On February 21, 2012, Corin Hammond, a doctoral student in the University of Arizona (UA) Superfund Research Program (SRP) was an invited speaker in the “Superfund Research Program Trainee Webinar Series” sponsored by the National Institutes of Environmental Health Sciences. This series was developed to feature graduate and post-doctoral trainees performing SRP-funded research. Ms. Hammond and the other speakers in the series are previous Poster Award Winners from the SRP Annual Meeting in 2011.
Ms. Hammond described her work on “Biogeochemical Transformation of Metal(loid)s during Phytostabilization of Iron King Mine Tailings, Dewey-Humboldt, Arizona.” She described the Superfund site, a large mass of exposed un-vegetated mine tailings with high concentrations of arsenic and lead, and detailed the phytostabilization field trial that is underway to test the growth of plants as a bio-remediation strategy. Her work uses analytical wet chemistry and synchrotron-bases X-ray methods to characterize the effect of irrigation water and plants on weathering of the mineral components of the soil, the effect of compost addition on arsenic mobility, and the relationship between iron mineral weathering and arsenic mobility. Ms. Hammond hopes that her research will help to bridge the gap between bench-scale and field-scale investigation of contaminated mine site remediation.