TY - JOUR
T1 - Evaluation of several multiple diglycolamide-functionalized calix[4]arene ligands for the isolation of carrier free 90Y from 90Sr
AU - Mohapatra, P.K.
AU - Raut, D.R.
AU - Iqbal, M.
AU - Huskens, Jurriaan
AU - Verboom, Willem
PY - 2014
Y1 - 2014
N2 - Several diglycolamide-functionalized calix[4]arenes containing four and eight diglycolamide (DGA) moieties were evaluated for their relative extraction efficiencies towards Y(III) and Sr(II). Ligands containing four DGA units with n-propyl, iso-pentyl, and n-octyl groups at the amidic N atom adjacent to the calix[4]arene skeleton showed efficient extraction of Y(III) from 3 M HNO3. The extraction of Sr(II) was poor in all cases in the entire acidity range (0.1–6 M HNO3) studied. The ligands with a hydrogen atom and an n-propyl group at the concerning amidic N atom showed a very high separation efficiency as reflected in separation factor (S.F.=DY/DSr) values in the range of 105–106. A method was developed for the separation of carrier-free 90Y from a 90Y-90Sr mixture involving consecutive extraction–stripping cycles. The product purity was checked using half-life measurements. Two consecutive cycles of extraction and stripping were found to be sufficient for obtaining pure 90Y. The results obtained in the present studies were compared with those obtained previously using analogous ligands such as TODGA (N,N,N',N'-tetraoctyl diglycolamide), T2EHDGA (N,N,N',N'-tetra-2-ethylhexyl diglycolamide), and PC-88A (bis(2-ethylhexyl) phosphonic acid).
AB - Several diglycolamide-functionalized calix[4]arenes containing four and eight diglycolamide (DGA) moieties were evaluated for their relative extraction efficiencies towards Y(III) and Sr(II). Ligands containing four DGA units with n-propyl, iso-pentyl, and n-octyl groups at the amidic N atom adjacent to the calix[4]arene skeleton showed efficient extraction of Y(III) from 3 M HNO3. The extraction of Sr(II) was poor in all cases in the entire acidity range (0.1–6 M HNO3) studied. The ligands with a hydrogen atom and an n-propyl group at the concerning amidic N atom showed a very high separation efficiency as reflected in separation factor (S.F.=DY/DSr) values in the range of 105–106. A method was developed for the separation of carrier-free 90Y from a 90Y-90Sr mixture involving consecutive extraction–stripping cycles. The product purity was checked using half-life measurements. Two consecutive cycles of extraction and stripping were found to be sufficient for obtaining pure 90Y. The results obtained in the present studies were compared with those obtained previously using analogous ligands such as TODGA (N,N,N',N'-tetraoctyl diglycolamide), T2EHDGA (N,N,N',N'-tetra-2-ethylhexyl diglycolamide), and PC-88A (bis(2-ethylhexyl) phosphonic acid).
KW - IR-95103
KW - METIS-308513
U2 - 10.1016/j.apradiso.2013.12.010
DO - 10.1016/j.apradiso.2013.12.010
M3 - Article
SN - 0969-8043
VL - 85
SP - 133
EP - 138
JO - Applied radiation and isotopes
JF - Applied radiation and isotopes
ER -