Characterization of the reducing properties of anaerobic sediment slurries using redox indicators

Paul Tratnyek, N. Lee Wolfe

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The reduction of six redox indicators in anaerobic sediment slurries was studied by observing the disappearance of the color of the oxidized forms. The reaction kinetics were first-order in concentration of the oxidized form of the indicator and the reducing agents were sediment associated. The rate of indicator reduction reflects the standard potential of the indicator couple, the structure of the indicator moiety reduced and the potential and capacity of reducing agents in the sediment slurry. The relative reduction rates of the indicators suggest that anaerobic sediment systems contain concentrations of mild reducing agents that are available to react rapidly with substrates that are easily reduced. However, more refractory substrates require strong reducing agents that are gradually produced, probably as a result of microbial metabolism.

Original languageEnglish (US)
Pages (from-to)289-295
Number of pages7
JournalEnvironmental Toxicology and Chemistry
Volume9
Issue number3
StatePublished - 1990
Externally publishedYes

Fingerprint

anoxic sediment
Reducing Agents
Slurries
Oxidation-Reduction
Sediments
Substrates
Metabolism
Reaction kinetics
Refractory materials
substrate
Color
reaction kinetics
sediment
slurry
indicator
metabolism

Keywords

  • Anaerobic sediment
  • Indigo disulfonate
  • Indophenol
  • Redox indicators
  • Resorufin

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis
  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Characterization of the reducing properties of anaerobic sediment slurries using redox indicators. / Tratnyek, Paul; Wolfe, N. Lee.

In: Environmental Toxicology and Chemistry, Vol. 9, No. 3, 1990, p. 289-295.

Research output: Contribution to journalArticle

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