Synthesis, characterization, and application of titanate nanotubes for Th(IV) adsorption

被引：1
作者：
Jianliang Liu
Mingbiao Luo
Zizun Yuan
Aidong Ping
机构：
[1] East China Institute of Technology,State Key Laboratory Breeding Base of Nuclear Resources and Environment
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2013年 / 298卷
关键词：
Titanate nanotubes; Th(IV); Adsorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Titanate nanotubes (TNTs) have been synthesized by a hydrothermal method using rutile TiO2 powder as titanium source. The determination of the structure and morphology was characterized by XRD, FTIR, SEM and TEM. The results indicate that the TNTs successfully synthesized under hydrothermal conditions of 150 °C. The adsorption of Th(IV) on TNTs was studied as a function of contact time, pH values, ionic strength, initial Th(IV) concentration and temperature under ambient conditions by using batch technique. The results indicate that adsorption of Th(IV) on TNTs is strongly dependent on pH values, but weakly dependent on ionic strength; Adsorption kinetics was better described by the pseudo-second-order model. The adsorption isotherms are simulated by Langmuir and Freundlich models well. ΔG°, ΔH° and ΔS° free energy were calculated from experimental data, The results indicate that the adsorption of Th(IV) on TNTs is an endothermic and a spontaneous process, and increases with increasing temperature. The adsorption of Th(IV) on TNTs is mainly dominated by chemical sorption or surface complexation.
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页码：1427 / 1434
页数：7
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