Szczegóły publikacji
Opis bibliograficzny
Mimetite precipitation on Pb-clinoptilolite: an effective approach for arsenate removal from water / Ewa STĘPIEŃ, Maciej MANECKI, Tomasz BAJDA // Mineralogia / Mineralogical Society of Poland ; ISSN 1899-8291. — Tytuł poprz.: Mineralogia Polonica. — 2025 — vol. 56 iss. 1, s. 44–51. — Bibliogr. s. 50–51, Abstr. — Publikacja dostępna online od: 2025-07-23
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 161553 |
|---|---|
| Data dodania do BaDAP | 2025-08-22 |
| Tekst źródłowy | URL |
| DOI | 10.2478/mipo-2025-0006 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Mineralogia |
Abstract
This short communication proposes a novel approach to arsenate remediation using in situ precipitation of mimetite [Pb₅(AsO₄)₃Cl], a sparingly soluble mineral phase with an apatite structure. The Pb²⁺ source was provided by a lead-modified zeolite (clinoptilolite) loaded with approximately 70 g Pb/kg. It was reacted with arsenate (50 mg As/L) and chloride (20 mg Cl/L) at initial pH values of 2 and 7. Mimetite crystallized on and in the vicinity of zeolite due to the reaction of Pb(II) desorbed from zeolite with arsenate and chloride ions present in aqueous solution: ( ) 3 2 desorbed from zeolite 4 contamination supplied extra 5 4 precipitated3 5Pb 3AsO Cl Pb AsO Cl − + − + + = Mimetite formed rapidly resulting in efficient arsenate sequestration. At pH 7, arsenate removal reached 99.88% after 24 hr, with minimal lead release (<0.02 mg/L). These results demonstrate that lead-modified clinoptilolite is a promising material for a coupled sorption–precipitation mechanism which provides an effective strategy for arsenic immobilization in contaminated aqueous systems.
