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- Title
Enhancing the sorption efficiency of polystyrene by immobilizing MgO and its application for uranium (VI) removal from aqueous solutions.
- Authors
Elhefnawy, O. A.; Elabd, A. A.
- Abstract
Magnesium oxide immobilized polystyrene (PS/ MgO) was prepared by the thermal attachment method for the removal of U(VI) from aqueous solutions. PS/MgO was characterized by different techniques [scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD)]. The effects of pH, adsorbent amount, contact time, initial U(VI) concentration, temperature and co-existing cations on the removal process were investigated by using batch technique. The results showed that the maximum adsorption capacity was 163 (mg g-1) at pH 6 and 293 K. The adsorption kinetics of U(VI) onto PS/MgO followed pseudo-second order and intra-particle kinetic models. The adsorption isotherms obeyed the Freundlich isotherm model. The thermodynamic parameters show that the process is endothermic and spontaneous. PS/MgO is an attractive adsorbent for U(VI) removal from aqueous solutions due to its accessibility, low preparation cost and high removal capacity.
- Subjects
POLYSTYRENE; MAGNESIUM oxide; SORPTION; ENCAPSULATION (Catalysis); SCANNING electron microscopy; X-ray diffraction
- Publication
Radiochimica Acta, 2016, Vol 104, Issue 11, p791
- ISSN
0033-8230
- Publication type
Article
- DOI
10.1515/ract-2016-2587