NDLI: Benzene oxidation under sulfate-reducing conditions in columns simulating in situ conditions

Content Provider	Springer Nature Link
Author	Vogt, Carsten Gödeke, Stefan Treutler, Hanns Christian Weiß, Holger Schirmer, Mario Richw, Hans Hermann
Copyright Year	2006
Abstract	The oxidation of benzene under sulfate-reducing conditions was examined in column and batch experiments under close to in situ conditions. Mass balances and degradation rates for benzene oxidation were determined in four sand and four lava granules filled columns percolated with groundwater from an anoxic benzene-contaminated aquifer. The stoichiometry of oxidized benzene, produced hydrogen carbonate and reduced sulfate correlated well with the theoretical equation for mineralization of benzene with sulfate as electron acceptor. Mean retention times of water in four columns were determined using radon (222Rn) as tracer. The retention times were used to calculate average benzene oxidation rates of 8–36 μM benzene day−1. Benzene-degrading, sulfide-producing microcosms were successfully established from sand material of all sand filled columns, strongly indicating that the columns were colonized by anoxic benzene-degrading microorganisms. In general, these data indicate a high potential for Natural Attenuation of benzene under sulfate-reducing conditions at the field site Zeitz. In spite of this existing potential to degrade benzene with sulfate as electron acceptor, the benzene plume at the field site is much longer than expected if benzene would be degraded at the rates observed in the column experiment, indicating that benzene oxidation under sulfate-reducing conditions is limited in situ.
Starting Page	625
Ending Page	636
Page Count	12
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	18
Issue Number	5
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2006-12-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Benzene Degradation Natural attenuation Sulfate-reducing conditions Waste Management/Waste Technology Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Terrestrial Pollution Geochemistry Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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