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The positive environmental contribution of jarosite by retaining lead in acid mine drainage areas.

Figueiredo MO, da Silva TP - Int J Environ Res Public Health (2011)

Bottom Line: Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits.Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobilizer of such metals, particularly lead.The mineral chemistry of jarosite is reviewed and the results of a Fe K-edge XANES (X-Ray Absorption Near-Edge Structure) study of K-, Na- and Pb-jarosite are described and discussed within the context of the abandoned old mines of São Domingos and Aljustrel located in southern Portugal, in the Iberian Pyrite Belt (IPB).

View Article: PubMed Central - PubMed

Affiliation: Unity of Mineral Resources and Geophysics, Laboratório Nacional de Energia e Geologia, Apartado 7586, 2721-866 Alfragide, Portugal. ondina.figueiredo@lneg.pt

ABSTRACT
Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits. Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobilizer of such metals, particularly lead. The mineral chemistry of jarosite is reviewed and the results of a Fe K-edge XANES (X-Ray Absorption Near-Edge Structure) study of K-, Na- and Pb-jarosite are described and discussed within the context of the abandoned old mines of São Domingos and Aljustrel located in southern Portugal, in the Iberian Pyrite Belt (IPB).

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Pre-edge region of Fe K-edge XANES spectra collected from various jarosites.
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Related In: Results  -  Collection

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f1-ijerph-08-01575: Pre-edge region of Fe K-edge XANES spectra collected from various jarosites.

Mentions: The pre-edge features of Fe 1s XANES spectra from K-, Na- and Pb-jarosites are reproduced in Figure 1. As expected from octahedral ferric iron [14], the average pre-peak centroid is located at about 7,114 eV.


The positive environmental contribution of jarosite by retaining lead in acid mine drainage areas.

Figueiredo MO, da Silva TP - Int J Environ Res Public Health (2011)

Pre-edge region of Fe K-edge XANES spectra collected from various jarosites.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3108128&req=5

f1-ijerph-08-01575: Pre-edge region of Fe K-edge XANES spectra collected from various jarosites.
Mentions: The pre-edge features of Fe 1s XANES spectra from K-, Na- and Pb-jarosites are reproduced in Figure 1. As expected from octahedral ferric iron [14], the average pre-peak centroid is located at about 7,114 eV.

Bottom Line: Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits.Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobilizer of such metals, particularly lead.The mineral chemistry of jarosite is reviewed and the results of a Fe K-edge XANES (X-Ray Absorption Near-Edge Structure) study of K-, Na- and Pb-jarosite are described and discussed within the context of the abandoned old mines of São Domingos and Aljustrel located in southern Portugal, in the Iberian Pyrite Belt (IPB).

View Article: PubMed Central - PubMed

Affiliation: Unity of Mineral Resources and Geophysics, Laboratório Nacional de Energia e Geologia, Apartado 7586, 2721-866 Alfragide, Portugal. ondina.figueiredo@lneg.pt

ABSTRACT
Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits. Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobilizer of such metals, particularly lead. The mineral chemistry of jarosite is reviewed and the results of a Fe K-edge XANES (X-Ray Absorption Near-Edge Structure) study of K-, Na- and Pb-jarosite are described and discussed within the context of the abandoned old mines of São Domingos and Aljustrel located in southern Portugal, in the Iberian Pyrite Belt (IPB).

Show MeSH