Mimetite precipitation on Pb-clinoptilolite: an effective approach for arsenate removal from water
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/k...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Sciendo
2025-07-01
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| Series: | Mineralogia |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/mipo-2025-0006 |
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| Summary: | 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:
5Pb2+desorbed from zeolite+3AsO43−contamination+Cl−supplied extra=Pb5AsO43 Clprecipitated5{{\text{Pb}}^{2+}}_{\text{desorbed}\ \text{from}\ \text{zeolite}}+3{{\text{AsO}_{4}^{3-}}_{\text{contamination}}}+\text{C}{{\text{l}}^{-}}_{\text{supplied}\ \text{extra}}={{\text{Pb}}_{5}}{{\left( {{\text{AsO}}_{4}} \right)}_{3}}{{\text{Cl}}_{\text{precipitated}}} |
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| ISSN: | 1899-8526 |