Distribution coefficients of lanthanide elements and some separations on layered hydrous titanium dioxide
Abstract
Distribution coefficients /Kd/ of lanthanide elements on layered hydrous titanium dioxide, H2Ti4O9.nH2O /where n=1.2–1.3/, have been determined as a function of the pH of the aqueous phase. The plots of 1g Kd vs. pH gave straight lines with slopes equal to +3 except for the data for heavier lanthanides, suggesting ideal ion-exchange equilibria between tervalent cations in the aqueous phase and hydrogen ions in the hydrous oxide. Mutual separations of La‑Cs and La‑Ba have been achieved on a column of this material on the basis of large differences in affinities between the metal ion pairs.
- Publication:
-
Journal of Radioanalytical and Nuclear Chemistry
- Pub Date:
- November 1986
- DOI:
- 10.1007/BF02163446
- Bibcode:
- 1986JRNC..107..111S
- Keywords:
-
- Oxide;
- Hydrogen;
- Titanium;
- Physical Chemistry;
- Dioxide