Kinetics and mechanism of the hydrolytic disproportionation of iodine

Krisztina Sebok-Nagy, T. Körtvélyesi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Kinetics of the hydrolytic disproportionation of I2 3I 2 + 3H2O ⇔ IO- 3 + 5I- + 6H+ was studied by UV-VIS spectrophotometry at 298 K and at the ionic strength 0.2 M (NaClO4) in buffered solutions in the pH range 8.91-10.50 at different initial iodide concentrations. The characterization of this reaction is fundamental for modeling oscillatory and front reactions in the presence of iodine as reactant or intermediate as well as for drinking water treatment. A matrix rank analysis confirmed three absorbing species in the beginning of the reaction, whereas later assumption of two species is enough to describe the experimental data in the visible part of the spectrum. A reaction mechanism was proposed for disproportionation by using fitting /simulation with a multipurpose program package ZiTa, by simultaneous evaluation of 17,906 points in 79 experimental curves. A parameter set was suggested, which was obtained by absolute, relative, and orthogonal fittings of the experimental data.

Original languageEnglish
Pages (from-to)596-602
Number of pages7
JournalInternational Journal of Chemical Kinetics
Volume36
Issue number11
DOIs
Publication statusPublished - Nov 2004

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Water Purification
Spectrophotometry
Iodides
Ionic strength
Iodine
Water treatment
Potable water
Drinking Water
Osmolar Concentration
iodine
Kinetics
kinetics
drinking
water treatment
spectrophotometry
iodides
evaluation
curves
matrices
simulation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Kinetics and mechanism of the hydrolytic disproportionation of iodine. / Sebok-Nagy, Krisztina; Körtvélyesi, T.

In: International Journal of Chemical Kinetics, Vol. 36, No. 11, 11.2004, p. 596-602.

Research output: Contribution to journalArticle

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