Oscillatory concentration pulses of some divalent metal ions induced by a redox oscillator

Viktor Horváth, Krisztina Kurin-Csörgei, Irving R. Epstein, Miklós Orbán

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Oscillations in the concentration of divalent ions Cd2+, Ca 2+, Zn2+, Co2+ and Ni2+ are induced by adding these species to the BrO3--SO3 2- chemical oscillator in a flow reactor. Producing periodic pulses in the concentrations of these non-redox ions extends our earlier approach to generating forced periodic behavior. Instead of driving pH-dependent equilibrium reactions of the target ion by a pH oscillator backward and forward, we now couple a redox core oscillating reaction to two consecutive reactions taking place between the components of the oscillator and the target element. In the systems examined here, the oscillatory reductant SO32- binds the free metal ion in a MSO3 precipitate, reducing its level to a minimal value when [SO32-] is high, followed by release of the metal ion when the sulfite is oxidized by BrO3-.

Original languageEnglish
Pages (from-to)1248-1252
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume12
Issue number6
DOIs
Publication statusPublished - Feb 14 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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