Soil/sediment interaction with ground and surface water during lake recovery : potential biological treatment measures 1998-2003 : laboratory simulations
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Date
2006-01
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Abstract
During the early flooding period of the Gaertner Pit in the early 1990s, Boojum Research
Ltd. assessed the likelihood of elevated solute concentrations in the recovering surface
waters within the Key Lake project area. The sediments in the dewatered lakes had been
exposed to the atmosphere for many years and there was a concern that the resulting iron
oxidation could lead to pH depressions and subsequent release of Ni during and after lake
recovery. The levels of nickel were of particular interest, as higher concentrations of
nickel in the sediments were mostly found in material with high organic content. This
material was likely decomposed during the period of atmospheric exposure, and hence
more likely to release contaminants.
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Keywords
ground water, surface water, lake recovery, soil interaction, sediment interaction, monitoring program, easily degradable organics (EDO)