Selective Removal of Iron from Aqueous Solution using Ion Imprinted Cyanato-Functionalized Silica Gel Sorbents

被引:19
作者
Fan, Hong-Tao [1 ,2 ]
Sun, Ting [1 ]
机构
[1] Shenyang Univ Chem Technol, Coll Appl Chem, Shenyang 110004, Peoples R China
[2] Northeastern Univ, Coll Sci, Shenyang, Peoples R China
基金
中国国家自然科学基金;
关键词
(3-Cyanatopropyl)triethoxysilane; ion imprinted polymer; iron; sol-gel; SOLID-PHASE EXTRACTION; SURFACE; METAL; POLYMERS; WATER; ADSORPTION; SEPARATION; IRON(III);
D O I
10.1080/01496395.2011.608204
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We combined a surface imprinting technique with sol-gel process for preparing a new iron(III)-imprinted cyanato-functionalized silica gel sorbents using (3-cyanatopropyl)triethoxysilane as the functional monomer, and epichlorohydrin as the cross-linking agent for the selective removal of iron(III) from aqueous solution. The iron(III)-imprinted cyanato-functionalized silica gel was characterized by FT-IR spectra and the static adsorption-desorption method. Maximum binding capacity, optimum pH, and equilibrium binding time were found to be 35.6 mg.g(-1), pH 3, and 20 min, respectively. The relative selectivity coefficients of ion imprinted cyanato-functionalized silica gel sorbents for Fe(III)/Ni(II), Fe(III)/Co(II), Fe(III)/Cd(II), and Fe(III)/Pb(II) were 8.56, 11.95, 16.96, and 50.71 times greater than the non-imprinted silica gel, respectively. The iron(III)-imprinted cyanato-functionalized silica gel sorbents could be used repeatedly without significantly decreasing their adsorption capacities.
引用
收藏
页码:507 / 512
页数:6
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