N, N, N′, N′-tetra(2-ethylhexyl) thiodiglycolamide T(2EH)TDGA: A novel ligand for the extraction of palladium from high level liquid waste (HLLW)
-
R. Ruhela
Abstract
A novel neutral multidentate ligand N, N, N′, N′-tetra(2-ethylhexyl) thiodiglycolamide T(2EH)TDGA was synthesized and examined for the extraction of palladium from nitric acid medium. Extraction equilibrium studies showed that almost complete extraction of palladium was obtained within 5 min. The influence of nitric acid, nitrate ion and T(2EH)TDGA concentration on the distribution of palladium has been investigated. With the increase in nitric acid/nitrate ion concentration, increase in extraction of palladium was observed. Stoichiometry of the extracted species was found to be Pd(NO3)2·2T(2EH)TDGA by slope analysis method. Loading studies with 10−3 M T(2EH)TDGA/n-dodecane show maximum uptake of 5.44×10−4 M palladium thus conforming to above stoichiometry of metal to ligand. Acid uptake studies have shown that 1:1 stoichiometry exists between T(2EH)TDGA and HNO3 at nitric acid concentration above 3.5 M. The effect of various diluents on the extraction of palladium was studied and it was found that there is quantitative uptake irrespective of the nature of diluents. More than 99% of palladium was back extracted in single contact using 0.01 M thiourea in 0.1 M nitric acid. Extraction studies with HLLW elements showed negligible uptake of U, Am, Eu, Sr, Cs and Ru.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Articles in the same Issue
- Measurement of excitation functions for production of cerium radioisotopes by deuteron induced reactions on natural cerium for nanobioscience applications
- Demonstration of the LUCA process for the separation of americium(III) from curium(III), californium(III), and lanthanides(III) in acidic solution using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tris(2-ethylhexyl)phosphate
- Anodic stripping voltammetric determination of uranium at a thin palladium film-aluminum electrode: Analysis of some uranium mineral ores
- N, N, N′, N′-tetra(2-ethylhexyl) thiodiglycolamide T(2EH)TDGA: A novel ligand for the extraction of palladium from high level liquid waste (HLLW)
- Sorption kinetics of cesium on ZrO2 and ZrO2-SiO2-TiO2 microspheres
- Comparison of two sequential extraction protocols for fractionation of natural radionuclides in soil samples
- Activity release from the damaged spent VVER-fuel during long-term wet storage
- Biological studies of samarium-153 bleomycin complex in human breast cancer murine xenografts for therapeutic applications
- Effects of gamma radiation on electrochemical properties of ionic liquids
Articles in the same Issue
- Measurement of excitation functions for production of cerium radioisotopes by deuteron induced reactions on natural cerium for nanobioscience applications
- Demonstration of the LUCA process for the separation of americium(III) from curium(III), californium(III), and lanthanides(III) in acidic solution using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tris(2-ethylhexyl)phosphate
- Anodic stripping voltammetric determination of uranium at a thin palladium film-aluminum electrode: Analysis of some uranium mineral ores
- N, N, N′, N′-tetra(2-ethylhexyl) thiodiglycolamide T(2EH)TDGA: A novel ligand for the extraction of palladium from high level liquid waste (HLLW)
- Sorption kinetics of cesium on ZrO2 and ZrO2-SiO2-TiO2 microspheres
- Comparison of two sequential extraction protocols for fractionation of natural radionuclides in soil samples
- Activity release from the damaged spent VVER-fuel during long-term wet storage
- Biological studies of samarium-153 bleomycin complex in human breast cancer murine xenografts for therapeutic applications
- Effects of gamma radiation on electrochemical properties of ionic liquids
