TY - JOUR
T1 - Effect of calcination temperature on Mg-Al bimetallic oxides as sorbents for the removal of F- in aqueous solutions
AU - Moriyama, Sayo
AU - Sasaki, Keiko
AU - Hirajima, Tsuyoshi
N1 - Funding Information:
Financial support was provided to K.S. by the Japan Society for the Promotion of Science, Next-Generation World Leading Researchers Program ( GR078 ).
PY - 2014/1
Y1 - 2014/1
N2 - Bimetallic oxides were synthesized from hydrotalcite using increasing calcination temperatures (873, 1073, 1273K). These bimetallic oxides were fully characterized and the sorption density of F- was investigated. X-ray diffraction patterns for the produced bimetallic oxides showed that MgO was the primary phase within the range of investigated calcination temperatures, but MgO crystallinity increased with calcination temperature and an additional MgAl2O4 phase was formed. In the process of F- sorption, the bimetallic oxides were primarily transformed into hydrotalcite with intercalation of F-.The Higher calcination temperature increased the MgAl2O4 phase, which did not contribute to the immobilization of F-. These findings show that optimizing the calcination temperature can be used to maximize the sorption density of this material for F- removal.
AB - Bimetallic oxides were synthesized from hydrotalcite using increasing calcination temperatures (873, 1073, 1273K). These bimetallic oxides were fully characterized and the sorption density of F- was investigated. X-ray diffraction patterns for the produced bimetallic oxides showed that MgO was the primary phase within the range of investigated calcination temperatures, but MgO crystallinity increased with calcination temperature and an additional MgAl2O4 phase was formed. In the process of F- sorption, the bimetallic oxides were primarily transformed into hydrotalcite with intercalation of F-.The Higher calcination temperature increased the MgAl2O4 phase, which did not contribute to the immobilization of F-. These findings show that optimizing the calcination temperature can be used to maximize the sorption density of this material for F- removal.
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U2 - 10.1016/j.chemosphere.2013.10.018
DO - 10.1016/j.chemosphere.2013.10.018
M3 - Article
C2 - 24183624
AN - SCOPUS:84887607004
SN - 0045-6535
VL - 95
SP - 597
EP - 603
JO - Chemosphere
JF - Chemosphere
ER -