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Synthesis, characterization, and adsorption performance of Pb(II)-imprinted polymer in nano-TiO2 matrix
Synthesis, characterization, and adsorption performance of Pb(Ⅱ)-imprinted polymer in nano-TiO2 matrix

Keywords: ion-imprinted,sol-gel,adsorption,selective
分子印迹聚合物
,铅(Ⅱ),吸附性能,二氧化钛基,合成,Langmuir,扫描电子显微镜,选择性分离

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Abstract:

Surface ion-imprinted in combination with sol-gel process was applied to synthesis a new Pb(II)-imprinted polymer for selective separation and enrichment of trace Pb(II) from aqueous solution. The prepared material was characterized by using the infrared spectra, X-ray di ractometer, and scanning electron microscopy. The batch experiments were conducted to study the optimal adsorption condition of adsorption trace Pb(II) from aqueous solutions on Pb(II)-imprinted polymer. The equilibrium was achieved in approximately 4.0 h, and the experimental kinetic data were fitted the pseudo second-order model better. The maximum adsorption capacity was 22.7 mg/g, and the Langmuir equation fitted the adsorption isotherm data. The results of selectivity experiment showed that selectively adsorbed rate of Pb(II) on Pb(II)-imprinted polymer was higher than all other studied ions. Desorption conditions of the adsorbed Pb(II) from the Pb(II)-imprinted polymer were also studied in batch experiments. The prepared Pb(II)-imprinted polymer was shown to be promising for the separation and enrichment of trace Pb(II) from water samples. The adsorption and desorption mechanisms were proposed.

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