Removal of cesium by countercurrent solvent extraction with a calix[4]crown derivative |
| |
| Authors: | Anyun Zhang Qihui Hu |
| |
| Affiliation: | College of Chemical and Biological Engineering, University, Hangzhou, P. R. China |
| |
| Abstract: | A macrocyclic 1,3-di(1-dodecyloxy)-2,4-crown-6-calix4]arene (DodCalix4]C6) was synthesized and characterized. The extraction of Cs(I) and more than 10 typical metals with DodCalix4]C6/octanol in HNO3 medium was investigated. DodCalix4]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 DodCalix4]C6/octanol through multistage countercurrent extraction was achieved. |
| |
| Keywords: | Calix[4]crown cesium countercurrent extraction preparation separation |
|
|
