My research is focused on sustaining and improving soil, human, and global health by addressing a wide-range of biogeochemical processes between minerals, organic matter, microbes, and plants in the soil and water environment. My basic and applied research considers both temporal and spatial scales to study contaminant fate, soil and water remediation, nutrient availability, and carbon storage. Examples of my research interests include: (1) impacts of soil amendments on soil remediation of metal (sequestration and removal) and organic pollutants (bioremediation); (2) transport and degradation mechanisms of pharmaceuticals, PAHs, and other organic contaminants in soil and water; (3) plant uptake and accumulation of nanoparticles and metals for phytoremediation and food safety, (4) bacteria-