为改善MnFe2O4纳米颗粒在实际应用中的团聚问题，结合多壁碳纳米管(CNT)原位负载，提出超重力法制备CNT负载MnFe2O4纳米材料(MnFe2O4/CNT)。以典型的重金属污染Pb(II)作为研究对象，对其吸附性能进行研究。首先考察了MnFe2O4负载量对Pb(II)吸附容量的影响，确定最佳MnFe2O4负载量为83.3wt%。采用XRD, SEM, N2吸附-脱附比表面分析仪和VSM对最佳MnFe2O4负载量条件下的MnFe2O4/CNT进行表征。MnFe2O4/CNT展现出优异的磁性，其饱和磁化强度为35.85 emu/g，因而可应用于水体中污染物的磁性分离。吸附实验结果表明在初始Pb(II)浓度300 mg/L和溶液pH=6的条件下，Pb(II)在MnFe2O4/CNT上180 min达到吸附平衡，吸附平衡容量为80.7 mg/g，远高于单独的CNT (28.4 mg/g)。动力学研究表明Pb(II)在MnFe2O4/CNT上的吸附符合Elvoch动力学模型，说明吸附机理中存在化学吸附。Freundlich等温线模型能够很好地描述Pb(II)在MnFe2O4/CNT上的吸附过程，其代表发生在非均匀表面的多分子层吸附。另外，吸附等温线实验中获得的MnFe2O4/CNT最大吸附容量为106.2 mg/g，展现出了对重金属Pb(II)优异的吸附性能，在去除溶液中重金属中具有较大的应用潜力。根据X射线光电子能谱分析，表明吸附机理涉及到Pb(II)与MnFe2O4表面羟基的络合。

In order to overcome the agglomeration problem of MnFe2O4 nanoparticles in practical applications, the high-gravity technology combining with the in?situ support of multiwalled carbon nanotubes (CNT) is proposed to prepare the CNT supported MnFe2O4 nano-material (MnFe2O4/CNT). The typical heavy metal pollution Pb(II) is selected as the research object to study the adsorption performance of MnFe2O4/CNT. First, the effects of different MnFe2O4 loads on the adsorption capacity toward Pb(II) are investigated, and the optimal MnFe2O4 load is determined to be 83.3wt%. The obtained MnFe2O4/CNT in the optimal MnFe2O4 load is charactered by XRD, SEM, N2 adsorption-desorption specific surface analyzer and VSM, and which exhibits an excellent magnetic property with a high saturation magnetization of 35.85 emu/g. Thus, the obtained MnFe2O4/CNT can be applied for the magnetic separation of pollutants in water. The results of adsorption experiments show that under the conditions of initial Pb(II) 300 mg/L and solution pH=6, the adsorption of Pb(II) on MnFe2O4/CNT in solution reached equilibrium after 180 min, and the adsorption equilibrium capacity is 80.7 mg/g, which is much higher than pure CNT (28.4 mg/g). The kinetic study demonstrates that the adsorption behavior of Pb(II) on MnFe2O4/CNT is most consistent with the Elvoch kinetic model,which suggests there exists a chemical adsorption in the adsorption mechanisms. Freundlich isotherm model describes well the adsorption process of Pb(II) on MnFe2O4/CNT, which represents a multilayer adsorption process on heterogeneous surfaces. In addition, the maximum adsorption capacity of MnFe2O4/CNT obtained from adsorption isotherm experiment is 106.2 mg/g, which displays excellent adsorption performance for Pb(II) and has a great potential in heavy metals removal in solution. According to the X-ray photoelectron spectroscopy analysis, it can be concluded that the adsorption mechanisms involve the complexation between Pb(II) and the hydroxyl groups on the surface of MnFe2O4.