University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Doris Beck
(2012):
DGT as an assessment tool for the impact of soil amendments on the bioavailability of cadmium and zinc.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp 60.
UB BOKU
obvsg
- Abstract:
- Phytoremediation and soil amendments have been suggested as low-cost and environmentally friendly alternatives to conventional soil remediation techniques. To ensure the effectiveness and proper application in real world conditions thorough planning and decision tools are necessary. Here we tested the application of Diffusive Gradient in Thin films (DGT) to predict the effect of two soil amendments used for immobilizing Cd and Zn in four polluted soils. Furthermore, DGT was also used to predict Cd and Zn uptake in barley (Hordeum distichon L.) straw and grain grown on the experimental soils in a pot experiment. Our results show that DGT-derived parameters may be useful in predicting the efficiency of immobilizing soil amendments and thus partly replace laborious plant experiments. DGT was able to identify soils with strong versus little response of metal availability to soil amendments. Moreover, it was also successfully employed as a monitoring tool for evaluating the effect of plant growth on TE uptake, indicating complex interactions between TE removal by plant, TE mobilization by root activities and soil controls such as buffer power and contamination level. Finally, DGT was successfully in predicting Cd and Zn uptake in barley tissues under diffusion-limited conditions but limitations were found due to Zn toxicity in a highly polluted soil. We conclude that DGT hold promise as evaluation and monitoring tool for in-situ treatment of metal-polluted soils.
- Beurteilende(r): Wenzel Walter
- 1.Mitwirkender: Puschenreiter Markus