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Natural Biomineralization in the Contaminated Sediment-Water System at the Ingurtosu Abandoned Mine

  • D. Medas
  • R. Cidu
  • P. Lattanzi
  • F. Podda
  • G. De Giudici
Chapter
Part of the Soil Biology book series (SOILBIOL, volume 31)

Abstract

The Ingurtosu Pb–Zn mine (S-W Sardinia) was exploited for about a century until 1968. Huge amounts of tailings were abandoned, resulting in long-term heavy metal dispersion processes in both soils and waters. Zn and Pb concentration in tailings and soils attains values up to thousands of mg per kilogram. The maximum Zn concentration in water attains several hundreds of mg per liter, whereas Cd and Pb concentrations are in the order of thousands of μg per liter. Heavy metal concentration in waters of Rio Naracauli, the main stream of the area, is abated by seasonal biomineralization processes. Precipitation of hydrozincite [Zn5(CO3)2(OH)6] and of a Zn-rich amorphous phase results in a decrease of Zn concentration down to a few mg per liter. Other metals such as Pb, Cd, Cu, and Ni are coprecipitated with the Zn phases. This chapter reports the state of our knowledge on the Naracauli biomineralization process.

Keywords

Inductively Couple Plasma Mass Spectrometry Saturation Index Lawrence Livermore National Laboratory XRPD Pattern Biomineralization Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

This work was funded by the EU UMBRELLA project (grant number 226870). Rainfall data were kindly provided by hydrological service of Regione Autonoma della Sardegna. Katarzyna Turnau (Krakow University) is acknowledged for microscope work and scientific discussion.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • D. Medas
    • 1
  • R. Cidu
    • 1
  • P. Lattanzi
    • 1
  • F. Podda
    • 1
  • G. De Giudici
    • 1
  1. 1.Department of Earth SciencesUniversity of CagliariCagliariItaly

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