Authors:
Qian Lijuan Lanzhou University Radiochemistry Laboratory, School of Nuclear Science and Technology Lanzhou 73000 People’s Republic of China

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Zhao Jianing Lanzhou University Radiochemistry Laboratory, School of Nuclear Science and Technology Lanzhou 73000 People’s Republic of China

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Hu Peizhuo Lanzhou University Radiochemistry Laboratory, School of Nuclear Science and Technology Lanzhou 73000 People’s Republic of China

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Geng Yanxia Lanzhou University Radiochemistry Laboratory, School of Nuclear Science and Technology Lanzhou 73000 People’s Republic of China

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Wu Wangsuo Lanzhou University Radiochemistry Laboratory, School of Nuclear Science and Technology Lanzhou 73000 People’s Republic of China

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Abstract  

Sorption of Th(IV) on Zr2O(PO4)2 as a function of contact time, reaction temperature, pH, ionic strength and solid-to-liquid ratio (m/V) is studied under ambient condition by using batch technique. Effects of fulvic acid (FA), phosphate, sulfate and citrate on Th(IV) sorption are investigated in detail. A pseudo-second-order rate equation is used to simulate the kinetic sorption. The removal of Th(IV) increases with increasing pH and hardly depends on ionic strength. Sorption of Th(IV) increases with increasing m/V and reaction temperature. The presence of FA and phosphate enhances the sorption of Th(IV) on Zr2O(PO4)2 while sulfate and citrate decrease the sorption. The Langmuir and Freundlich models are used to simulate the sorption isotherm of Th(IV) on Zr2O(PO4)2 at different temperatures. The thermodynamic data (i.e., ∆H0, ∆S0, ∆G0) are calculated from temperature dependent sorption isotherms. The results suggest that the sorption process of Th(IV) on Zr2O(PO4)2 is spontaneous and endothermic.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)