Estimation of Trace Metal Storage in Lake St. Clair Post-Settlement Sediments Using Composite Samples |
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| Affiliation: | 1. National Oceanography Centre, Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK;2. University of Geneva, Department of Genetics and Evolution, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland;3. Institut Français de Recherche pour l''Exploitation de la Mer, Centre Bretagne, ZI de la Pointe du Diable, CS 10070, 29280 Plouzané, France;4. P.P.Shirshov Institute of Oceanology RAS, 117997 Moscow, Nakhimovsky prosp. 36, Russia;1. Ecological Risk Research Department, KIOST (Korea Institute of Ocean Science and Technology), Geoje 53201, Republic of Korea;2. Department of Ocean Science, University of Science and Technology, Daejeon 34113, Republic of Korea;3. Ballast Water Research Center, KIOST (Korea Institute of Ocean Science and Technology), Geoje 53201, Republic of Korea;4. Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, MD 20688, United States;1. Earth System Science Center (CCST), National Institute for Space Research (INPE), Av. dos Astronautas, 1758, 12227-010 São José dos Campos, SP, Brazil;2. Centro Estadual de Educação Tecnológica Paula Souza, Faculdade de Tecnologia de Jacareí (FATEC), Jacareí, SP, Brazil;3. Centro Nacional de Monitoramento e Alertas para Desastres Naturais (CEMADEN), Rodovia Presidente Dutra, Km 39, 12630-000 Cachoeira Paulista, SP, Brazil;4. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Belém-PA, CEP 66095-100, Brazil;5. Center for Weather Forecast and Climate Studies (CPTEC), National Institute for Spatial Research (INPE), Rodovia Presidente Dutra, Km 39, 12630-000 Cachoeira Paulista, SP, Brazil;6. Chair group Water Systems and Global Change, Wageningen University, PO Box 47, 6700 AA Wageningen, the Netherlands |
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| Abstract: | Sediment cores were collected from 36 stations in Lake St. Clair during 1985 by divers. Usually within hours of collection, replicate cores were extruded and sectioned into 1-to 2-cm intervals. One replicate was stored by Canada Centre for Inland Waters personnel for organic contaminant, mercury, and major element analyses. The other replicate was stored by Great Lakes Research Division and Great Lakes Environmental Research Laboratory personnel for Cs-137, Pb-210, grain size, total carbon, and trace metal analyses. In order to estimate the mass of trace metals stored in the lake sediments, equal mass sections of each core were composited. These and individual sections of each core were analyzed and the total mass and anthropogenic mass of each metal in culturally impacted sediments were calculated. Estimated total and anthropogenic masses (metric tons) are: bismuth, 27 and 13; cadmium, 690 and 440; chromium, 5,100 and 1,800; copper, 3,000 and 1,500; nickel, 4,000 and 1,300; lead, 3,200 and 1,500; antimony, 25 and 13; and zinc, 11,000 and 3,300. |
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