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Open Access Green as soon as Postprint is submitted to ZB.
Factors determining the attenuation of chlorinated aliphatic hydrocarbons in eutrophic river sediment impacted by discharging polluted groundwater.
Environ. Sci. Technol. 43, 5270-5275 (2009)
This study explored them potential of eutrophic river sediment to attenuate the infiltration of chlorinated aliphatic hydrocarbon (CAH)- polluted groundwater discharging into the Zenne River near Brussels, Belgium. Active CAH biodegradation by reductive dechlorination in the sediment was suggested by a high dechlorination activity in microcosms containing sediment samples and the detection of dechlorination products in sediment pore water. A unique hydrogeochemical evaluation, including a delta H-2 and delta O-18 stable isotope approach, allowed to determine the contribution of different abiotic and biotic CAH attenuation processes and to delineate their spatial distribution in the riverbed. Reductive dechlorination of the CAHs seemed to be the most widespread attenuation process, followed by dilution by unpolluted groundwater. discharge and by surface water mixing. Although CAHs were never detected in tie surface water, 26-28% of the investigated locations in the riverbed did not show CAH attenuation. We conclude that the. riverbed sediments can attenuate infiltrating CAHs to a certain extent, but will probably not completely prevent CAHs to discharge from the contaminated groundwater into the Zenne River.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
surface-water; mineralization; aquifer; scale; zone
Language
english
Publication Year
2009
HGF-reported in Year
2009
ISSN (print) / ISBN
0013-936X
e-ISSN
1520-5851
Quellenangaben
Volume: 43,
Issue: 14,
Pages: 5270-5275
Publisher
ACS
Publishing Place
Washington, DC
Reviewing status
Peer reviewed
Institute(s)
Institute of Groundwater Ecology (IGOE)
POF-Topic(s)
20403 - Sustainable Water Management
Research field(s)
Environmental Sciences
PSP Element(s)
G-504300-004
PubMed ID
19708352
Scopus ID
67650462893
Erfassungsdatum
2009-12-31