I am an Environmental Toxicologist.  My research group investigates the environmental fate, transport and ecotoxicology of trace-elements and engineered nanomaterials. Much of our research focuses on the transformations and impacts of trace-elements and nanomaterials in terrestrial and wetland environments. We have developed tools that utilize advanced analytical, imaging and spectroscopic techniques to investigate the environmental transformations, bioavailability, bioaccumulation, trophic transfer and maternal transfer of these contaminants. We relate this information to adverse organismal effects with population level relevance.  We also work in the area of environmental health focusing on human exposure to trace-elements in support of epidemiology studies being conducted by the Markey Cancer Center and community-engaged research focused on drinking water quality and human health in Appalachian Kentucky.