Field retention tests to evaluate nickel retention on mine waste rock

Isabelle Demers, Bruno Bussière, Benoît Plante

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Geoenvironmental Engineering

ABSTRACT: A field retention test campaign was designed to verify the retention -rich water over several hours and the nickel concentration in the effluent samples was monitored. It was found that the fresh waste rock was able to maintain very low Ni concentrations in its effluent, while the weathered waste rock released most if not all the Ni that was added with the input water, therefore had barely any retention capacity. The results from the field campaign confirm the hypothesis that sorption of nickel is a significant factor in contaminated neutral drainage CND generation at this mine site.

RÉSUMÉ: Une campagne de terrain a été entreprise pour vérifier la rétention du nickel sur deux cellules expérimentales, une ériles frais a conservé des concentrations t que très peu de capacité de rétention. Les résultats de cette campagne de terrain confirment que la sorption du nickel est un facteur important dans la génération du drainage neutre contaminé DNC à ce site minier.

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