Separation of carrier-free 90Y from high level waste by extraction chromatographic technique using 2-ethylhexyl-2-ethylhexyl phosphonic acid (KSM-17)

被引:26
|
作者
Achuthan, PV [1 ]
Dhami, PS [1 ]
Kannan, R [1 ]
Gopalakrishnan, V [1 ]
Ramanujam, A [1 ]
机构
[1] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India
关键词
D O I
10.1081/SS-100100155
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An extraction chromatographic technique has been developed for the separation of carrier-free Y-90 from the Sr-90 present in the high level waste (HLW) of the Purex process. When a Purex HLW solution in 2-3 M HNO3 is passed through a CMPO-Chromosorb-102 (CAC) column, all the trivalent, tetravalent, and hexavalent ions are sorbed. The effluent from this experiment, after adjusting the pH to 2 with NaOH, was passed through a 2-ethylhexyl-2-ethylhexyl phosphonic acid (KSM-17)-Chromosorb-102 (KSMC) extraction chromatographic column where only Y-90 was sorbed. All the other ions (Sr-90, Cs-137, Sb-125, Ru-106, Rh-106, etc.) were washed off with dilute HNO3 (pH 2), and carrier-free Y-90 was eluted with 0.5 M HNO3. This technique can yield Y-90 in mCi levels in pure form for medical applications. The Sr-90 can be used repeatedly after allowing for Y-90 buildup.
引用
收藏
页码:261 / 270
页数:10
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