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Effect of diffusive/dispersive processes on stable isotope ratios of organiccontaminants in aquifer systems

English title Effect of diffusive/dispersive processes on stable isotope ratios of organiccontaminants in aquifer systems
Applicant Hunkeler Daniel
Number 139877
Funding scheme Project funding (Div. I-III)
Research institution Centre d'hydrogéologie et de géothermie Université de Neuchâtel
Institution of higher education University of Neuchatel - NE
Main discipline Hydrology, Limnology, Glaciology
Start/End 01.11.2012 - 31.10.2016
Approved amount 290'333.00
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Keywords (2)

Groundwater contamination; Isotopes

Lay Summary (English)

Lead
Lay summary
Organic chemicals are among the most common groundwater contaminants. Often the same type of contaminants can orignate from different sources for example old industrial sites or landfills. By measuring only the concentration of these contaminants it can be difficult to find out which source contributes how much to groundwater contamination. An alternative approach is the measurement of the isotopic composition of the chemicals. Identifical chemical compounds can contain a different amount of heavy and light isotopes of an element, for example carbon with a mass of 12 and carbon with a mass of 13. Hence the measurement of the isotopic composition of the contaminant in addition to its concentration can help to determine from which source a contaminant originates. However, in order to apply the method, it is important to know if the isotopic composition changes as the contaminants migrate through the subsurface. In this project, we investigate how isotope ratios evolve during their transport in groundwater. The project includes laboratory experiments which simulate the migration of contaminants in sand columns and field measurements. The project will make the isotope method to distinguish different sources of contaminants more reliable.  
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Isotope fractionation due to aqueous phase diffusion – What do diffusion models and experiments tell? – A review
Wanner Philipp, Hunkeler Daniel (2019), Isotope fractionation due to aqueous phase diffusion – What do diffusion models and experiments tell? – A review, in Chemosphere, 219, 1032-1043.
Assessing the effect of chlorinated hydrocarbon degradation in aquitards on plume persistence to back-diffusion
WannerPhilip, ParkerBeth, HunkelerDaniel (2018), Assessing the effect of chlorinated hydrocarbon degradation in aquitards on plume persistence to back-diffusion, in Science of the Total Environment, 633, 1602-1612.
Does sorption influence isotope ratios of chlorinated hydrocarbons under field conditions?
Wanner Philipp, Parker Beth L., Chapman Steven W., Aravena Ramon, Hunkeler Daniel (2017), Does sorption influence isotope ratios of chlorinated hydrocarbons under field conditions?, in Applied Geochemistry, 84, 348-359.
Quantification of degradation of chlorinated hydrocarbons in saturated low permeability sediments using compound-specific isotope analysis
Wanner Philipp, Parker Beth L., Chapman S. W., Aravena R., Hunkeler D. (2016), Quantification of degradation of chlorinated hydrocarbons in saturated low permeability sediments using compound-specific isotope analysis, in Environmental Science and Technology, 50(11), 5622-5630.
Carbon and chlorine isotopologue fractionation of chlorinated hydrocarbons during diffusion in water and low permeability sediments
Wanner Philipp, Hunkeler Daniel (2015), Carbon and chlorine isotopologue fractionation of chlorinated hydrocarbons during diffusion in water and low permeability sediments, in Geochimica et Cosmochimica Acta, 157, 198-212.

Collaboration

Group / person Country
Types of collaboration
University of Guelph, Canada, Beth Parker Canada (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
DTU Denmark, Massimo Rolle Denmark (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
- Exchange of personnel
Prof. Ian Bourg, Princeton University United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Swiss Geoscience Meeting Talk given at a conference Identification of biodegradation of chlorinated hydrocarbons in low permeability sediments using compound-specific isotope analysis (CSIA) 21.11.2015 Basel, Switzerland Hunkeler Daniel; Wanner Philipp;
42nd IAH International Congress, AQUA 2015 Talk given at a conference Identification of biodegradation of chlorinated hydrocarbons in low permeability sediments using compound-specific isotope analysis (CSIA) 13.09.2015 Rome, Italy Hunkeler Daniel; Wanner Philipp;
Focus Consortium Annual Meeting Talk given at a conference Identification of biodegradation of chlorinated hydrocarbons in low permeability sediments using compound-specific isotope analysis (CSIA) 30.10.2014 Denver, United States of America Hunkeler Daniel; Wanner Philipp;
In Situ Remediation Talk given at a conference Identification of biodegradation of chlorinated ethenes in low permeability sediments using compound-specific isotope analysis (CSIA) 02.09.2014 London, Great Britain and Northern Ireland Hunkeler Daniel; Wanner Philipp;
Consortium Annual Meeting Talk given at a conference Identification of biodegradation of chlorinated ethenes in low permeability sediments using compound-specific isotope analysis (CSIA) 04.06.2014 Guelph, Canada Wanner Philipp; Hunkeler Daniel;


Knowledge transfer events



Self-organised

Title Date Place
Continuing education course on contaminated sites. 11.09.2014 Neuchâtel, Switzerland

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