Current Research Projects

	Incorporating biogeochemical processes in (sub)surface reactive transport models
	Incorporating biogeochemical processes in (sub)surface reactive transport models

	Fate and transport of contaminants in soils
	Impacts of aggregate-scale heterogeneity of transport and biogeochemical processes on selenium mobility in soil
	Elucidating the effects of molecular-scale physico-chemical processes on the fate and transport of engineered nanoparticles in soils

	Selenium toxicity in California
	Impacts of aggregate-scale heterogeneity of transport and biogeochemical processes on selenium mobility in soil
	Effects of increasing salinity and redox oscillation on selenium cycling and phylogenetic diversity in littoral sediments of the Salton Sea

	Environmental controls on reaction rates and microbial communities
	Effects of increasing salinity and redox oscillation on selenium cycling and phylogenetic diversity in littoral sediments of the Salton Sea
	Kinetics and rates of organic matter degradation coupled to nitrate, iron and sulfate reduction in wetland soils and littoral sediments
	Spatial patterns and modeling of reductive ferrihydrite transformation resulting from coupled biogeochemical and physical processes in soils

	Carbon and nutrients cycling in soils and sediments
	Kinetics and rates of organic matter degradation coupled to nitrate, iron and sulfate reduction in wetland soils and littoral sediments
	Effects of land use on water, nitrogen and carbon export from agricultural watersheds
	Space agriculture: Effects of low gravity on water flow, nitrogen cycling, and microbial biomass dynamics in a soil-based cropping unit

	Soil health and resilient agriculture
	Comparing the effects of chemical and organic fertilization on soil quality, plant productivity and insect pest incidence in tomato cropping systems

Fate and transport of contaminants in soils