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Highly Selective Recovery of Lanthanides by Using a Layered Vanadate with Acid and Radiation Resistance.
- Source :
- Angewandte Chemie; 1/27/2020, Vol. 132 Issue 5, p1894-1899, 6p
- Publication Year :
- 2020
-
Abstract
- It is of vital importance to capture lanthanides (nuclear fission products) from waste solutions for radionuclide remediation owing to their hazards. The effective separation of lanthanides are achieved by an acid/base‐stable and radiation‐resistant vanadate, namely, [Me2NH2]V3O7 (1). It exhibits high adsorption capacities for lanthanides (qmEu=161.4 mg g−1; qmSm=139.2 mg g−1). And high adsorption capacities are maintained over a pH range of 2.0–6.9 (qmEu=75.1 mg g−1 at low pH of 2.5). It displays high selectivity for Eu3+ (simulant of An3+) against a large excess of interfering ions. It can efficiently separate Eu3+ and Cs+ (or Sr2+) with the highest separation factor SFEu/Cs of 156 (SFEu/Sr of 134) to date. The adsorption mechanism is revealed by calculations and XPS, EXAFS, Raman, and elemental analyses. These merits combined with facile synthesis and convenient elution makes the title vanadate a promising lanthanide scavenger for environmental remediation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 132
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 141384019
- Full Text :
- https://doi.org/10.1002/ange.201912040