Field examination of ground water quality as an indicator of microbiological activity at gasoline contaminated sites

Various portable electrodes and an on-line colorimetric test kit were used in the field to examine ground water quality as an indicator of natural bioremediation across two sites in Connecticut having subsurface gasoline contamination. The parameters examined included dissolved oxygen, dissolved car...

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Bibliographic Details
Published in:Chemosphere (Oxford) 1996-08, Vol.33 (3), p.421-436
Main Authors: Norkus, Rebecca Guisto, Maurer, Julie, Schultz, Nancy A., Stuart, James D., Robbins, Gary A., Bristol, Robert D.
Format: Article
Language:English
Subjects:
aerobes
Ammonia - chemistry
anaerobes
Applied sciences
biodegradation
Biodegradation, Environmental
Biological and physicochemical phenomena
bioremediation
Carbon Dioxide - analysis
Colorimetric Test Kit
Colorimetry
dissolved oxygen
Electrodes
Exact sciences and technology
Fresh Water - chemistry
Freshwater
Gas Permeable
Gasoline
Gasoline Contamination
groundwater
groundwater contamination
hydrocarbons
Hydrogen-Ion Concentration
Ion Selective
Ion-Selective Electrodes - standards
Natural Bioremediation
Natural water pollution
Nitrates - chemistry
Online Systems
Oxidation-Reduction
Oxygen - analysis
petroleum
Pollution
Quality Control
Reproducibility of Results
specific ion electrodes
Water Pollutants, Chemical - analysis
Water Purification - standards
water quality
Water treatment and pollution
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Summary:Various portable electrodes and an on-line colorimetric test kit were used in the field to examine ground water quality as an indicator of natural bioremediation across two sites in Connecticut having subsurface gasoline contamination. The parameters examined included dissolved oxygen, dissolved carbon dioxide, direct redox potential (E h), nitrate, ammonia and pH. These parameters permitted delineating regions of aerobic and anaerobic microbiological activity. Variations in these parameters over an eighteen month period along with gas chromatographic analyses of certain gasoline components in the ground water indicated that in-situ bioremediation was effective at containing the petroleum contamination at both sites. It was found that a new on-line colorimetric test kit for the determination of oxygen was more accurate than a commonly used dissolved oxygen electrode.
ISSN:0045-6535
1879-1298
DOI:10.1016/0045-6535(96)00207-X