Dr. Giebel’s expertise spans analytical and environmental chemistry, separation science and mass spectrometry, and stable isotope biogeochemistry. He has developed analytical methods, techniques, and sampling protocols for measuring the stable isotopic composition of atmospheric trace organic compounds including CO2, non-methane hydrocarbons, and oxygenated volatile organic compounds. Giebel is currently investigating the fate and transport of legacy and emerging organic contaminants at the bench-scale and in the environment over urban-suburban gradients. He and his colleagues use gas chromatography isotope ratio mass spectrometry, liquid chromatography tandem mass spectrometry, and various modelling/mapping techniques to perform ‘cradle to grave’ analyses of chemical residues and signatures across numerous environmental pools (i.e., soils, sediments, water, and air).
Giebel’s research is motivated by the following questions: Can sources of organic contaminants to the environment be differentiated? Are there ‘hot-zones’ in the environment where organic contaminants accumulate? Under what environmental conditions are organic contaminants degraded and over what timescales? Can independent and/or simultaneous degradation products be identified and used as a proxy for natural attenuation?