Palladium(II) recovery in extraction and sorption systems with 5-amino-1,2,4-thiadiazole derivatives

The distribution of palladium(II) between the solutions of hydrochloric and nitric acids and the solutions of 5-amino-1,2,4-thiadiazole derivatives in 1,2-dichloroethane depending on acid and extractant concentrations in the aqueous and organic phases, respectively, was studied. The stoichiometry of the extracted complexes was determined, and the concentration constants of extraction were calculated. The applicability of macroporous polymer sorbents noncovalently modified with the test reagents to the sorption recovery of palladium(II) from nitric acid solutions was demonstrated.