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- W4224438418 endingPage "105888" @default.
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- W4224438418 abstract "The extraction of Pd2+ with N,N-dialkyl-2-(3-(pyridine-2-yl)-1H-pyrazole-1-yl) acetamide (A-C-PzPy) and N,N-dialkyl-3-(pyridine-2-yl)-1H-pyrazole-1-carboxamide (A-PzPy) from HNO3 medium, as well as the complexation of Pd2+ with A-C-PzPy were investigated. The use of tert-butyl benzene (TBB) as a diluent for A-C-PzPy offered significantly better extractability toward Pd2+, compared to that of A-PzPy. This study demonstrated strong extractability, high selectivity, high loading capacity, and fast extraction kinetics for DOct-C-PzPy toward Pd2+ from highly acidic HNO3 solution (up to 5.0 mol/L). Slope analysis showed the formation of 1:1 type of extracted species of Pd2+ with DOct-C-PzPy ligand. The extraction was a spontaneous and endothermic process with increased entropy. The analyses of electrospray ionization mass spectrometry (ESI-MS), Fourier transform infrared (FT-IR) and UV–vis spectrophotometric titration revealed that the composition of the extracted neutral complex species was Pd(NO3)2(DOct-C-PzPy). Combining the results of solvent extraction and complexation study, a neutral complexation extraction model is proposed. Furthermore, the stability constants (log β) for the complexation of Pd2+ with A-C-PzPy are also presented." @default.
- W4224438418 created "2022-04-27" @default.
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- W4224438418 date "2022-05-01" @default.
- W4224438418 modified "2023-10-09" @default.
- W4224438418 title "Recovery of palladium(II) from strong nitric acid solutions relevant to high-level liquid waste of PUREX process by solvent extraction with pyrazole-pyridine-based amide ligands" @default.
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- W4224438418 doi "https://doi.org/10.1016/j.hydromet.2022.105888" @default.
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