Removal of Toxic/Heavy Metal Ions Using Ion-Imprinted Aminofunctionalized Silica Gel

被引：18

作者：

Dey, R. K. ^{[1
]}

Jha, Usha ^{[1
]}

Patnaik, Tanushree ^{[1
]}

Singh, A. C. ^{[1
]}

Singh, Varun K. ^{[1
]}

机构：

[1] Birla Inst Technol, Dept Appl Chem, Ranchi 835215, Bihar, India

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2009年 / 44卷 / 08期

关键词：

Adsorption isotherm; aminofunctionalized silica gel; solid-phase extraction (SPE); surface imprinting technique; SOLID-PHASE EXTRACTION; SELECTIVE PRECONCENTRATION; AQUEOUS-SOLUTIONS; WATER SAMPLES; SURFACE; ADSORPTION; SEPARATION; SORBENT; POLYMER; SORPTION;

D O I：

10.1080/01496390902880115

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The investigation reports the preparation and evaluation of Cr(III) and Fe(III)-imprinted amino-functionalized silica gel adsorbents (APTS-Cr(III)-Si and APTS-Fe(III)-Si) for selective solid- phase extraction of Cr(III) and Fe(III), respectively, from aqueous solutions. The adsorbent materials were prepared by a surface imprinting technique using 3-aminopropyltrimethoxysilane as the surface modifying ligand. The effects of solution pH, sorption time, temperature, and initial metal ion concentration upon adsorption characteristics were investigated. The adsorption isotherms for Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) were evaluated and the thermodynamics of the adsorption processes were correlated. By optimizing the parameters, the synthesized materials could be used successfully for selective removal of trivalent cations from a mixture of cations in dilute aqueous solution.

引用

页码：1829 / 1850

页数：22

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