In the context of nuclear workers monitoring, the aim of this PhD was to selectively isolate U, Pu, and Am from urine to propose a new analytical procedure to the Medical and Biology Analysis Laboratories.
The 1,3,5-OCH3-2,4,6-OCH2CONHOH-p-tert-butylcalixarene molecule has been selected as a promising extractant for U, Pu, and Am. Its physico-chemical properties and its affinity for UO22+ have been studied through two approaches, one theoretical (molecular modelling at DFT level), and one experimental.
The extractions of the three actinides by the hydroxamic calixarene were quantitative in liquid-liquid and solid-liquid systems. Their separation has also been shown possible and efficient.
After optimization, the proposed procedure should allow the laboratories to carry out the chemical treatment of urine, before the measurement, in one day instead of the three days needed nowadays.