My group’s research interests involve understanding how sulfur and iron interact in sediments to transform and mobilize contaminants, especially at redox interfaces. We study fundamental and practical aspects of environmental aquatic chemistry, sediment biogeochemistry, and biological and chemical processes related to contaminant transport and transformations. Most of our work involves understanding contaminant (mercury and trace organics) interactions with the bulk elemental cycles of sulfur, iron, and carbon. All of our projects are related to developing management strategies for water quality challenges in natural and engineered systems. We typically try to complement field or laboratory investigations with mathematical modeling.