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The biogeochemical cycling of trace metals in the water column of Lake Sammamish, Washington: response to seasonally anoxic conditions

Limnology and Oceanography

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, ,

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Abstract

Spatial and temporal changes in the redox conditions of the bottom waters result in increases in dissolved Co and Ni concentrations, peaks in particulate Co profiles, decreases in dissolved Cu and Cr concentrations, and significant changes in dissolved metal speciation during stagnation. The redox-driven cycling of Fe and Mn in the hypolimnion has a dramatic effect on Co disturbutions, a slight effect on Ni concentrations, and virtually no effect on Cd, Cu, Cr, and Zn concentrations. Biological uptake and regeneration processes result in a correlation between Zn and silicate concentrations throughout the water column, and it appears that biological cycling may also influence the distribution of Cd. During the sulfidic phase of stagnation dissolved Cd concentrations in the bottom-waters may be controlled by metal-sulfide precipitation, Cr(VI) is probably reduced to more particle-reactive Cr(III) and removed by settling particles, and Cu(II) is most likely reduced to Cu(I) and precipitated as a metal-sulfide phase. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The biogeochemical cycling of trace metals in the water column of Lake Sammamish, Washington: response to seasonally anoxic conditions
Series title:
Limnology and Oceanography
Volume
37
Issue:
3
Year Published:
1992
Language:
English
Publisher:
American Society of Limnology and Oceanography
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
529
Last page:
548
Number of Pages:
20