Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 316, Issue 1, Pages 369-382Publisher
SPRINGER
DOI: 10.1007/s10967-018-5720-9
Keywords
Uranium(VI); Magnetic nanocomposite; Surface-initiated RAFT polymerization; Adsorption
Funding
- National Natural Science Foundation of China [U1401231, 51704170, 11405081]
- Development Program for Science and Technology for National Defense [B3720132001]
- China Postdoctoral Science Foundation [2017M612569]
- Research Foundation of Education Bureau of Hunan Province [16C1386]
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In this work, the nanoparticles possessing a macro-initiator (MNPs@SCSOEt) were firstly obtained by surface-initiated RAFT polymerization. The structure of the nanocomposite was characterized by FT-IR, SEM, TEM, TGA, XPS and VSM. The effects of pH, contact time, initial uranium concentrations, coexisting ions and temperature on the U(VI) adsorption by MNPs@PAO were investigated in detail. The adsorption process was found to be in good agreement with pseudo-second order kinetic model and Langmuir adsorption isotherm model. The maximum adsorption capacity was estimated to be 216.45 mg/g by fitting Langmuir model with the equilibrium data. The adsorption process was endothermic and spontaneous. In addition, the adsorption capacity of MNPs@PAO for U(VI) decreased slightly after five successive adsorption/desorption cycles.
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