News & Events
Chemistry Weekly Seminar - Dr. Andrew Grosvenor
Posted on 2017-09-01 in Events
Sep 15, 2017
Title :Shining a Light on Nuclear Materials
A focus of the Grosvenor Group is to increase our understanding of nuclear materials by use of X-ray-based techniques. During the first part of this talk, our on-going collaboration with AREVA Resources Canada to study how the tailings (solid waste) from the uranium mill located at McClean Lake, Saskatchewan change over time will be discussed. Uranium ore bodies contain many mineral phases beside uranium oxide that need to be disposed of in a responsible fashion. Solid mining waste can be placed in a tailings management facility (TMF), which is designed to contain the waste elements and limit interaction with the external environment. To understand how a tailings facility will behave throughout the lifetime of the mining operations that feed the tailings management facility, and after the site has been decommissioned, it is important to understand the chemistry of the tailings and how they change with time. This part of the talk will focus on our use of X-ray microprobe and X-ray absorption spectroscopy to identify the Ca-bearing minerals in the TMF. During the second portion of the talk, our studies of crystalline metal-oxides and glass-ceramic composite materials as potential nuclear wasteforms will be presented. One aspect of using crystalline metal oxides for the sequestration of nuclear waste elements that must be understood is how the decay of radioactive elements affects the structure of the material. The influence of radiation on a crystalline structure can be simulated by high-energy, ion implantation. We have successfully used surface sensitive glancing-angle X-ray absorption near-edge spectroscopy to study the effect of ion implantation on the structure of pyrochlore-type oxides, monazite- and xenotime-type rare-earth phosphates, and glass-ceramic composites. During the final phase of the talk, our preliminary investigations of how the synthetic method used to form materials for the safe sequestration of nuclear waste elements can affect the structure of these materials will be presented.
Chemistry Seminar - Dr. Sanjai Kumar Pathak
Posted on 2019-06-14
Dr. Sanjai Kumar Pathak, Queens College and Graduate Center of CUNY, New York will present a special seminar.
Chemistry Special Seminar - Dr. Claude Spino
Posted on 2019-05-21
Dr. Claude Spino, Universite de Sherbrooke, will present a special seminar at 11:00 a.m. in Thorvaldson 159.
Chemistry Weekly Seminar - PhD Candidate Vankata Garapati
Posted on 2019-04-18
Venkata Garapati, PhD Candidate, will present a seminar at 10:30 a.m. in Thorvaldson 159.
Chemistry Weekly Seminar - Dr. Rob Britton
Posted on 2019-03-14
Dr. Robert Britton, Department of Chemistry, Simon Fraser University, will present a seminar at 4:00 pm in Thorvaldson 110.
Special Seminar - Dr. Darren Derksen
Posted on 2019-03-06
Dr. Darren Derksen will present a Special Seminar at 11:30 am in Geology 261
Special Seminar - Dr. Amy Stevens
Posted on 2019-02-08
Dr. Amy Stevens, Department of Chemistry, will present a seminar