Removal of Technetium, Carbon Tetrachloride, and Metals from DOE Properties.

[摘要] The objective of this research is to prepare, characterize, and evaluate new materials for the removal of technetium (Tc) compounds, halogenated organics, and other troublesome metals from DOE waste streams and contaminated areas. This work follows the discovery that a nanoscale form of zero-valent iron, dispersed on high surface area supports, reduces metal ions (Cr, Hg, Pb, Cd) and Re (as a surrogate for Tc) to insoluble forms faster and with higher efficiency than does unsupported iron. Liquid-liquid extraction methods are also being developed for quantitative removal of Cs from tetraphenylborate salt mixtures, which are generated in waste processing at Savannah River, and conversion to vitrifiable inorganic Cs salts.

[发布日期] 2000-06-01 [发布机构] Penn State University, University Park, PA

[关键词] Removal;Carbon Tetrachloride;54 Environmental Sciences;37 Inorganic, Organic, Physical And Analytical Chemistry;Wastes