Magnetic Th(IV)-ion imprinted polymers with salophen schiff base for separation and recognition of Th(IV)

作者：He, F. F.; Wang, H. Q.^*; Wang, Y. Y.; Wang, X. F.; Zhang, H. S.; Li, H. L.; Tang, J. H.

来源：Journal of Radioanalytical and Nuclear Chemistry, 2013, 295(1): 167-177.

DOI：10.1007/s10967-012-1891-y

• Magnetic absorbent
• Thorium ion
• Imprinted polymers
• Schiff base
• Separation

A new complex of N,N'-bis(3-allyl salicylidene)o-phenylenediamine and thorium(IV) (Th(IV)) was synthesized and used as the functional monomer for a novel Th(IV) magnetic ion-imprinted polymer; this polymer was synthesized using a surface imprinting technique that included the modified magnetic Fe3O4 particle and used tetraethyl orthosilicate, 3-Aminopropyltriethoxysilane and maleic anhydride in the process. The magnetic polymer was characterized using FT-IR, and powder- and single crystal-XRD. The behavior of Th(IV) was investigated using batch experiments. At pH 4.5, the uptake capacity of this adsorbent and that of the non-imprinted polymer was 42.54 and 14.10 mg g(-1), respectively, and the relative selectivity coefficient values of the synthesized adsorbent for Th(IV)/La(III), Th(IV)/Ce(III), Th(IV)/Nd(III), and Th(IV)/U(VI) were 82.2, 93.1, 21.0 and 62.4 times greater than that of the non-imprinted matrix, respectively. In addition, the Th(IV) adsorption process using Fe3O4@SiO2-IIP follows pseudo-second-order reaction kinetics and the Langmuir adsorption isotherm. The thermodynamic parameters also suggest that the adsorption of Th(IV) onto Fe3O4@SiO2-IIPs was a spontaneous and endothermic process.

• 出版日期2013-1
• 单位南华大学