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Examining the Interrelation of Total, Soluble, and Bioavailable Metals in the Sediments of Urban Artificial Lakes  

Baek, Yong-Wook (Department of Environmental Science, Konkuk University)
An, Youn-Joo (Department of Environmental Science, Konkuk University)
Publication Information
Korean Journal of Ecology and Environment / v.41, no.1, 2008 , pp. 66-72 More about this Journal
Abstract
Total metals, soluble metals, and bioavailable metals were monitored at the sediments of urban lakes located in Seoul, Korea during spring season 2006. The metals measured were zinc, arsenic, chromium, copper, nickel, and cadmium, which are known to be toxic to human health and ecosystems. The main sources of heavy metals in the lakes were urban runoff and atmospheric deposition associated with air pollution in urban areas. Extraction by using a weak electrolyte solution (0.1 M $Ca(NO_3)_2$) was used to predict bioavailability of the metals. Among the six heavy metals studied, copper was the most bioavailable, based the weak electrolyte extraction techniques. Since metal toxicity is related to metal bioavailability, the results were consistent with the high ecotoxicity of copper, compared to other heavy metals. Overall results suggest that there was no direct relationship between total and bioavailable metal concentration, although zinc, copper and cadmium show some relationships.
Keywords
urban artificial lake; sediment; heavy metal; bioavailability; copper;
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