Effect of calcination temperature on Mg-Al bimetallic oxides as sorbents for the removal of F- in aqueous solutions

Sayo Moriyama, Keiko Sasaki, Tsuyoshi Hirajima

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27 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)597-603
Number of pages7
JournalChemosphere
Volume95
DOIs
Publication statusPublished - Jan 2014

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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