Iron (III) hydroxocomplex-methyl viologen dication system as a prospective tool for determination of hydroxyl radical reaction rate constants with environmental pollutants

Yuliya E. Tyutereva, Vyacheslav P. Grivin, Jing Xu, Feng Wu, Victor F. Plyusnin, Ivan P. Pozdnyakov

Research output: Contribution to journalArticlepeer-review

Abstract

Reactivity of oxidative species with target pollutants is one of the crucial parameters for application of any system based on advanced oxidation processes (AOPs). This work presents new useful approach how to determine the hydroxyl radical reaction rate constants (kOH) using UVA laser flash photolysis technique. Fe (III) hydroxocomplex at pH 3 was applied as a standard source of hydroxyl radicals and methyl viologen dication (MV2+) was used as selective probe for OH radical. Application of MV2+ allows to determine kOH values even for compounds which do not generate themselves optically detectable transient species in reaction with hydroxyl radicals. Validity of this approach was tested on a wide range of different persistent pesticides and its main advantages and drawbacks in comparison with existing steady-state and time-resolved techniques were discussed.

Original languageEnglish
JournalEnvironmental Science and Pollution Research
DOIs
Publication statusPublished - 29 Oct 2021

Keywords

  • AOPs
  • Hydroxyl radical
  • Iron hydroxocomplex
  • Laser flash photolysis
  • Methyl viologen dication
  • Reaction rate constants

OECD FOS+WOS

  • 1.05 EARTH AND RELATED ENVIRONMENTAL SCIENCES
  • 1.06 BIOLOGICAL SCIENCES
  • 1.05.JA ENVIRONMENTAL SCIENCES

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