Mercury speciation and mobilization in contaminated soils of the Valle del Azogue Hg mine (SE, Spain)

A. Navarro, H. Biester, J. L. Mendoza, E. Cardellach

Research output: Contribution to journalArticleResearchpeer-review

53 Citations (Scopus)

Abstract

Hg mobilization from contaminated soils and mine wastes was the source of environmental contamination in the Valle del Azogue mining area. We researched solid-phase speciation and aqueous mobility of Hg through Scanning electron microscopy-energy dispersive X-ray spectroscopy and electron probe microanalysis analysis, solid-phase-Hg-thermo-desorption (SPTD) and laboratory column experiments. We found that in contaminated soils and mine wastes, the predominant Hg species was cinnabar (HgS), mainly formed from the weathering of Hg-rich pyrite, and metallic Hg (0) in the matrix, whereas in calcines and tailings the dominant species was metallic Hg (0). The mobilization of Hg in the aqueous phase seems to have originated from the dissolution of elemental Hg (0) present in soils and wastes, reaching concentrations of up to 67 μg 1 -1, and showing a higher long-term environmental potential risk, in addition to atmospheric emissions. © Springer-Verlag 2005.
Original languageEnglish
Pages (from-to)1089-1101
JournalEnvironmental geology
Volume49
DOIs
Publication statusPublished - 1 Apr 2006

Keywords

  • Calcines
  • Cinnabar
  • Soil contamination

Fingerprint Dive into the research topics of 'Mercury speciation and mobilization in contaminated soils of the Valle del Azogue Hg mine (SE, Spain)'. Together they form a unique fingerprint.

Cite this