Fate of microbial metabolites of hydrocarbons in a coastal plain aquifer: the role of electron acceptors
Article Abstract:
Field and laboratory studies were conducted to examine how the availability of electron acceptors affects the distribution and biodegradability of low molecular weight organic acids in a shallow, gasoline-contaminated aquifer. Field results showed that low molecular weight organic acids were associated with the degradation of hydrocarbons in anoxic zones of the aquifer. Changes in electron acceptor availability over time resulted in changes in the composition and concentration of the organic acid pool. Laboratory results confirmed that the fate of low molecular weight organic acids in groundwater depends on the nature of the acids and electron acceptor availability.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Reduced permeability in groundwater remediation systems: role of mobilized colloids and injected chemicals
Article Abstract:
The re-deposition of colloids mobilized in the aquifer and gas binding due to hydrogen peroxide decomposition, rather than to iron precipitation, likely caused the reduced permeability of the aquifer near delivery systems. This was found following an investigation of the effects of iron oxidation state and concentration, the presence of colloidal materials and the impact of nutrient solutions and hydrogen peroxide in the feedwater on the permeability of the aquifer material in the bioremediation experience at Eglin Air Force Base in Florida. Bioremediation at the site was stopped because of the failure of delivery systems owing to iron precipitation.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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