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Incongruent weathering of Cd and Zn from mine tailings

Published online by Cambridge University Press:  05 July 2018

D. Kossoff ,
K. A. Hudson-Edwards ,
W. E. Dubbin  and
M. Alfredsson
D. Kossoff*
Affiliation:
Research School of Earth Sciences at UCL-Birkbeck, University of London, Malet St., London WC1E 7HX, UK Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
K. A. Hudson-Edwards
Affiliation:
Research School of Earth Sciences at UCL-Birkbeck, University of London, Malet St., London WC1E 7HX, UK
W. E. Dubbin
Affiliation:
Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
M. Alfredsson
Affiliation:
School of Physical Sciences, Ingram Building, University of Kent, Canterbury CT2 7NH, UK
*
*E-mail: jkoss02@students.bbk.ac.uk
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Abstract

Weathering ofdischarged mine tailings contaminates streams, rivers and floodplains with toxic metals on a vast scale. The magnitude of the problem depends on input tailings mineralogy, storage and dispersal, and climatic conditions. To better understand the mechanisms of long-term tailings weathering, a leaching column study was established, incorporating tailings and soil from Potosí, Bolivia, with the aim of modelling a 25 year field period. The Zn/Cd molar ratio ofthe tailings leachate water, initially 738 for the unaltered tailings, is highly variable over 15 model years of leaching, particularly in the mixed tailings-soil columns. Columns with soil have ratios as high as 2563, while pure tailings columns reach ratios of <376. We employ complementary techniques, involving atomistic computational modelling, leachate analysis and mineralogical characterization, to elucidate the mechanisms governing these incongruent Cd and Zn weathering dynamics.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 81 - 84
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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References

Acero, P., Ayora, C. and Carrera, J. (2007) Coupled thermal, hydraulic and geochemical evolution of pyritic tailings in unsaturated column experiments. Geochimica et Cosmochimica Acta, 71, 5325–5338.CrossRefGoogle Scholar
Drever, J.I. (1997) The Geochemistry of Natural Waters. Prentice-Hall, Upper Saddle, NJ, USA.Google Scholar
Hudson-Edwards, K.A., Macklin, M.G., Miller, J.R. and Lechler, PJ. (2001) Sources, distribution and storage of heavy metals in the Rio Pilcomayo, Bolivia. Journal of Geochemical Exploration, 72, 229–250.CrossRefGoogle Scholar
Hudson-Edwards, K.A., Macklin, M.G., Jamieson, H.E., Brewer, P.A., Coulthard, T.J., Howard, A.J. and Turner, J. (2003) The impact of tailings dam spills and clean-up operations on sediment and water quality in river systems: The Rios Agrio-Guadiamar, Aznalcollar, Spain. Applied Geochemistry, 18, 221–239.CrossRefGoogle Scholar
Miller, J.R., Hudson-Edwards, K.A., Lechler, P.J., Preston, D. and Macklin, M.G. (2004) Heavy metal contamination of water, soil and produce within riverine communities of the Rio Pilcomayo basin, Bolivia. Science of the Total Environment, 320, 189–209.CrossRefGoogle ScholarPubMed
Pretes, M. (2002) Touring mines and mining tourists. Annals of Tourism Research, 29, 439–456.CrossRefGoogle Scholar
Smolders, A.J.P., Hudson-Edwards, K.A., van der Velde, G. and Roelofs, J.G.M. (2004) Controls on water chemistry of the Pilcomayo river (Bolivia, South-America). Applied Geochemisty, 19, 1745–1758.Google Scholar
Waltham, T. (2005) The rich hill of Potosí. Geology Today, 21, 187.CrossRefGoogle Scholar