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Interfacial Reactivity in Geochemical Systems
Fri, Sep 17, 2004 @ 02:30 PM - 04:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
THE DEPARTMENT OF MATERIALS SCIENCE & ENGINEERING PRESENTS A SEMINARbyProfessor James R. Rustad W.M. Keck Center for Active Visualization in the Earth Sciences University of California - DavisSPEAKING ONInterfacial Reactivity in Geochemical Systems ABSTRACT Acid base reactions occurring on mineral surfaces govern the fate and transport of contaminants in geochemical environments through their influence on sorption, redox, and ligand exchange reactions. During the last decade, geochemists have attempted to understand these reactions using site binding models incorporating crystallographic influences on site heterogeneity. We have used computational methods to explore the influence of site heterogeneity on chemical reactivity at multiple scales.
We find important influences persist up to length scales of 10's of
nanometers, making it almost impossible to predict the behavior of an interfacial system through knowledge of, for example, its crystal structure and crystal habit alone. Examples are drawn from experiment and theory on ligand exchange, redox and acid base reactions.**ALL FIRST-YEAR MATERIALS SCIENCE GRADUATE STUDENTS ARE REQUIRED TO ATTEND**
Location: Vivian Hall of Engineering (VHE) - 217
Audiences: Everyone Is Invited
Contact: Petra Pearce
