Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 330, Issue 1, Pages 225-235Publisher
SPRINGER
DOI: 10.1007/s10967-021-07952-0
Keywords
Polyphosphazene; Sulfonic acid-functionalized; Carbon materials; Uranium; Adsorption
Funding
- National Natural Science Foundation of China [2216060121, 21966005]
- Natural Science Foundation of Jiangxi Province [20202BABL203001, 20192BAB202007, 20192ACB21001]
- Opening fund project of State Key Laboratory of Nuclear Resources and Environment, East China University of Technology [NRE1926]
- Key Project of Science and Technology Project of Jiangxi Provincial Department of Education [GJJ200701]
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The carbonization and functionalization of CS-SO3H by PZS showed good adsorption performance for uranyl ions, with results indicating that the adsorption process followed the Langmuir isotherm and pseudo-second-order model. The maximum adsorption capacity was approximately 341.98 mg/g, and the thermodynamic parameters demonstrated that the adsorption of uranium was spontaneous and endothermic.
In this study, sulfonic acid-functionalized carbon materials (CS-SO3H) was carbonized and functionalized by polyphosphazene (PZS). The morphology and structure were characterized by FTIR, XPS and SEM. The influences of pH, contact time, initial concentration and temperature of CS-SO3H for uranyl ions were investigated. Results indicated that the adsorption equilibrium time was about 20 min. The adsorption process was more consistent with the Langmuir isotherm and the pseudo-second-order model. In addition, the maximum adsorption capacity of CS-SO3H was about 341.98 mg/g. Moreover, the thermodynamic parameters of Delta G, Delta H and Delta S show that the uranium adsorption process was spontaneous and endothermic.
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