低浓度铯铷溶液萃取分离试验研究

摘要

The separation of rubidium and cesium from a kind of solution containing low concentrations of rubidium and cesium with organic extractant t⁃BAMBP was investigated. The influences on rubidium and cesium extraction rate and separation coefficient by factors, including concentration of OH-, concentration of t⁃BAMBP in xylene, O/A and extraction time, were examined. Results showed that with the concentration of OH- at 0.1 mol/L, the concentration of t⁃BAMBP at 0.7 mol/L, O/A of 0.7 and the extraction time of 1 min, the cesium extraction rate reached 84.43% with the separation coefficient at 7.26, showing a good separation result obtained.%以二甲苯作稀释剂，采用有机萃取剂t⁃BAMBP萃取分离低浓度铯铷溶液中的铯、铷。考察了OH－浓度、萃取剂浓度、萃取相比和萃取时间对铯和铷萃取率及分离系数的影响。结果表明：在c（OH－）＝0．1 mol／L，c（t⁃BAMBP）＝0．7 mol／L，萃取相比为0．7，萃取时间为1 min时，铯萃取率达到84．43％，铯铷分离系数达到7．26，分离效果较好。