Kinetics of americium and europium extraction by tert-butylthiacalix[4]arene from alkaline media

Kinetics of 152 Eu and 241 Am extraction by nitrogen-bearing alkyl amino phenol oligomer YaRB and tert -butylthiacalix[4]arene TCA from carbonate-alkaline media was studied. Both extractants efficiently extract americium and europium in pH interval 12–14. The maximum of americium extraction is located at the lower values of pH, compared with europium. YaRB extracts americium and europium faster than TCA, and at the same time, americium is extracted faster than europium by both extractants. In general, thiacalixarene TCA is regarded as more efficient extractant than alkyl amino phenol oligomer YaRB.