Highly efficient adsorptive removal of uranyl ions from aqueous solutions using dicalcium phosphate nanoparticles as a superabsorbent
- 1. Dept. of Chemistry, Faculty of Science, University of Guilan, Rasht (Iran, Islamic Republic of)
- 2. Dept. of Chemistry, College of Science, Semnan University, Semnan (Iran, Islamic Republic of)
Description
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 (qm) 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
Additional details
Publishing Information
- Journal Title
- Nuclear Engineering and Technology
- Journal Volume
- 50
- Journal Issue
- 7
- Series
- 54 refs, 9 figs, 5 tabs
- Journal Page Range
- p. 1112-1119
- ISSN
- 1738-5733
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 49096192
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- ABSORBENTS; ADSORPTION; AQUEOUS SOLUTIONS; EFFICIENCY; KINETICS; NANOPARTICLES; REMOVAL; SURFACES; WASHING
- Descriptors DEC
- CLEANING; DISPERSIONS; HOMOGENEOUS MIXTURES; MIXTURES; PARTICLES; SOLUTIONS; SORPTION