Peggy O'Day

O'Day's research is in the area of mineral-aqueous interface geochemistry as it relates to the chemistry and mobility of inorganic chemical species in the environment. She applies a variety of spectroscopic and microscopic techniques, in particular synchrotron X-ray methods, to studies of contaminant cycling, bioavailability, and remediation in natural systems.

Current research projects include:

• Arsenic speciation, cycling and bioavailability
• Environmental influences on mercury speciation and methylation
• Novel methods for remediation of soils and sediments through application of reactive amendments
• Strontium and cesium uptake and release by weathering products related to radionuclide contamination at Hanford, WA
• Mechanisms and rates of abiotic and biotic uranium oxidation linked to nitrogen and iron cycling