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Gewählte Master / Diploma Thesis:

Sarah Quast (2016): Phytoremediation von Trichlorethen Etablierung von Mikrokosmen zur Bilanzierung der Aufnahme, Metabolisierung und der Volatilisierung von im Grundwasser gelösten TCE durch Pappeln..
Master / Diploma Thesis - Institut für Bodenforschung (IBF), BOKU-Universität für Bodenkultur, pp 99. UB BOKU obvsg FullText

Data Source: ZID Abstracts
In this work the uptake of trichloroethylene (TCE) by plants was investigated. The chemical substance TCE belongs to the group of volatile organic compounds (VOC) and is one of the major contaminants of polluted soils of groundwater in Austria. Phytoremediation is a biological in-situ-method to remediate contaminated soils through the use of plants. Phytotransformation is the breakdown of contaminants by plants through metabolic processes in leaves, roots und branches. In the process of phytovolatilization the contaminant is taken up by the plant and released through transpiration into the atmosphere. Based on these processes a microcosm-system was established in order to create a mass balance for the first 24 days of the experiment to be able to measure the single mass flows. The experiment took place in a climate chamber with artificial lighting and regulated inlet and outgoing air. This was done by the use of ten gas-tight microcosms; in the five TCE-plants and two controls, hybrid poplar cuttings were inserted and three dummies were equipped with a Teflon-stick instead of a plant. The root zone as well as the leaf zone was gas-tight enclosed with an interspace in between to be able to determine possible losses. A TCE-spiked nutrient solution with 144 mg/L was injected into the root zone. Two plants died in the very beginning and three out of the five plants with TCE showed no damage to their vitality. However, all tested plants died at the latest, 53 days after TCE was added. A microbial degradation was not observed. Despite the difficulties it can be said with certainty that in this experiment, only a certain part of the TCE was metabolized in the plant and the majority was delivered via transpiration into the atmosphere.

Beurteilende(r): Zechmeister-Boltenstern Sophie

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