Oxidation and Acidification of Anaerobic Sediment‐Water Systems by Autoclaving

The effect of autoclaving on the acid/base and redox properties of anaerobic sediment slurries was determined to facilitate the interpretation of autoclaved controls in studies of environmental reduction reactions. Autoclaving decreased electrode measurements of pH by 0.26 to 0.68 units and increase...

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Bibliographic Details
Published inJournal of environmental quality Vol. 22; no. 2; pp. 375 - 378
Main Authors Tratnyek, Paul G., Wolfe, N. Lee
Format Journal Article
LanguageEnglish
Published Madison, WI American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America 01.04.1993
Crop Science Society of America
American Society of Agronomy
Subjects
Analysis methods
Applied sciences
Exact sciences and technology
Pollution
Soil and sediments pollution
Electrodes
Oxidation reduction
Pollutant behavior
Check
pH
Autoclaving
Soil pollution
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Summary:The effect of autoclaving on the acid/base and redox properties of anaerobic sediment slurries was determined to facilitate the interpretation of autoclaved controls in studies of environmental reduction reactions. Autoclaving decreased electrode measurements of pH by 0.26 to 0.68 units and increased electrode measurements of Eh by 34 to 94 mV. To corroborate this effect, we added redox indicators to the slurries and observed that autoclaving caused a shift in color consistent with the change in electrode measurements. Further investigation demonstrated that the observed effects are a common characteristic of autoclaving anaerobic sediment and are not limited to very restricted sediment types and are not artifacts of the way the experiments were performed.
Bibliography:Mention of trade names or commercial product does not constitute endorsement or recommendation by the USEPA.
ISSN:0047-2425
1537-2537
DOI:10.2134/jeq1993.00472425002200020019x