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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Predicting Geochemical Behaviour of Waste Rock with Low Acid Generating Potential Using Laboratory Kinetic Tests
Mine Water and the Environment, Volume 30, No. 1, Year 2011
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Description
Prediction of contaminated neutral drainage using laboratory kinetic tests designed for acid mine drainage prediction is challenging because of the low metal concentrations generated by low sulfide oxidation rates. Fresh and weathered samples from the Tio mine waste rock piles were submitted to humidity cell tests. The waste rocks were demonstrated to be non-acid generating in the long term, as interpreted by conservative oxidation-neutralization curves. The results demonstrate that even though the main neutralizing minerals react differently after 25 years of natural weathering (with regard to Ca, Mg, Al, and Si release), the response of the fresh waste rocks during humidity cell leaching was very similar to those of the weathered waste rocks, when considering all the elements related to silicate dissolution, including those implicated in secondary phase precipitation. However, Ni generation was greater in the weathered waste rocks even though sulfide oxidation rates were similar, as Ni sorption properties reach saturation. Although the Ni concentrations from the leachates of humidity cell tests remain below regulated values, they are bound to increase with continued weathering if no preventive or control measures are undertaken at the site. © 2010 Springer-Verlag.
Authors & Co-Authors
Plante, Benoît
Canada, Rouyn-noranda
Université du Québec en Abitibi-témiscamingue
Benzaazoua, Mostafa
Canada, Rouyn-noranda
Université du Québec en Abitibi-témiscamingue
Canada, Ottawa
Canada Research Chairs
Bussière, Bruno
Canada, Rouyn-noranda
Université du Québec en Abitibi-témiscamingue
Canada, Ottawa
Canada Research Chairs
Statistics
Citations: 61
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1007/s10230-010-0127-z
ISSN:
10259112
Study Approach
Qualitative