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Reference type: Journal
Authors: Fan HT, Sun T
Article Title: Selective removal of iron from aqueous solution using ion imprinted thiocyanato-functionalized silica gel sorbents.
Publication date: 2012
Journal: Korean Journal of Chemical Engineering
Volume: 29
Issue: (6)
Page numbers: 798-803.
DOI: 10.1007/s11814-011-0234-y

Abstract: We combined surface imprinting technique with sol-gel process for preparing a new iron(III)-imprinted thiocyanato-functionalized silica gel sorbent using 3-thiocyanatopropyltriethoxysilane 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 thiocyanato-functionalized silica gel was characterized by FT-IR spectra, SEM, and the static adsorptiondesorption method. Maximum binding capacity, optimum pH, and equilibrium binding time were found to be 20.31 mg g-1 , pH 4.2, and 20min, respectively. The relative selectivity coefficients of Fe(III)-imprinted thiocyanato-functionalized silica gel sorbents for Fe(III)/Ni(II), Fe(III)/Co(II), Fe(III)/Cd(II) and Fe(III)/Pb(II) were 11.8, 10.6, 8.2 and 9.1 times greater than the non-imprinted silica gel, respectively. The iron(III)-imprinted thiocyanato-functionalized silica gel sorbents could be used repeatedly without decreasing in their adsorption capacities significantly
Template and target information: iron ion, ferric ion, Fe(III)
Author keywords: Iron, sol-gel, 3-Thiocyanatopropyltriethoxysilane, ion imprinted polymer

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