Separation of uranium from thorium on cryptomelane-type hydrous manganese dioxide |
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| Authors: | M A El Absy I M El Naggar M M Abdel Hamid H F Aly |
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| Institution: | (1) Radioisotope Production and Labelled Compounds Department, Atomic Energy Establishment, P.O. Code 13759, Cairo, (Egypt);(2) Nuclear Chemistry Department, Nuclear Research Centre, Atomic Energy Establishment, P.O. Code 13759, Cairo, (Egypt);(3) Hot Laboratory Centre, Atomic Energy Establishment, P.O. Code 13759, Cairo, (Egypt) |
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| Abstract: | The distribution of UO
2
2+
and Th4+ in nitric acid media on crypomelane-type hydrous manganese dioxide (CRYMO) has been investigated by batch equilibrations and column break-through techniques. The parameters studied involve the media composition and concentrations of HNO3, NaNO3, UO
2
2+
and Th4+. It is found that Th4+ is more strongly adsorbed on CRYMO than UO
2
2+
with sufficient differences for chromatographic separation from each other. Uranium was quantitatively eluted from a CRYMO column with 0.1M HNO3. Th4+ has been recovered by using  1M HNO3 as eluent. |
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