Université de Neuchâtel

Isotope fractionation of volatile organic compounds in porous media under variably saturated conditions

Jeannottat, Simon ; Hunkeler, Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

Compound-specific isotope analysis (CSIA) has proven to be an effective tool to assess in-situ biodegradation of volatile organic compounds (VOCs) in groundwater and to distinguish between different contaminant sources. There is an increasing interest to apply the CSIA method also in unsaturated zone studies. However, under variably saturated conditions, physical processes such as phase...

Université de Neuchâtel

Origin and behaviour of microorganisms and particles in selected karst aquifer systems

Pronk, Michiel ; Zwahlen, François (Dir.) ; Goldscheider, Nico (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th. 2101.

Karst aquifers represent an important groundwater resource world-wide. They are, however, highly vulnerable to contamination due to fast transport and limited contaminant attenuation processes encountered in such systems. Pathogenic microorganisms are among the most frequent and problematic contaminants in groundwater from karst aquifers. It is generally accepted that the presence of faecal...

Université de Neuchâtel

Use of stable isotope analysis to assess biodegradation of volatile organic compounds in the unsaturated subsurface

Bouchard, Daniel ; Hunkeler, Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 1914.

The general aim of the project is to evaluate the feasibility of using compound-specific isotope analysis (CSIA) to assess biodegradation of petroleum hydrocarbons in the unsaturated zone. The first objective was to quantify the isotope enrichment factors during biodegradation of several volatile organic compounds (VOCs) commonly found on petroleum hydrocarbon contaminated sites. These microcosm...