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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).

Show MeSH
XRD patterns from Aljustrel sample, before and after the DTA-TG assay: Ang–anglesite (PbSO4, JCPDF card nr. 5-577); H–hematite (α-Fe2O3, 13-534); “J”–jarosite [KFe3(SO4)2(OH)6, 22-827]; Q–quartz (α-SiO2, 5-490); ?–weak lines (non identifiable).
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f2-ijerph-08-01575: XRD patterns from Aljustrel sample, before and after the DTA-TG assay: Ang–anglesite (PbSO4, JCPDF card nr. 5-577); H–hematite (α-Fe2O3, 13-534); “J”–jarosite [KFe3(SO4)2(OH)6, 22-827]; Q–quartz (α-SiO2, 5-490); ?–weak lines (non identifiable).

Mentions: The mineralogy of these materials clearly reflects the differences in elemental composition. The red mine waste from Aljustrel is composed of hematite and jarosite and does not comprise a specific lead-term (Figure 2).


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)

XRD patterns from Aljustrel sample, before and after the DTA-TG assay: Ang–anglesite (PbSO4, JCPDF card nr. 5-577); H–hematite (α-Fe2O3, 13-534); “J”–jarosite [KFe3(SO4)2(OH)6, 22-827]; Q–quartz (α-SiO2, 5-490); ?–weak lines (non identifiable).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2-ijerph-08-01575: XRD patterns from Aljustrel sample, before and after the DTA-TG assay: Ang–anglesite (PbSO4, JCPDF card nr. 5-577); H–hematite (α-Fe2O3, 13-534); “J”–jarosite [KFe3(SO4)2(OH)6, 22-827]; Q–quartz (α-SiO2, 5-490); ?–weak lines (non identifiable).
Mentions: The mineralogy of these materials clearly reflects the differences in elemental composition. The red mine waste from Aljustrel is composed of hematite and jarosite and does not comprise a specific lead-term (Figure 2).

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