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 language | English |
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Pages (from-to) | 366-371 |
Number of pages | 6 |
Journal | Solid State Sciences |
Volume | 13 |
Issue number | 2 |
DOIs | |
Publication status | Published - 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