Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 310, Issue 1, Pages 125-137Publisher
SPRINGER
DOI: 10.1007/s10967-016-4779-4
Keywords
Mesoporous silica; Uranium(VI); Adsorption; Dihydroxy benzaldehyde; Post-grafting
Funding
- National Natural Science Foundation of China [21101082, J1210001]
- Fundamental Research Funds for the Central University [Lzujbky-2013-55]
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Three different modified SBA-15 have been synthesized by a post-grafting method using 3,4-dihydroxy benzaldehyde (OHBA), 2,4-dihydroxy benzaldehyde (MHBA), 2,4-dihydroxy acetophenone (RATP). These materials were characterized by NMR, TEM, FT-IR and elemental analysis. Batch experiments have been conducted to study the effects of pH, temperature, adsorbent dosage, ionic strength, shaking time, initial concentration of metal ion, and coexisting ions on uranium(VI) sorption behaviors of pure and functional SBA-15. In addition, the adsorption of U(VI) could be well-described by the Langmuir, Freundlich isotherms and pseudo-second kinetic models. The results suggest the sorption capacity and selectivity of SBA-15 were improved after functionalization.
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