期刊
MICROCHIMICA ACTA
卷 172, 期 3-4, 页码 309-317出版社
SPRINGER WIEN
DOI: 10.1007/s00604-010-0491-1
关键词
SBA-15; Surface ion-imprinted; Pb(II); Selective separation
资金
- National Science Foundation of China [20877036]
- Science and Technology Ministry of China [05C26213100474]
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 pseudosecond-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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