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Received August 12, 2016
Accepted December 21, 2016
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Isotherm, kinetic and thermodynamic studies for Th(IV) sorption by amino group-functionalized titanosilicate from aqueous solutions

Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P. O. Box 14893-836, Tehran, Iran 1School of Chemical Engineering, College of Engineering, University of Tehran, P. O. Box 11365-4563, Tehran, Iran
m.karimi407@alumni.ut.ac.ir, mohammadkarimi407@gmail.com
Korean Journal of Chemical Engineering, April 2017, 34(4), 1159-1169(11)
https://doi.org/10.1007/s11814-016-0357-2
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Abstract

The 3-aminopropyltriethoxysilane-modified titanosilicate was prepared as an alternative for developing efficient adsorbents of heavy metals. The obtained material was characterized by X-ray diffraction analysis, infrared spectroscopy, textural analysis, and scanning electron microscopy. Adsorption of thorium from aqueous solutions was investigated by adsorption isotherms, kinetic and thermodynamic studies. The isothermal data were found to be correlated with the Langmuir model. The maximum sorption capacity of Th(IV) was 83.4mg g-1. The experimental data show that the external diffusion and intra-particular diffusion are significant in the sorption of thorium. The thermodynamic parameters indicated that the sorption process was physisorption, endothermic and spontaneous.

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