Kossoff, D. and Hudson-Edwards, K.A. and Dubbin, W.E. and Alfredsson, M. (2008) Incongruent weathering of Cd and Zn from mine tailings. Mineralogical Magazine, 72 (1). 81-84 . ISSN 0026-461X .
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Weathering of discharged 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 Potosi, Bolivia, with the aim of modelling a 25 year field period. The Zn/Cd molar ratio of the 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.
|Additional information:||Proceedings Paper ( 8th International Symposium on the Geochemistry of the Earths Surface (GES-8) London, ENGLAND, AUG 18-22, 2008)|
|Subjects:||Q Science > QE Geology
T Technology > TN Mining engineering. Metallurgy
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||Louise Dorman|
|Date Deposited:||18 Apr 2009 10:41|
|Last Modified:||18 Apr 2009 10:41|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/14708 (The current URI for this page, for reference purposes)|
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