Uptake of benzenecarboxylate ions by magnesium aluminium oxides

Tsugio Sato, Kenji Kato, Toshiaki Yoshioka, Akitsugu Okuwaki

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19 Citations (Scopus)


The behaviour of uptake of the benzenecarboxylate ions, C6H6‐n(COO)nn (n = 1–6), in aqueous solutions by rock‐salt type magnesium aluminium oxide, Mg(1‐x)(2+x)Al2x/(2+x)O (x = 0.17, 0.30, 0.33) was investigated at 0.70°C. All the benzenecarboxylate ions were taken up from solution competitively with OH‐ to form the hydrotalcite‐like layered double hydroxides. The uptake rate could be adequately described by a surface chemical reaction controlled shrinking core model, and the apparent activation energy was c. 60 kJ mol−1. The selectivity of anion uptake increased with increasing the charge density of the benzenecarboxylate ions. The amount of benzenecarboxylate ions incorporated in the interlayer of hydrotalcite and the selectivity of uptake for benzenecarboxylate possessing higher electric change increased with increasing aluminium content in the magnesium aluminium oxide.

Original languageEnglish
Pages (from-to)385-390
Number of pages6
JournalJournal of Chemical Technology and Biotechnology
Issue number4
Publication statusPublished - 1992


  • benzenecarboxylate ion
  • intercalation
  • layered double hydroxide
  • magnesium aluminium oxide
  • selective uptake of anion


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