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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 diffractometer, 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.
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, 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 equations fitted the adsorption isotherm data. The results of selectivity experiment showed that dependent adsorbed rate of Pb (II) on Pb (II) -imprinted polymer was also higher than all other studied ions. Desorption conditions of the adsorbed Pb (II) from the Pb (II) -imprinted polymer were also studied in batch experime nts. The prepared Pb (II) -imprinted polymer was shown to promising for the separation and enrichment of trace Pb (II) from water samples. The adsorption and desorption mechanisms were proposed.