University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Karin Zehner
(2014):
Einsatz von durchströmten Fe0-reaktiven Barrieren zur Sanierung kontaminierter Grundwasserkörper
Untersuchung der Funktions- und Wirkungsweise anhand der Versuchskontaminanten Nickel und Arsen.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp 143.
UB BOKU
obvsg
- Abstract:
- Permeable reactive barriers are an economical and energy-efficient treatment solution for the in situ remediation of contaminated sites. By using a filter effect, which is achieved through the placement of water-permeable reactive materials in the path of the flow of contaminated groundwater, both organic and inorganic pollutants are immobilised or transformed by either physical, chemical or biological processes. Today zero valent iron is used more frequently as a reactive media, but in Austria there only is insufficient knowl-edge and experience about its performance regarding the application for the treatment of inorganic contaminations. In the context of this thesis two different, factory-made zero valent iron substrates were tested for their suitability to remove the inorganic contaminants nickel and arsenic from water. Batch experiments were carried out to study the effect of the pH on the removal process, the degradation kinetics and the sorption behaviour of nickel and arsenic on zero valent iron materials. For simulating a more realistic reactive barrier scenario column experiments were performed afterwards. These experiments helped reaching conclusions on the material’s stability and reactivity in a flow-through system. Furthermore, the mixing of the reactive materials with sand, which is done to make the reactive walls more permeable and to minimize the material costs, was analyzed. In general, all test results showed a good ability of the two zero valent iron materials for the usage in permeable reactive walls. For both materials the optimum removal capacity was ob-tained at a pH of 7 to 9. In all column tests the pollutants were efficiently eliminated over a long time interval. A loss of permeability and reactivity of the zero valent iron materials could not be observed during the whole testing period.
- Beurteilende(r): Puschenreiter Markus