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Characterization and application of 2-(4-chlorophenyl)- 8, 9-dihydro-7Hpyrazolo [1,5-a] quinazolin-6-one in solvent extraction of uranium(VI)

G.M.Hussein, A.M.A.Morsy

In the present study, the use of 2-(4-chlorophenyl)- 8,9-dihydro-7H-pyrazolo [1,5-a] quinazolin-6-one (CPDHPQ) as ligand was evaluated in the liquidliquid (Water carbon tetrachloride) extraction of U(VI). Experiments were carried out to determine the factors affecting uranium extraction; These controlling factors include pH, initial uranium concentration, contact time, organic concentrations and O/A Ratio for maximumextraction for uranium metal ion by ligand, as well as extraction kinetics. The results revealed that the extraction of metal ions is dependent on the pH; maximum extraction was obtained in the pH at 2.5; the ligand CPDHPQ was effective for the extraction ofU(VI).