Hydrogeology, Groundwater, Contaminants and Pollution
As an affiliated professor, I am currently a Hydrologist in the Twin Cities at US Geological Survey, Upper Midwest Water Science Center. I am the team leader and principal investigator for the National Water Quality Assessment (NAWQA) program's work in the Glacial Principal Aquifer System. I have been working in the hydrogeology field since 1993, starting first in environmental consulting and then moving into groundwater-related research in 1998. I was a research scientist for the Minnesota Department of Health and the Minnesota Pollution Control Agency, before moving to the federal government with USGS in 2009. My favorite research topic is occurrence and mobilization of arsenic in natural groundwater systems. Developing models for the behavior of arsenic in the natural environment is elusive due to its complex associations with other metals and minerals, and the interplay of redox, pH, biogeochemistry, and hydrogeology. Even after 20 years of arsenic research, I continue to be fascinated.
Nicholas, Sarah L., Melinda L. Erickson, Laurel G. Woodruff, Alan R. Knaeble, Matthew A. Marcus, Joshua K. Lynch, and Brandy M. Toner. "Solid-phase arsenic speciation in aquifer sediments: A micro-X-ray absorption spectroscopy approach for quantifying trace-level speciation." Geochimica et Cosmochimica Acta 211 (2017): 228-255.
Cozzarelli, Isabelle M., Madeline E. Schreiber, Melinda L. Erickson, and Brady A. Ziegler. "Arsenic cycling in hydrocarbon plumes: secondary effects of natural attenuation." Groundwater 54, no. 1 (2016): 35-45.
Bekins, Barbara A., Isabelle M. Cozzarelli, Melinda L. Erickson, Ross A. Steenson, and Kevin A. Thorn. "Crude oil metabolites in groundwater at two spill sites." Groundwater 54, no. 5 (2016): 681-691.
Erickson, Melinda L., and Randal J. Barnes. "Glacial sediment causing regional‐scale elevated arsenic in drinking water." Groundwater 43, no. 6 (2005): 796-805.
Erickson, Melinda L., and Randal J. Barnes. "Well characteristics influencing arsenic concentrations in ground water." Water Research 39, no. 16 (2005): 4029-4039.