Profile

Research

My research interests comprise the understanding of trace element behavior, reactivity and fate in environmental systems. I am particularly interested in the environmental dispersion and fate of anthropogenic tracers within the natural biogeochemical cycle of elements. This topic is based on the field of isotope geochemistry, with a directed focus on radionuclide mobility thanks to the similar geochemical behavior between the isotopes of a given element (i.e., active vs non-active). My expertise until now includes studies on elemental sorption (e.g., kinetics, isotherms), solid/liquid partitioning (e.g., Kd values), carrier phases (e.g., selective extractions), and bioaccumulation factors (e.g., organotropism) in continent-ocean transition systems. Fundamental approaches including element speciation and mineral surface behavior (e.g., colloidal stability, inter-particle interactions, and surface complexation models) are also part of my research field. My current objective is to combine both fundamental and environmental approaches at the interface of aquatic systems in order to boost the current knowledge of both commonly studied and less monitored elements, including Co, Cs, Ga, Ge, In, I, Nb, Ni, Sb, Se, Sn, Sr, Te, and Y.

Projects

“Bereich 4”: environmental dispersion of trace elements in aquatic systems

Elemental speciation, carrier phases and transfer between environmental compartments determine the dispersion, bioaccumulation and fate of relevant trace metals and metalloids. The impact of such mobility depends on the elemental concentrations (e.g., anthropogenic vs geogenic releases) and retention times, coupled to environmental processes (e.g., drought vs floods, seasonal effects, etc.). Identifying and understanding the key processes controlling the reactivity and behavior of trace elements, are indispensable for evaluating the environmental impact of society as well as the potential exposure of organisms to elements of concern. This topic is of particular relevance in the current context of energetic transition where Europe will face a period of coexisting nuclear activities including operation/decommissioning of nuclear power plants, storage of nuclear waste and fuel reprocessing, providing indispensable knowledge for society and decision-making regarding nuclear risk assessment and post-accidental management.

Publications