Back to Search
Start Over
Temperature Effect On The Extraction Of Am(iii), U(vi), And Sr(ii) By Dialkyl-substituted Alkylenediphosphonic Acids
- Source :
- Separation Science and Technology. 38:2619-2636
- Publication Year :
- 2003
- Publisher :
- Informa UK Limited, 2003.
-
Abstract
- Solvent extraction reagents containing the diphosphonic acid group exhibit extraordinary affinity for tri-, tetra-, and hexavalent actinides. Use of these reagents has been proposed for actinide separation and preconcentration procedures. A new extractant, P,P′-di(2-ethylhexyl) benzene-1,2-diphosphonic acid (H2DEH[1,2-BzDP]), has been synthesized. Its metal extraction characteristics are reported and compared to the previously synthesized P,P′-di(2-ethylhexyl) methylene-(H2DEH[MDP]), ethylene-(H2DEH[EDP]), and butylene-(H2DEH[BuDP]) diphosphonic acids. Different degrees of aggregation and different extraction mechanisms and stoichiometries have been reported for these ligands. In this work, thermodynamic parameters associated with the extraction of selected metal ions by these ligands were measured to provide further insight into the mechanism of the extraction processes involved. Knowledge of the enthalpy, entropy, and free-energy changes, in combination with other fundamental principles governing extrac...
- Subjects :
- biology
Chemistry
Process Chemistry and Technology
General Chemical Engineering
Metal ions in aqueous solution
Inorganic chemistry
Enthalpy
Filtration and Separation
General Chemistry
Actinide
biology.organism_classification
Metal
visual_art
Reagent
visual_art.visual_art_medium
Tetra
Stoichiometry
Entropy (order and disorder)
Subjects
Details
- ISSN :
- 15205754 and 01496395
- Volume :
- 38
- Database :
- OpenAIRE
- Journal :
- Separation Science and Technology
- Accession number :
- edsair.doi...........0e64c36720aa0ffd998be7b0e582a2dc
- Full Text :
- https://doi.org/10.1081/ss-120022563