University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Claudia Delgado
(2011):
Extraktion von PAK kontaminierten Böden mittels Pflanzenöl.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp 113.
UB BOKU
obvsg
- Abstract:
- Polycyclic Aromatic Hydrocarbons (PAHs) are a group of several hundred compounds, whose structure consist of at least two interconnected benzene rings. Because some PAH compounds are mutagens and carcinogens, 16 PAH compounds are listed in the U.S. Environmental Protection Agency (EPA) priority list of pollutants. PAHs are strongly adsorbed to soils, are highly persistent and show minimal bioavailability. Therefore these pollutants represent a significant problem for soil remediation. The goal of the project ISPAK were the development of a new in-situ-remediation method for soils contaminated with PAHs. This method is based on the use of vegetable oil for the desorption of PAHs. This thesis was written as part of the project ISPAK and the principal aims of this work are to analyze on the one hand the capacity of rapeseed oil to remove PAHs from soils and on the other hand the possibility to clean the oil used in the process. The experiments in laboratory scale were conducted in glass columns containing soils of different compaction levels and different water retention capacities. To assess the influence of soil moisture onto the extraction of PAHs using rapeseed oil, different gravimetric water contents (air-dried, 50%, 75%) were used. The influence of different soil compaction levels was also tested. For extractions experiments a soil:oil ratio of 1:0.6 and 1:2 was used. The 16-PAH content in the soil was determined at the beginning and the end of the column extraction tests. This analysis showed that the PAHs content in the soil was reduced by up to 60% after the extraction with rapeseed oil. The examination of the remaining rapeseed oil in the soil showed, that more oil remained in the air-dried soil. The recovered oil could be cleaned by active charcoal-filtration, reducing the PAHs content by 95%.
- Beurteilende(r): Gerzabek Martin
- 1.Mitwirkender: Soja Gerhard