Selectivity of heavy metal ions at acidic supramolecular surfaces

Jin Young Hyun, Gil Sun Lee, Tae Young Kim, Dong June Ahn

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Langmuir monolayers containing surface carboxylic acid head groups were examined in order to characterize their selectivity to metal ion adsorption. Experimental data of ion adsorption obtained by surface isotherms and FTIR spectroscopy were analyzed using a thermodynamic-and-electrochemical model. Among bivalent ions examined (Cr2+, Pb2+, Cu2+, Cd2+, Zn2+, Ca2+, Ni2+, and Ba2+), Langmuir monolayers showed the highest selectivity to chromium ions. In addition, it was found that adsorption constants of the surface ions are quite different from binding constants of the bulk ions. The results show important implications to sensing and separating metal ions by the use of acidic supramolecular materials.

Original languageEnglish
Pages (from-to)533-540
Number of pages8
JournalKorean Journal of Chemical Engineering
Volume14
Issue number6
DOIs
Publication statusPublished - 1997 Nov

Keywords

  • FTIR Spectroscopy
  • Interfaces
  • Langmuir Monolayers
  • Metal Ion Adsorption
  • Supramolecules

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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