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Terbium Ion Adsorption From Aqueous Solution by Using Magnetic γFe

Terbium Ion Adsorption From Aqueous Solution by Using Magnetic γFe

Tina Kegl, Aljoša Košak, Aleksandra Lobnik, Irena Ban

Materials (Basel). 2019 Apr 19;12(8):1294.

PMID: 31010217

Abstract:

New magnetic stabilized and functionalized core@shell nanoparticles (NPs) were synthesized in a simple way and characterized in order to adsorb Tb3+ from aqueous solution with a very low Tb3+ concentration. For the fluorescence determination of adsorption efficiency and capacity, tiron monohydrate as a ligand was used. The obtained results confirm the potential of the synthesized magnetic γ-Fe2O3-NH4OH@SiO2 NPs, functionalized with (3-Aminopropyl) trimethoxysilane (APTMS), to be used for adsorption of Tb3+ from aqueous solution, with the possibility of its removal from aqueous solution via an external magnet. The endothermic and spontaneous adsorption follows a pseudo-second-order kinetic model, and the adsorption equilibrium data fit the Temkin isotherm well. The maximum adsorption efficiency from aqueous solution with a 2 × 10-6 M concentration of Tb3+ is over 90% at pH 7.

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