报告题目：Utilization of speciation and coordination chemistry for separations and radiochemistry

报 告 人：Professor Ken Czerwinski (Department of Chemistry, University of Nevada)

报告时间：2013年11月25日 （星期一）上午9:30

报告地点：嘉定园区学术活动中心307室

报告简介：

K.R. Czerwinski, A. Bhattacharyya, W. Kerlin, E. Johnstone, F. Poineau, P. Weck, P. Forster, T. Hartmann, and A. Sattelberger, Radiochemistry Program, University of Nevada, Las Vegas

Technetium and the actinide elements are intimately linked with nuclear reactions and are central to the nuclear fuel cycle. The use and presence of these elements are directly due to nuclear reactors. While occupying a central location in the periodic table, the chemistry of technetium is poorly explored, especially when compared to its neighboring elements, i.e., molybdenum, ruthenium, and rhenium. This state of affairs, which is tied to the small number of laboratories equipped to work with the long-lived 99Tc isotope, provides a remarkable opportunity to combine basic studies with applications for the nuclear fuel cycle. The actinide elements are in a similar situation, with the ability to advance understanding of 5f electron chemistry possible through experimental studies. For these elements research requires specialized facilities that are often not found in an academic setting.

The radiochemistry program at the University of Nevada, Las Vegas has combined radiochemical facilities with a radiochemistry education mission. This program is described, emphasizing the importance of collaborations in developing research opportunities for students. Research highlighting separations is provided. For fuel cycle separations, studies performed on technetium are described. This work examined the selective removal of technetium from uranium and the subsequent formation of metallic waste forms. The results were applied to studies on used nuclear fuel and demonstrated a route to produce technetium metal. Novel approaches to technetium halide formation, with applications to the fuel cycle, are provided.

报告人简介:

Ken Czerwinski，内华达州立大学化学系教授

Education History

Employment History

研究方向与学术成就:

1.长期从事放射性元素分离与络合化学、燃料循环、以及放射性药物的研究。现阶段研究集中于锕系元素与锝的化学形态与络合化学的研究，通过络合化学与电子结构的解析帮助理解相关元素在分离过程、放射性化合物的合成等方面的问题。

2.在内华达大学化学系建立了放射化学的研究方向。指导超过25位硕士与博士研究生。美国专利3项，超过140篇学术论文。