Bioremediation (Contact: Mette Broholm)
In situ anaerobic microbial reductive dechlorination is a potential remediation technology at sites contaminated with chlorinated solvents. Stimulation of the anaerobic processes by adding electron donor, nutrients, or bacteria in order to obtain full dechlorination is studied in laboratory batch experiments, pilot scale and full scale applications. Both high permeabilty settings and clayey till have been studied in collaboration with consulting companies and municipalities.
Monitored natural attenuation (Contact Poul L. Bjerg)
Chlorinated compounds (PCE/TCE), gasoline and oil, and pesticides are candidates for natural attenuation as they are degradable in the subsurface. The governing processes are studied at field sites representing different geological settings, contaminant distribution and redox conditions. Natural attenuation is documented by use of chemical fingerprinting, isotopic fractionation, molecular biological tools, degradation products, and laboratory batch experiments.
Attenuation of landfill gas and leachate Contact: Peter Kjeldsen)
Landfills produce biogas containing methane and trace gases with several potential negative effects (explosion hazards, global climate effects etc.) The attenuation of these gases in surrounding/overlying soils is studied though a combination of laboratory, field and modelling activities. Landfills produce contaminated drain water (leachate). Plumes of leachate from old landfills are threats to many aquifers. Natural attenuation of contaminants is studied in combined laboratory, field, and modelling activities.
Phytoremediation (Contact: Stefan Trapp)
Methods for removing pollutants (cyanide, oil, tar and PAHs) using plants are studied both in the laboratory and in the field. The potential success of soil remediation with plants can be predicted using a combination of uptake tests, toxicity tests, and long-term forecasting using mathematical modelling. Several field sites have recently been established.