Abstract
A surface-imprinted mesoporous sorbent for Pb(II) ion was synthesized by the post-synthesis method. The material was characterized by transmission electron microscopy and nitrogen adsorption-desorption isotherms. The adsorption by the material was studied by batch experiments with respect to effects of pH value, contact time, kinetics, and adsorption isotherms. Both the pseudo-second-order kinetic model and the Langmuir model fit the experimental data well. Compared to other imprints for Pb(II), to the traditional sorbents and to the non-imprinted polymer, the new sorbent displays fast kinetics and higher selectivity. Pb(II) ion can be desorbed from the imprint with 2 M hydrochloric acid with high efficiency. The sorbent was applied to the selective separation and determination of Pb(II) in water and sediment samples with satisfactory results.
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This work was supported by the National Science Foundation of China (Project No. 20877036), the Science and Technology Ministry of China (Project No. 05C26213100474).
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Liu, Y., Liu, Z., Wang, Y. et al. A surface ion-imprinted mesoporous sorbent for separation and determination of Pb(II) ion by flame atomic absorption spectrometry. Microchim Acta 172, 309–317 (2011). https://doi.org/10.1007/s00604-010-0491-1
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DOI: https://doi.org/10.1007/s00604-010-0491-1