Cr(III)-imprinted polymeric beads:: Sorption and preconcentration studies

被引:143
作者
Birlik, Ebru [1 ]
Ersoz, Arzu
Acikkalp, Erol
Denizli, Adil
Say, Ridvan
机构
[1] Eskisehir Osmangazi Univ, Fend Edebiyat Fak, Kimya Bolumu, Dept Chem, Eskisehir, Turkey
[2] Anadolu Univ, Dept Chem, Eskisehir, Turkey
[3] Hacettepe Univ, Dept Chem, Eskisehir, Turkey
[4] Anadolu Univ, BIBAM, Plant Drug & Sci Res Ctr, Eskisehir, Turkey
关键词
molecular imprinting; chromium preconcentration; separation;
D O I
10.1016/j.jhazmat.2006.06.141
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The purpose of this study is to prepare a novel molecular imprinted adsorbent to Cr(III) analysis with high selectivity. Initially, chromium (III)-methacryloylhistidine (MAH/Cr(III)) complex monomer was synthesized and then Cr(III) ion imprinted ethyleneglycoldimethacrylate-methacryloylhistidine (poly(EDMA-MAH/Cr(III))) was polymerized. Cr(III) ions were removed from the Cr(III)imprinting polymer. Selective cavity for the chromium (III) ions was obtained in the (poly(EDMA-MAH/Cr(III))) beads. These Cr(III)-imprinted beads were used in the sorption-desorption process. The effect of initial concentration of metal, the sorption rate and the pH of the medium on sorption capacity of Cr(III)-imprinting sorbents were studied. Sorption equilibrium time was achieved in about 30 min. The maximum sorption of Cr(HI) ions onto imprinted beads was about 69.28 mg/g. Sorption studies of CO(H), Ni(II), Cr(III) and Cr(VI) ions were also investigated using Cr(III)-imprinting polymers. The obtained results show that selectively adsorbed amount of Cr(III) ion on Cr(III)-imprinting polymers is higher than all other studied ions. When the beads were used repeatedly, their adsorption capacity was showed feasibility. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:110 / 116
页数:7
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