Services

Map of isotopic enrichments in a contaminated plume

Map of isotopic enrichments in a contaminated plume

 

Provide evidence for natural attenuation at contaminated sites with quantitative isotopic tools (monitored natural attenuation)

  • We detect the enrichment of heavy isotopes (13C) in residual contaminants and calculate the amount of biodegradation.
  • Dominant terminal electron-accepting processes (e.g. sulphate and nitrate reduction) are evaluated by characterising changes in isotopic signatures (34S/32S, 15N/14N, 18O/16O in sulfate and nitrate).

Validating the effectiveness of in situ bioremediation (enhanced natural attenuation)

  • Quantifying the isotopic enrichment at a treatment site will allow us to validate the effectiveness of a remediation regime.

Schematische Darstellung einer SchadstofffahA schematic of BACTRAP distribution in a groundwater well

A schematic of BACTRAP distribution in a groundwater well

 

Sensitive and direct proof of biodegradation within a contaminant plume by the use of in situ microcosms

  • We directly monitor in situ biodegradation in a groundwater system by using microcosms (BACTRAPs) that are loaded with isotopically-labelled contaminant (13C). After recovery, incorporation of 13C into the biomolecules of bacteria will demonstrate that active remediation is taking place within the contaminant plume.
   

Localization and elucidation of the plume structure and contaminant source

  • Isotopic fingerprints of chemicals allow us to identify the contaminant source and, potentially, pinpoint the contaminant manufacturer.
   

Hydrological assessments of groundwater quality

  • Tracer isotopes such as deuterium, tritium, 18O and noble gases allow us to estimate the age, catchment area and transport patterns of a groundwater system.