Contamination from Sources with Mixed Wastes
scientists conducting a tracer test where clean, oxygenated groundwater was injected into an anoxic zone beneath the sewage infiltration beds. The tracer test was part of a study of the natural restoration of a subsurface sewage plume after the use of the infiltration beds (the source of the plume) was discontinued.
-- from the Cape Cod
Bibliography 746 Publications
Many contaminant sources introduce a diverse and complex mixture of organic and inorganic
contaminants into the subsurface, which can complicate characterizations of contaminant transport,
fate and effects. These sources include landfills and wastewater discharges. The resulting
contaminant plumes are difficult to characterize, manage, and remediate. Reactions among dissolved
chemicals, reactions between dissolved chemicals and the aquifer material, and microbial reactions
can significantly accelerate or retard contaminant movement and complicate natural and engineered
cleanup. Ongoing research focuses on defining source mixtures, developing field methods for
characterization, quantifying transport processes and development of simulation modeling
capabilities. Current research focuses on the following three areas:
Landfill Leachate in Alluvial Aquifers --
Sewage Contamination in Sand and Gravel
Aquifers -- Cape Cod, Massachusetts
Mixed, Low-level Radioactive and Other Wastes
-- Amargosa Desert Research Site, Nevada
Program Science Feature Articles on Mixed Waste Contamination Research
- Microbial-sized, carboxylate-modified microspheres as surrogate tracers in a variety of subsurface environments: an overview: Harvey, R.W., Metge, D.W., and LeBlanc, D.R., in Proceedings of the 15th Water-Rock Interaction International Symposium, WRI-15--Procedia--Earth and Planetary Sciences, Elsevier, (IN PRESS).
- Future research needs involving pathogens in groundwater: Bradford, S.A., and Harvey, R.W., 2016, Hydrogeology Journal, p. 1-8, doi:10.1007/s10040-016-1501-0 (Advanced Web release).
- Bounded fractional diffusion in geological Media--Definition and lagrangian approximation: Zhang, Y., Green, C.T., LaBolle, E.M., Neupauer, R.M., and Sun, H., 2016, Water Resources Research, v. 52, no. 11, p. 8561-8577, doi:10.1002/2016WR019178.
- Anoxic nitrate reduction coupled with iron oxidation and attenuation of dissolved arsenic and phosphate in a sand and gravel aquifer: Smith, R.L., Kent, D.B., Repert, D.A., and Böhlke, J.K., 2017, Geochimica et Cosmochimica Acta, v. 196, p. 102-120, doi:10.1016/j.gca.2016.09.025.