TPE and RE Extraction during Long-lived Radionuclide Partitioning in Combination with PUREX-process Using a Single TBP-Based Solvent

Highly selective separation of tetravalent plutonium from complex system with novel phenylpyridine diamide ligands

“…19–23 Among them, solvent extraction has gained prominence owing to its inherent benefits such as continuous operation, adaptability, radiation stability, and solvent reusability. Several extractants have been utilized, such as tri- n -butyl phosphate, 24 trialkyl phosphine oxide, 25,26 octyl-(phenyl) N , N -diisobutyl carbamoyl methyl phosphine oxide, 27–29 and di-iso-decylphosphoric acid. 30 However, the use of phosphorus-containing ligands defies the “CHON” principle, which refers to extractants containing only carbon, hydrogen, oxygen, and nitrogen atoms, and poses serious environmental challenges by generating harmful solid residues.…”