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Université de Neuchâtel

Assessing chlorinated ethene degradation in a large scale contaminant plume by dual carbon–chlorine isotope analysis and quantitative PCR

Hunkeler, Daniel ; Abe, Y ; Broholm, M.M ; Jeannottat, S ; Westergaard, C ; Jacobsen, C.S ; Aravena, R ; Bjerg, P.L

In: Journal of Contaminant Hydrology, 2011, vol. 119, p. 69-79

The fate of chlorinated ethenes in a large contaminant plume originating from a tetrachloroethene (PCE) source in a sandy aquifer in Denmark was investigated using novel methods including compound-specific carbon and chlorine isotope analysis and quantitative real-time polymerase chain reaction (qPCR) methods targeting Dehaloccocides sp. and vcrA genes. Redox conditions were...

Université de Neuchâtel

Documentation of time-scales for onset of natural attenuation in an aquifer treated by a crude-oil recovery system

Ponsin, V ; Maier, J ; Guelorget, Y ; Hunkeler, Daniel ; Bouchard, D ; Villavicencio, H ; Höhener, P

In: Science of the Total Environment, 2015, vol. 512-513, p. 62-73

A pipeline transporting crude-oil broke in a nature reserve in 2009 and spilled 5100 m3 of oil that partly reached the aquifer and formed progressively a floating oil lens. Groundwater monitoring started immediately after the spill and crude-oil recovery by dual pump-and-skim technology was operated after oil lens formation. This study aimed at documenting the implementation of...

Université de Neuchâtel

Stable carbon isotope analysis to distinguish biotic and abiotic degradation of 1,1,1-trichloroethane in groundwater sediments

Broholm, M.M ; Hunkeler, Daniel ; Tuxen, N ; Jeannottat, S ; Scheutz, C

In: Chemosphere, 2014, vol. 108, p. 265-273

The fate and treatability of 1,1,1-TCA by natural and enhanced reductive dechlorination was studied in laboratory microcosms. The study shows that compound-specific isotope analysis (CSIA) identified an alternative 1,1,1-TCA degradation pathway that cannot be explained by assuming biotic reductive dechlorination. In all biotic microcosms 1,1,1-TCA was degraded with no apparent increase in the...

Consortium of Swiss Academic Libraries

Geomicrobial processes in the subsurface: A tribute to Johannes Neher's work

Feldmann, Mark

In: FEMS Microbiology Reviews, 1997, vol. 20, no. 3-4, p. 181-189