Evaluation of selectivity and radiolysis behavior of some promising isonicotinamids and dipicolinamides as extractants
-
E. A. Mowafy
A series of long chain isonicotinamides (pyridine-4-carboxamides) and dipicolinamides (pyridine-2,6-dicarboxamides) have been prepared with different substituting groups and the extracting ability for Fe(III), Am(III), Eu(III), Sr(II), Co(II) and Cs(I) from nitric acid solutions has been studied. Distribution ratios of Fe(III) as function of nitric acid concentration, extractants concentration and salting-out agent have been measured by using N,N′-dioctylisonicotinamide (DOINA) and N,N,N′,N′-tetraoctyldipicolinamide (TODPA) which were chosen for further studies. Irradiation of DOINA and TOBPA by different gamma doses showed a different extraction behavior for Fe(III). The radiolytic degradation of the investigated amides has been estimated by quantitive IR spectroscopy. The results indicated that the radiolytic stability is influenced by the structure of the investigated amides. Symmetrical isonicotinamides or dipicolinamide seems to be less affected by radiation compared with unsymmetrical isonicotiniamides or dipicolinamides. The extraction of iron from aqueous solutions with the investigated extractants is fast. Separation of iron(III) based on kinetic basis was carried out.
© Oldenbourg Wissenschaftsverlag
Artikel in diesem Heft
- Cation–cation interaction in crystal structures of Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine, [NpO2(C10H8N2)(OOCC6H5)]2 and [PuO2(C10H8N2)(OOCC6H5)]2
- Effect of humic acid on sorption of neptunium on hematite colloids
- Kinetics and thermodynamics of uranium(VI) sorption on hydrous silica
- Spent fuel UO2 matrix alteration in aqueous media under oxidizing conditions
- Solubility study of Tc(IV) in a granitic water
- Empore™ strontium rad disks: validation procedure for strontium-90 analysis in radioactive wastes
- Extraction of medically interesting 188Re-perrhenate in methyl ethyl ketone for concentration purposes
- Evaluation of selectivity and radiolysis behavior of some promising isonicotinamids and dipicolinamides as extractants
- New data on transuranium elements in the ecosystem of the Yenisei river floodplain
Artikel in diesem Heft
- Cation–cation interaction in crystal structures of Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine, [NpO2(C10H8N2)(OOCC6H5)]2 and [PuO2(C10H8N2)(OOCC6H5)]2
- Effect of humic acid on sorption of neptunium on hematite colloids
- Kinetics and thermodynamics of uranium(VI) sorption on hydrous silica
- Spent fuel UO2 matrix alteration in aqueous media under oxidizing conditions
- Solubility study of Tc(IV) in a granitic water
- Empore™ strontium rad disks: validation procedure for strontium-90 analysis in radioactive wastes
- Extraction of medically interesting 188Re-perrhenate in methyl ethyl ketone for concentration purposes
- Evaluation of selectivity and radiolysis behavior of some promising isonicotinamids and dipicolinamides as extractants
- New data on transuranium elements in the ecosystem of the Yenisei river floodplain
