Permeable reactive barriers (Contact: Peter Kjeldsen and Phillip J. Binning)
Efficiency of permeable reactive barriers containing zero-valent iron for treating groundwater polluted with chromate, nitroaromatic or chlorinated compounds is studied in laboratory experiments and in the field. The hydraulic performance as well as the long term reactivity of the zero-valent iron barriers are studied. Permeable reactive barriers containing calcite or crushed limestone are also being developed in laboratory and at the pilot scale for remediation of fluoride and cyanide contamination.
In situ chemical oxidation (Contact: Poul L. Bjerg)
In situ chemical oxidation (ISCO) may be an efficient remediation technology for contaminants like PCE and TCE. Laboratory batch tests for oxidant demand for potassium permanganate and persulfate consumption have been developed. Transport and diffusion processes in clayey till are studied as well, and the results are extended to field scale by investigations at contaminated sites.
Treatment trains (Contact: Poul L. Bjerg)
The approach where different remediation technologies are combined is promising for clean up of source zone areas with chlorinated solvents. Sequential use of thermal treatment and biological methods has been explored. Current focus is on in situ chemical oxidation with sodium persulfate as the initial step and microbial degradation as the second step. The target compounds are petroleum hydrocarbons, MTBE and creosote compounds. The experiments are performed at laboratory scale, but closely related to actual contaminated sites.
Environmental assessment (Contact: Poul L. Bjerg and Gitte Lemming)
Environmental assessment is a growing area in order to solve environmental problems in a cost effective and sustainable way. Methods for assessment of the technical, environmental and economic aspects of site remediation in order support decisions on remediation technology selection are being developed.