Highly selective ion-imprinted particles for solid-phase extraction of Pb2+ ions

被引：142

作者：

Esen, Cem ^{[2
]}

Andac, Muge ^{[1
]}

Bereli, Nilay ^{[1
]}

Say, Ridvan ^{[3
]}

Henden, Emuer ^{[2
]}

Denizli, Adil ^{[1
]}

机构：

[1] Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey

[2] Ege Univ, Dept Chem, Izmir, Turkey

[3] Anadolu Univ, Dept Chem, Eskisehir, Turkey

来源：

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2009年 / 29卷 / 08期

关键词：

Ion-imprinted particles; Selective recognition; Lead determination; Solid-phase extraction; Molecular imprinting; METAL-ION; AQUEOUS-SOLUTIONS; HUMAN PLASMA; LEAD; PRECONCENTRATION; RECOGNITION; ADSORPTION; POLYMERS; EQUILIBRIUM; TEMPLATE;

D O I：

10.1016/j.msec.2009.07.012

中图分类号：

TB3 [工程材料学]; R318.08 [生物材料学];

学科分类号：

082905 [生物质能源与材料]; 100103 [病原生物学];

摘要：

The Pb2+-imprinted (PHEMAC-Pb2+)particles were prepared by bulk polymerization as a solid-phase extraction (SPE) adsorbent. N-methacryloyl-(L)-cysteine (MAC) was used as functional monomer to have a well-shaped molecular geometry between MAC monomer and Pb2+ ions that provide molecular recognition based on well fitted cavities for Pb2+ ions after removal of template ions. The PHEMAC-Pb2+ particles were characterized and the applicability of these particles was investigated for the solid-phase extraction of Pb2+ ions from aqueous solutions and environmental samples. The PHEMAC-Pb2+ particles with a size range of 50-200 mu m have a rough surface and macropores in bulk structure. The adsorption capacity of the PHEMAC-Pb2+ particles is relatively low (2.01 mg/g). However, the high selectivity towards competitive ions (Cd2+, Ni2+ and Cu2+) promises the PHEMAC-Pb2+ particles an alternative SPE adsorbent in literature. The relative selectivity coefficients of PHEMAC-Pb2+ particles for Pb2+/Ni2+, Pb2+/Cd2+ and Pb2+/Cu2+ were almost 71, 117 and 192 times greater than that of non-imprinted (PHEMAC) particles, respectively. Moreover, the reusability of the PHEMAC-Pb2+ particles was tested for several times and no significant loss in adsorption capacity was observed. The accuracy of the proposed procedure was also verified by the determination of Pb2+ ions in the certified reference material, LGC 6137 Estuarine sediment. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2464 / 2470

页数：7

共 33 条

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