My primary research interests are the study of the fate and transport of contaminants in the environment. My recent work focuses primarily on the environmental fate of mercury and arsenic.  Specific research topics include investigation of natural sources of atmospheric mercury, the role of plants in biogeochemical cycling of mercury, mercury pollution in the Steamboat Creek- Truckee River Watershed, arsenic in the Humboldt River and in ground waters in Fallon, NV.  I have also investigated the fate of trifluoroacetic acid and organophosphate pesticides.  I am especially interested in the role that atmosphere and vegetation play as sources, sinks and pathways for the cycling of environmental contaminants.