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 language | English (US) |
|---|---|
| Pages (from-to) | 289-295 |
| Number of pages | 7 |
| Journal | Environmental Toxicology and Chemistry |
| Volume | 9 |
| Issue number | 3 |
| State | Published - 1990 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Characterization of the reducing properties of anaerobic sediment slurries using redox indicators
AU - Tratnyek, Paul
AU - Wolfe, N. Lee
PY - 1990
Y1 - 1990
N2 - 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.
AB - 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.
KW - Anaerobic sediment
KW - Indigo disulfonate
KW - Indophenol
KW - Redox indicators
KW - Resorufin
UR - http://www.scopus.com/inward/record.url?scp=0025240053&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025240053&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0025240053
VL - 9
SP - 289
EP - 295
JO - Environmental Toxicology and Chemistry
JF - Environmental Toxicology and Chemistry
SN - 0730-7268
IS - 3
ER -