Characterization of Tc-99 Speciation and Chemical Composition of 241-AN-102 Tank Waste Supernatant - 19201

摘要

Technetium (Tc) in its isotopic form ~(99)Tc is generated in high yields from the fission of ~(235)U and ~(239)Pu. A significant inventory of ~(99)Tc remains at the U.S. Department of Energy's Hanford Site, and it is one of the most difficult contaminants to address. In the strongly alkaline solutions that are typical of Hanford tank waste, Tc exists as both pertechnetate (TcO_4~- in oxidation state VII) and in reduced forms (oxidation state