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- Title
Dissolution of Tc(IV) in the presence of polyamino polycarboxylate ligands.
- Authors
Omoto, Trevor; Wall, Nathalie A.
- Abstract
The dissolution of Tc(IV), in the form of TcOOH+, in the presence of four different polyamino polycarboxylate (PAPC) ligands was quantified over 89 days. These experimentally determined Tc(IV) solubilities in PAPC ligand solutions were compared to predicted solubilities previously calculated by this group. The PAPC ligands selected for this study were iminodiacetic acid (IDA), nitrilotriacetic acid (NTA), and hydroxyethylethylenediaminetriacetic acid (HEDTA). The presence of each of the PAPC significantly increases Tc(IV) solubility. The solubilities of Tc(IV) after 89 days is 3.4 ± 0.1 µM, 3.9 ± 0.3 µM, and 8.3 ± 0.9 µM in the presence of 10 mM of IDA, NTA, and HEDTA, respectively, and at solutions of ionic strength 0.5 M (NaCl) and pH 2.3. The solubilities agrees with predictive values for IDA, NTA, and HEDTA. The solubility of Tc(IV) in the absence of ligand in solutions of ionic strength 0.5 M (NaCl) and pH 2.3 is 0.7 ± 0.7 µM after 89 days.
- Subjects
IONIC solutions; NITRILOTRIACETIC acid; IONIC strength; LIGANDS (Chemistry); SOLUBILITY
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 12, p5525
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08640-3