Application of Calixarenes as Macrocyclic Ligands for Uranium(VI): A Review

Table 6

Successive extractions of Pu(IV) and U(VI) by 21 (extraction (%) at each step).

	First step; pH 2.0	Second step; pH 5.0	Reference
Pu(IV) extraction (%)^a	93	8	[62]
U(VI) extraction (%)^a	0	99	[62]

^aOrganic solvent: 1,2,3,4-tetrahydronaphthalene.