University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Johannes Friedl
(2006):
In situ Immobilisierung von Schwermetallen mittels Bodenzusätzen in Kombination mit unterschiedlichen Gerstensorten: Batch- und Gefäßversuch.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp n.a..
UB BOKU
obvsg
- Abstract:
- Effective and environmentally sound remediation techniques are required to minimize the transfer of heavy metals to the food chain and surrounding eco-systems. Two batch experiments and a pot experiment were carried out with two different soils from the vicinity of a former Pb-Zn smelter in Arnoldstein, that are highly polluted with Pb, Zn, Cd and As. Within an optimisation process on the batch experiment level, we selected ferrihydrite, red mud, gravel sludge, bio compost, and lime for a pot experiment out of 15 amendments. Out of 7 locally grown barley cultivars, we found one typical heavy metal ¿excluding¿ cultivar (BODEGA) and one ¿accumulating¿ cultivar (HELLANA). The pot experiment yielded promising results, e.g. reduction compared to the controls of the labile Cd (25% soil A; 41 % soil B) and Pb (13% soil A; 44 % soil B), and the uptake of Cd (53% soil A; 62% soil B) and Pb (68% Boden A; 32% Boden B) into barley grain. The combination of ferrihydrite (0,5%) and gravel-sludge (2%) showed the best results reducing Cd- and Pb-uptake into barley grain. The immobilisation of labile heavy metals by soil amendments, combined with the selection of metal-excluding cultivars, can be used as tools for managing extensively contaminated land. The decision for the use of selected amendments should be based on the specific site and soil characteristics according to field experiment results.
- Beurteilende(r): Gerzabek Martin