Distribution and background levels of mercury in sediment cores selected Wisconsin lakes

The vertical distribution of Hg in sediment cores from a range of hard- and soft-water lakes in Wisconsin was evaluated in terms of potential sources of Hg during the 19th and 20th centuries. For the Modison lakes, the trends in Hg distribution were related to variations in sewage inputs during the...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 1973-01, Vol.2 (1), p.105-118
Main Authors: Syers, J K, Iskandar, I K, Keeney, DR
Format: Article
Language:English
Subjects:
Freshwater
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Summary:The vertical distribution of Hg in sediment cores from a range of hard- and soft-water lakes in Wisconsin was evaluated in terms of potential sources of Hg during the 19th and 20th centuries. For the Modison lakes, the trends in Hg distribution were related to variations in sewage inputs during the last 80 year. It is unlikely that either inputs of sewage or erosional products are responsible for the observed accumulation of Hg in the most recent sediments from 3 lakes in northeastern Wisconsin. Background levels varied from 0.01 to 0.24 ppm of Hg (intact sediment basis) in precultural sediments from the Wisconsin lakes investigated. There was no consistent relationship between the concentration of Hg and other sediment components of potential importance in the retention of Hg.
ISSN:0049-6979