以磁性碳纳米管（Fe₃O₄/MWCNTs-COOH）为基质，壳聚糖（CS）、甲基丙烯酸甲酯（MMA）为功能单体，戊二醛为交联剂，Pb²⁺为模板，采用反相悬浮聚合法制得一种新型铅离子印迹材料（ⅡPs）。利用FT-IR、XRD、TG、SEM对其进行结构表征，通过UV-Vis和AAS研究了ⅡPs的吸附特性。结果表明，ⅡPs对Pb²⁺平衡吸附量为33.60 mg/g，该吸附过程符合准二级动力学模型，在竞争离子Cu²⁺和Cd²⁺存在时，Pb²⁺/Cu²⁺和Pb²⁺/Cd²⁺的选择系数分别为7.62和6.04。

A novel kind of lead ion-imprinted polymers (ⅡPs),based on magnetic carbon nanotubes (Fe₃O₄/MWCNTs-COOH),is prepared by reverse suspension polymerization with using chitosan (CS),methyl methacrylate (MMA) as monomers,glutaraldehyde as crosslinking agent and Pb²⁺ as template.ⅡPs are characterized by Fourier transform infrared spectrometer (FT-IR),X-ray diffraction (XRD),thermogravimetric Analysis (TG),and scanning Electron Microscope (SEM).Adsorption characteristics of ⅡPs are evaluated by ultraviolet spectrophotometer (UV-Vis) and atomic absorption spectrophotometer (AAS).Results indicate that the equilibrium adsorption capacity of ⅡPs to Pb²⁺ is 33.60 mg·g^-1.The adsorption process conforms to a pseudo-second-order kinetic model.In the presence of competitive ions including Cu²⁺ and Cd²⁺,the selection coefficients of Pb²⁺/Cu²⁺ and Pb²⁺/Cd²⁺ are 7.62 and 6.04,respectively.

江悦(1995-),女,硕士研究生,研究方向为功能新材料,yueyue195@163.com