Ph.D. Stanford University. Environmental Engineering. 1987.
M.S. Stanford University. Chemical Engineering. 1982.
M.S. Stanford University. Environmental Engineering. 1980.
B.S. Stanford University. Chemistry. 1980.
Professor Hayes' primary research interests are focused on the effects that mineral surfaces and interfacial properties have on the transport and transformation processes of environmental organic (e.g., chlorinated organic compounds) and inorganic contaminants (e.g., elements like As, Cd, Hg, and radioactive materials such as uranium). She is also applying green chemistry and sustainability engineering principles for reducing environmental burdens associated with engineered infrastructure systems related to sustainable water supplies and water treatment systems. Recent interests in this later area include the development of biological activated carbon systems for treating drinking water sources contaminated with inorganic pollutants for application in developed and developing countries and evaluation and reduction of environmental burdens on water quality associated with energy production.
Specific activities include: (1) development of nanoscale particles for surface-catalyzed reductive dechlorination and metal ion or radionuclide sequestration for groundwater remediation, (2) reformulation and production of environmentally sustainable metal working fluidic systems for lubrication and cooling, (3) development of bioreactor systems for simultaneous removal of nitrate, arsenic, mercury, uranium or other toxic metal or metalloid ions, and (4) assessment of the impact of hydrofracking practices on ground and surface water quality. The specific objectives of the above are to: (i) optimize reduced iron systems for transforming chlorinated contaminants to harmless by-products, (ii) contain metals, metalloids, or radionuclides in groundwater at contaminated field sites, (iii) design, evaluate, and optimize “green” metal working fluids (MWF) for enhanced performance, longevity, and low environmental impact compared to traditional MWFs, (iv) develop novel water treatment systems to provide sustainable water supplies for municipalities whose drinking water sources come from contaminated groundwater, and (v) to investigate the potential of hydrofracking fluids to leach toxic metals, metalloids, and radionuclides from subsurface sediments, to develop improved treatment methods for these fluids, and to evaluate their potential to contaminant groundwater and surface water based on current practice.
Y. Bi, S. P. Hyun, R. Kukkadapu, and K.F. Hayes, “Oxidative Dissolution of UO2 in a Simulated Groundwater Containing Synthetic Nanocrystalline Mackinawite,” Geochimica et Cosmochimica Acta, in review, 2012.
G. Upadhyaya, T. Clancy, J. Brown, K. F. Hayes, and L. Raskin, “Optimization of Arsenic Removal Water Treatment System through Characterization of Terminal Electron Accepting Processes,” Environmental Science and Technology, accepted, 2012.
S.D. Supekar, A.F. Clarens, K.F. Hayes, and S.J. Skerlos, “Performance of Supercritical Carbon Dioxide Sprays as Coolants and Lubricants in Representative Metalworking Operations,” Journal of Materials Processing Technology, in press, 2012.
Y.-S. Han, S. P. Hyun, H. Y. Jeong, and K.F. Hayes, “Kinetic study of cis-dichloroethylene (cis-DCE) and vinylchloride (VC) dechlorination using green rusts formed under varying conditions,” Water Research, in press, 2012.
S.P. Hyun, J.A. Davis, K. Sun, and K.F. Hayes, “U(VI) reduction by iron(II) monosulfide mackinawite,” Environmental Science and Technology, 46, 3369-3376, 2012.
G. Upadhyaya, T. M. Clancy, J. Brown, K.V. Snyder, K. F. Hayes, and L. Raskin, “Effect of Air-Assisted Backwashing on the Performance of an Anaerobic Fixed-bed Bioreactor that Simultaneously Removes Nitrate and Arsenic from Drinking Water Sources,” Water Research, 46(4), 1309-1317, 2012.