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Abstract: Pb2+ -imprinted polymer particles were prepared by surface molecular imprinting technique and sol-gel process with Pb2+ ion as the template, chitosan as the functional monomer, silica gel as the carrier, and KH-560 as the cross-linking a+¼ent. Both the imprinted and non-imprinted polymer particles were characterized by FT-IR, UV-spectra, and seanning electron microscopy. The effect of adsorption acidity, sorbent dosage and resting time on adsorption r+óte was investigated by inductively coupled plasma atomic emission spectrome-try. Selectivity for Pb2+ ions of the prepared polymer was also studied in mixed aqueous solution. Adsorption capacity of Pb2+ -imprinted polymer was compared with that of non-imprinted polymer. Finally, imprint and adsorption mechanism was also put fonvard. The optimum acidity for quantitative enrichment was around pH 4. 5 and the adsorption equilibrium could be reached in five hours. Pb2+ -imprinted polymer exhibited high selectivity for Pb2+ ions, and its adsorption capacity was two times higher than that of non-imprinted polymer
Template and target information: Pb2+, lead ion
Author keywords: Inductively coupled plasma atomic emission spectrometry, Lead ( II ) -imprinted polymer, sol-gel process, Surface molecular imprinting technique