期刊
NUCLEAR ENGINEERING AND TECHNOLOGY
卷 50, 期 7, 页码 1112-1119出版社
KOREAN NUCLEAR SOC
DOI: 10.1016/j.net.2018.06.004
关键词
Uranium (VI); Monetite; Nanoparticles; Adsorption; Adsorption isotherm
资金
- University of Guilan
- Caspian Sea Basin Research Center, University of Guilan
Dicalcium phosphate nanoparticles (DCP-NPs) was synthesized chemically and used for adsorptive removal of uranyl ions from aqueous solutions in a batch system. A commercial grade of DCP (monetite) was also employed for comparison. The synthesized and commercial adsorbents (S-DCP and C-DCP) were characterized by FT-IR, SEM and XRD techniques. The investigation of adsorption isotherms indicated that the maximum adsorption capacities (q(m)) for C-DCP and S-DCP were 714.3 and 666.7 mg g(-1) (at 293 K), respectively. The experimental kinetics were well-described by the pseudo-second-order kinetic and the equilibrium data were fitted with both Langmuir and Freundlich adsorption models. Thermodynamic studies indicated that the adsorption of uranyl ions on the monetite surface was a spontaneous exothermic process. The exhausted adsorbents could be regenerated by washing with 0.10 mol L-1 NaOH. (C) 2018 Korean Nuclear Society, Published by Elsevier Korea LLC.
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