Szczegóły publikacji
Opis bibliograficzny
Immobilization of uranium from aqueous solutions by room-temperature precipitation of pyromorphite [$Pb_{5}(PO_{4})_{3}Cl$] / Julia SORDYL, Carmen E. Chamberlain, Teagan F. M. Sweet, Peter C. Burns, Karl Cronberger, Maciej MANECKI // Polyhedron ; ISSN 0277-5387. — 2024 — vol. 252 art. no. 116891, s. 1–8. — Bibliogr. s. 7–8, Abstr. — Publikacja dostępna online od: 2024-02-14. — J. Sordyl - dod. afiliacja: Uppsala University, Sweden
Autorzy (6)
- AGHSordyl Julia
- Chamberlain Carmen
- Sweet Teagan
- Burns Peter C.
- Cronberger Karl
- AGHManecki Maciej
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 152404 |
|---|---|
| Data dodania do BaDAP | 2024-04-17 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.poly.2024.116891 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Polyhedron |
Abstract
U(VI) in natural pyromorphite reaches 0.5 wt%. However, this depends on concentration of U in source solutions and the upper limit of incorporation of uranyl into pyromorphite at low temperature is unknown. If U(VI) incorporation capacity in the structure is high enough, Pb-apatite could be used in radioactive waste remediation. In this study, eight compounds were synthesized from aqueous solutions containing Pb2+, (UO2)2+, (PO4)3- and Cl- ions in a still water column under ambient conditions. In each synthesis, the molar ratio of (UO2)2+:Pb was varied, targeting composition Pb5-x(UO2)x(PO4)3Cl. The final solutions were analyzed with inductively coupled plasma optical emission spectroscopy (ICP-OES) for Pb and U(VI) concentrations, while dried solids were analyzed using powder X-ray diffraction (PXRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), wavelength dispersive X-ray spectroscopy (WDS) using an electron microprobe, and Raman spectroscopy. Synthesis products are synthetic analogs of pyromorphite containing (UO2)2+, partially substituting Pb2+. For the higher initial concentration of U, coprecipitation of a second phase/phases was observed. U was removed from the solution at levels ranging from 74.3 % (σ = 1.5) to 88 % (σ = 2), and Pb was removed at levels ranging from 91 % (σ = 2) to 96.8 % (σ = 1.9). Precipitation of pyromorphite from uranyl-contaminated solutions may immobilize uranyl in the form of highly insoluble, stable, crystalline Pb phosphates.
