Separation of uranium from thorium on cryptomelane-type hydrous manganese dioxide期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Separation of uranium from thorium on cryptomelane-type hydrous manganese dioxide

Authors:	M. A. El Absy I. M. El Naggar M. M. Abdel Hamid H. F. Aly

Affiliation:	(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)

Abstract:	The distribution of UO₂²⁺ 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, UO₂²⁺ and Th⁴⁺. It is found that Th⁴⁺ is more strongly adsorbed on CRYMO than UO₂²⁺ 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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