Angebotene Master-Arbeiten
| Auswirkungen des Klimawandels auf Wasserressourcen in Bayern In Zusammenarbeit mit dem Bayerischen Landesamt für Umwelt bieten wir mehrere Themen an, die sich mit den Auswirkungen des Klimawandels auf Quantität und Qualität von Oberflächen- und Grundwasser und die Bewirtschaftung von Wasserressourcen befassen. Diese Arbeiten sind an der Schnittstelle zwischen Wissenschaft und Management von Gewässern angesiedelt und verwenden vor allem die umfangreichen Datensätze der Wasserverwaltung. Sie bieten darüberhinaus die Möglichkeit, Kontakte zum LfU, Wasserwirtschaftsämtern und Wasserversorgern zu knüpfen. Wenn Sie mehr erfahren möchten, melden Sie sich bitte bei Prof. Stefan Peiffer oder Dr. Luisa Hopp! Veröffentlicht: 08-Feb-2022 Ansprechpartner: Luisa Hopp, Stefan Peiffer |
| Impact of Mn on Fe mineralization pathways in wetland soils and sediments
MOTIVATION: Iron (Fe) is the fourth most abundant element on the earth’s surface. Due to its redox-sensitivity and its sorption capacity for nutrients and contaminants, it plays a particularly important role in the environmental biogeochemistry of wetland soils and sediments.
In soils with a fluctuating water table, the microbial reduction of Fe(III) generates Fe(II). The produced Fe(II) may interact with the remaining solid phase, thus catalyzing the transformation of metastable Fe oxides (e.g. ferrihydrite) to stable minerals such as goethite. Interestingly, previous research has shown that the co-occurrence of manganese (Mn) in such soils appears to trigger the formation of feroxyhyte, a relatively rare Fe oxide that has been largely overlooked in the past. The factors and mechanisms driving the switch to feroxyhyte formation in the presence of Mn remain, however, elusive. AIM: Using a controlled laboratory experiments and innovative analytical techniques, this project will investigate the impact of Mn on the formation of secondary Fe phases and resolve the specific structural mechanisms that control feroxyhyte formation at high Mn loadings. WE OFFER individual supervision by enthusiastic researchers and of state-of-the-art approaches for the characterization of aqueous and solid phases (XRD, Mössbauer analysis, SEM, TEM, FTIR). You will become familiar with all practical aspects of science and learn how to design, run, analyse and present experiments that target at your research question. YOU ARE a highly motivated student with a strong interest in experimental work in the geosciences and with passion for research. Previous experience with analytical and laboratory techniques is an asset, but no prerequisite. If you are interested or if you need any further information, feel free to contact Dr. Kerstin Hockmann at kerstin.hockmann@uni-bayreuth.de or visit www.kerstinhockmann.com. Published: 25/1/2021
Ansprechpartner: Kerstin Hockmann |
