Removal of cesium by countercurrent solvent extraction with a calix[4]crown derivative
Removal of cesium by countercurrent solvent extraction with a calix[4]crown derivative
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DOI：
10.1080/01496395.2017.1297456
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发表时间：
2017-02
影响因子：
2.8
通讯作者：
A. Zhang;Qihui Hu
中科院分区：
文献类型：
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作者：
A. Zhang;Qihui Hu
合成并表征了大环1，3-二（1-十二烷氧基）-2，4-冠-6-杯[4]芳烃（DodCalix[4]C6）。研究了在硝酸介质中，DodCalix[4]C6/正辛醇对Cs（I）及10多种典型金属离子的萃取行为。DodCalix[4]C6对Cs（I）具有很强的萃取能力和较高的选择性。Cs（I）萃取的最佳酸度为3.0 M HNO 3。采用五级逆流萃取法从模拟高活性废液中分离铯（I）。五段萃取法对Cs（I）的萃取率大于99%。采用多级逆流萃取技术，实现了DodCalix[4]C6/辛醇对Cs（I）的有效分配。
ABSTRACT A macrocyclic 1,3-di(1-dodecyloxy)-2,4-crown-6-calix[4]arene (DodCalix[4]C6) was synthesized and characterized. The extraction of Cs(I) and more than 10 typical metals with DodCalix[4]C6/octanol in HNO3 medium was investigated. DodCalix[4]C6 exhibited strong extraction ability and high selectivity for Cs(I) over others except for Rb(I). The optimum acidity in Cs(I) extraction was 3.0 M HNO3. The Cs(I) separation from a simulated highly active liquid waste by five-stage countercurrent extraction was performed. The extraction efficiency of Cs(I) for five-stage extraction was greater than 99%. The effective partitioning of Cs(I) by DodCalix[4]C6/octanol through multistage countercurrent extraction was achieved.