Kilogram-scale purification of americium by ion exchange Page: 4 of 21
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I Sequential anion and cation exchange processes have been used
for the final purification of Am recovered during the reprocessing
of aged plutonium metallurgical scrap. Plutonium was removed by absorp-
tion on Dowex 1 , X-3.5 (30-50'mesh) anion exchange resin from 6.5-7.5 M
HNOg feed solution. Following a water dilution to 0.75-1.0 M.HNO^,
americium was absorbed on Dowex 50W, X-8 (50-100 mesh) cation exchange
resion. Final purification was accomplished by elution of the absorbed
band down 3 to 4 successive beds of the same resin, preloaded with Zn ,
with an NH^OH buffered chelating agent.
The recovery of mixed Am- Am from power reactor reprocessing
waste has been demonstrated. Solvent extraction was used to recover a
HNOg solution of mixed lanthanides and actinides from waste generated
by the reprocessing of 13.5 tons of Shippingport Power Reactor blanket
fuel. Sequential cation exchange band-displacement processes were
then used to separate americium and curium from the lanthanides and
244 241 243
then to separate ^60 g of Cm from 1000 g of mixed Am- Am.
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Wheelwright, E. J. Kilogram-scale purification of americium by ion exchange, article, January 1, 1979; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1063914/m1/4/: accessed February 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.