SREX - A NEW PROCESS FOR THE EXTRACTION AND RECOVERY OF STRONTIUM FROM ACIDIC NUCLEAR WASTE STREAMS
SREX - A NEW PROCESS FOR THE EXTRACTION AND RECOVERY OF STRONTIUM FROM ACIDIC NUCLEAR WASTE STREAMS
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DOI：
10.1080/07366299108918039
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发表时间：
1991-01-01
影响因子：
2
通讯作者：
FISHER, DE
中科院分区：
文献类型：
--
作者：
HORWITZ, EP;DIETZ, ML;FISHER, DE
介绍了一种从酸性废液中提取和回收锶的新工艺。 在这个过程中，被称为SREX（用于锶提取），使用0.20 M的二叔丁基环己基-18-冠-6的1-辛醇溶液从酸性（大于或等于1 M HNO 3）溶液中提取锶。 使用水或稀（< 0.05 M）HNO 3容易地从有机相中汽提萃取的锶。 在合成的溶解污泥废液上进行的工艺试验表明，只有锶、钡和锝被冠醚略微萃取。 工艺溶剂在高温下长时间暴露于硝酸或暴露于来自Co-60源的小于或等于50 Wh/L的γ辐射基本上不会使其性能劣化。 实验室间歇逆流萃取实验表明，99.7%的锶最初存在于进料溶液中，可以被删除，只有三个萃取阶段。
A new process for the extraction and recovery of strontium from acidic waste streams is described. In this process, called SREX (for Strontium Extraction), strontium is extracted from acidic (greater-than-or-equal-to 1 M HNO3) solution using a 0.20 M solution of di-t-butylcyclohexano-18-crown-6 in 1-octanol. Extracted strontium is readily stripped from the organic phase using either water or dilute (< 0.05 M) HNO3. Tests of the process on a synthetic dissolved sludge waste solution show that only strontium, barium, and technetium are appreciably extracted by the crown ether. Prolonged exposure of the process solvent to nitric acid at elevated temperatures or to less-than-or-equal-to 50 Wh/L gamma radiation from a Co-60 source produces essentially no deterioration in its performance. Benchtop batch countercurrent extraction experiments show that 99.7% of the strontium initially present in a feed solution can be removed in only three extraction stages.