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Van Tuyl Lecture: Chen Zhu, Indiana University
March 15, 2018 @ 4:00 pm - 5:00 pm
Chen Zhu, Indiana University
Van Tuyl Lecture, BE 241, 4 PM
Topic: “Novel Applications of Non-traditional Stable Isotopes to Geochemical Kinetics”
Abstract: Modeling water-rock reactions in geological carbon sequestration, hydrothermal ore deposit formation, geothermal energy extraction, and disposal of nuclear waste all require the knowledge of kinetic parameters and rate equations. Yet, critical experimental data near-equilibrium are lacking and the applicability of rate equations is untested. We used multi-collector ICP-MS analysis of non-traditional stable isotopes, and a “Si isotope doping method” to measure silicate reaction rates near neutral pH and close to equilibrium conditions. These new data allow us to test the applicability of the Principle of Detailed Balance (PDB) and rate equations derived from PDB. Coupled reactive transport modeling using different rate equations produced very different modeling outcomes for geological carbon sequestration, underscoring the significance of our undertaking. Our innovative approach promises to generate critical new kinetic data and rate equations that will help produce more realistic modeling results.
Chen Zhu is a Professor of Earth and Atmospheric Sciences and adjunct professor of Environmental Sciences and Public Health at Indiana University. He holds a Ph.D. from The Johns Hopkins University, an MSc from the University of Toronto, a BS from the Chengdu University of Technology, and a postdoctoral fellowship at the Woods Hole Oceanographic Institution.
Zhu is a fellow of American Association for the Advancement of Science, Mineralogical Society of America, and Geological Society of America. He is also a Fulbright Scholar, and the 2006 recipient of the John Hem Award from the National Ground Water Association in recognition of his significant contributions in modeling the chemical evolution of water.
Zhu is an Associate Editor for Geochimica et Cosmochimica Acta since 2005, and has co-authored with Greg Anderson the textbook “Environmental Applications of Geochemical Modeling”, published by Cambridge University Press.