Heavy metal pollution in the sediments of the Coeur d'Alene River,Idaho |
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| Authors: | D E Reece J R Felkey C M Wai |
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| Institution: | (1) Department of Chemistry, University of Idaho, 83843 Moscow, Idaho |
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| Abstract: | Analysis of sediment samples collected from the Coeur d'Alene River in northern Idaho, USA, indicates that the main stem and
the south fork of the river are contaminated with heavy metals (Cd, Pb, Mn, and Zn) from the local mining operations. Laboratory
experiments indicate that these metals in the sediments can be leached and reach saturation concentrations in water in a relatively
short period of time. The rate of leaching of heavy metals with distilled water appeared to follow first-order kinetics. The
saturation concentrations of Mn and Zn in water reached ppm levels from the leaching process. Cadmium and Pb are much less
soluble relative to Zn in the sediments. The high concentrations of heavy metals in the sediments are a source of contamination
that should be considered for the water quality management planning of the Coeur d'Alene River-Lake system. |
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