除Rh B,其吸附过程适合准二级动力学模型及吸附等温线符合Freundlich模型,饱和吸附容量为73. 54 mg/g。CuFe_2O_4/MAC磁性复合材料具有较好吸附性能和磁响应性,易于分离回收,可作为一种有效去除水体污染物的吸附材料。
The magnetic composite CuFe_2O_4/modified activated carbon( MAC) was synthesized by chemical precipitation,and its adsorption properties of Rh B were studied. The physicochemical property of CuFe_2O_4/MAC was characterized by scanning electron microscopy( SEM),X-ray diffraction( XRD),fourier transform infrared( FT-IR),vibrating sample magnetometer( VSM) and Brunauer-Emmett-Teller surface area measurement( BET) methods. The particle size of composite was between10 nm to 100 nm. The adsorption process of Rh B was studied by magnetic composite CuFe_2O_4/MAC. The effect of solution p H,initial concentration of Rh B and temperature on the adsorption was investigated. The results show that Rh B could be effectively adsorbed by magnetic composite CuFe_2O_4/MAC. The adsorption process was well fitted with the Langmuir models with the adsorption maximum capacity of Rh B 73. 54 mg/g. The adsorption process of magnetic composite CuFe_2O_4/MAC for Rh B was conformed to the Pseudo-second-order kinetics model. Therefore,the magnetic composite CuFe_2O_4/MAC has good adsorption and magnetism and is easy to separate,which can be used as an adsorption material to effectively remove water pollutants.
引文
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