Szczegóły publikacji
Opis bibliograficzny
Solubility product of vanadinite $Pb_{5}(VO_{4})_{3}Cl$ at $25 ^{\circ}{C}$— a comprehensive approach to incongruent dissolution modeling / Justyna TOPOLSKA, Bartosz PUZIO, Olaf Borkiewicz, Julia SORDYL, Maciej MANECKI // Minerals [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2075-163X. — 2021 — vol. 11 iss. 2 art. no. 135, s. 1-13. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 10-13, Abstr. — Publikacja dostępna online od: 2021-01-29
Autorzy (5)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 132515 |
|---|---|
| Data dodania do BaDAP | 2021-02-10 |
| Tekst źródłowy | URL |
| DOI | 10.3390/min11020135 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Minerals |
Abstract
Although vanadinite (Pb5(VO4)3Cl) occurs in abundance in various terrestrial geochemical systems of natural and anthropogenic origin and is seriously considered as a potential nuclear waste sequestering agent, its actual application is severely limited by a lack of understanding of its basic thermodynamic parameters. In this regard, the greatest challenge is posed by its incongruent dissolution, which is a pivotal hurdle for effective geochemical modeling. Our paper presents an universal approach for geochemical computing of systems undergoing incongruent dissolution which, along with unique, long-term experiments on vanadinites’ stability, allowed us to determine the mineral solubility constant. The dissolution experiments were carried out at pH = 3.5 for 12 years. Vanadinite has dissolved incongruently, continuously re-precipitating into chervetite (Pb2V2O7) with the two minerals remaining in mutual equilibrium until termination of the experiments. The empirically derived solubility constant Ksp,V,298 = 10–91.89 ± 0.05 of vanadinite was determined for the first time. The proposed modeling method is versatile and can be adopted to other mineral systems undergoing incongruent dissolution.
