Americium from high-level wastes, removal

Removal of Americium and Curium from High-Level Wastes... 

Bond, W.D., and R.E. Leuze, 1980, Removal of americium and curium from high-level wastes, in Actinide Separations, ACS Symposium Series, Vol. 117, eds J.D. Navratil and W.W. Schulz (American Chemical Society, Washington, DC) p. 441. 

Siddall investigated the ability of these compounds to extract Am(III), Ce(III), Pm(III), and HN03 from 0.1 to 12M HN03 solutions. His favorable results led him to suggest such bidentate extractants could be used to remove trivalent actinides from high-level TBP extraction process waste. This idea was later patented (5). Schulz demonstrated in 1973 that DHDECMP was an effective extractant for americium and plutonium from radioactive Hanford generated wastes (6). 

Muscatello et al. (117) discuss the use of hollow fiber ILMs containing blfunctlonal organophosphorus extractants to remove americium and plutcnlum from nltrate-nltrlc acid waste streams. A reduction In the actinide concentration In a waste stream would allow disposal of the stream as a low-level waste. Partial neutralization of the nitric acid In the waste stream was necessary to obtain high (>9M9) removal of the Am(III). 

There are many examples of the studies on SLM for nuclear applications in the literature. SLMs were tested for high-level radioactive waste treatment combined with removal of actinides and other fission products from the effluents from nuclear fuel reprocessing plants. The recovery of the species, such as uranium, plutonium, thorium, americium, cerium, europium, strontium, and cesium, was investigated in vari-ons extracting-stripping systems. Selective permeation... 

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