Long-term radiotoxicity of nuclear waste produced during spent nuclear fuel
reprocessing could be reduced if the minor actinides (neptunium, americium
and curium) contained within the waste are separated into short-lived radi
onuclides for their subsequent transmutation or for separate storage. Cross
-linked phenolic resins based on different substituted phenol were shown to
be very efficient for selective uptake of Eu3+ from aqueous solutions cont
aining equal amounts of La3+. In this work, we have prepared and characteri
zed cross-linked phenol based resins to investigate the uptake of Am-243. A
ccording to the results obtained for Eu selective extraction and to enhance
Am-243 sorption, the resins are transformed into their Na+-forms before ex
traction. The ion selectivities of the cross-linked phenol based resins are
then compared as a function of the identity of the ion-exchange phenolic m
atrix. Radiation stability of the resins was studied and each resin was mea
sured for the effect of ionizing radiations with FTIR spectroscopy, moistur
e regain and ion exchange capacity.