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一、引言从放射性防护卫生上看,含鈾的废液是不允許排入下水道的。因而,随着鈾工艺研究工作的开展需要解决含鈾废液的处理問題。从合鈾的废液中除去鈾,有很多方法,例如,有机溶剂萃取法、离子交換法以及載带沉淀法,或者是他們之間的相互結合的方法。我們选择了載带沉淀法。因为虽然有机溶剂萃取法处理过程比較迅速,一些萃取剂对鈾的选择性很高,但是,在用TBP作溶剂从含有CO_3~=,SO_4~=和PO_4~(3-)的溶液中萃取鈾时,就会使鈾的萃取效率降低。虽然离子交換法有操作簡便和可以連續操作等优点,但是,在体系中阴、阳离子較多的情况下对鈾的吸附也会显著的下降。因而,我們选择了載带沉淀法。
I. INTRODUCTION From the point of view of radiological protection and sanitation, waste liquid containing uranium is not allowed to drain into the sewer. Therefore, with the development of uranium process research needs to address the treatment of uranium-containing waste. There are many ways to remove uranium from spent uranium, such as organic solvent extraction, ion exchange and carrier strip deposition, or a combination of these. We chose to carry the precipitation method. Because organic solvent extraction processes more rapidly and some of them have high selectivity to uranium, extraction of uranium from solutions containing CO_3 ~, SO_4 ~ = and PO_4 ~ (3-) using TBP as a solvent , Uranium extraction efficiency will be reduced. Although the ion exchange method has the advantages of simple operation and continuous operation, the adsorption of uranium in the system with a large amount of anion and cation also remarkably decreases. Therefore, we have chosen the carrier precipitation method.