ABSTRACT
Extractants ........................................................................................ 365 6.3 Extraction of Radionuclides by Mixtures of Different
Neutral Extractants ....................................................................................... 368 6.3.1 Mixture of Different Crown Ethers .................................................. 368 6.3.2 Mixture of Crowns and Calixarenes ................................................ 370 6.3.3 Mixture of Crowns and Neutral Organophosphorus
Compounds ....................................................................................... 372 6.4 Conclusion .................................................................................................... 374 References .............................................................................................................. 375
The disposition of the radioactive waste resulting from spent nuclear-fuel reprocessing is one of the major problems of nuclear technology. Many of these wastes are high-level (HLW) and present a potential environmental hazard. Because of the expense associated with long-term storage, it is desirable to minimize the volume of radioactive waste and store it as material with maximal chemical stability to avoid the dissipation of radionuclides in the environment.
