Uptake of Sc3+ and La3+ from aqueous solution using ethylenediaminetetraacetate-intercalated Cu-Al layered double hydroxide reconstructed from Cu-Al oxide

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Abstract

A Cu-Al layered double hydroxide intercalated with ethylenediaminetetraacetate (edta·Cu-Al LDH) was prepared by suspending Cu-Al oxide, obtained by the calcination of CO32 - intercalated Cu-Al LDH, in edta solution. It was found that the reconstruction of Cu-Al oxide to Cu-Al LDH was promoted with an increase in the temperature and time. The reaction in the pH range of around 8 suggests that Hedta3- was intercalated in the interlayer of Cu-Al LDH. Edta·Cu-Al LDH was found to take up rare metal ions such as Sc3+ and La3+ in an aqueous solution at a pH of around 6-6.5. The uptake of Sc3+ was caused not only by the chelating function of Hedta3- in the interlayer but also by the chemical behavior of Cu-Al LDH itself. On the other hand, the uptake of La 3+ was caused only by the chelating function of Hedta3- in the interlayer. The Hedta3- in the interlayer of edta·Cu-Al LDH had the potential to form a chelate complex more preferentially with Sc 3+ than with La3+.

Original languageEnglish
Pages (from-to)366-371
Number of pages6
JournalSolid State Sciences
Volume13
Issue number2
DOIs
Publication statusPublished - 2011 Feb

Keywords

  • Cu-Al layered double hydroxide
  • Cu-Al oxide
  • Ethylenediaminetetraacetate
  • Rare metal
  • Reconstruction
  • Uptake

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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