Document Detail

Atmospheric lead deposition to Okefenokee Swamp, Georgia, USA.
MedLine Citation:
PMID:  15182975     Owner:  NLM     Status:  MEDLINE    
Contamination of the environment from atmospheric deposition during the twentieth century is pervasive even in areas ostensibly considered pristine or remote from point sources. In this study, Pb concentrations in a 210Pb-dated peat core collected from the Okefenokee Swamp, GA were used to assess historical contaminant input via atmospheric deposition. Lead isotope ratios were determined by dynamic reaction cell ICP-MS (DRC-ICP-MS). Increases in Pb concentration occurred in the late nineteenth century and a marked rise in Pb concentrations pre-dated the widespread use of leaded gasoline within the US. The 206Pb/207Pb ratios of 1.19 during this period were consistent with coal combustion emissions. A later increase in Pb concentration, concurrent with a trend toward more radiogenic 206Pb/207Pb ratios in gasoline is consistent with an increased input of Pb from leaded gasoline emissions. However, it appears that coal combustion emissions remain a major source of Pb to the Okefenokee.
Brian P Jackson; Parley V Winger; Peter J Lasier
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Publication Detail:
Type:  Historical Article; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  130     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-06-08     Completed Date:  2004-11-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  445-51     Citation Subset:  IM    
Advanced Analytical Center for Environmental Sciences, Savannah River Ecology Laboratory, University of Georgia PO Drawer E, Aiken, SC 29802, USA.
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MeSH Terms
Air Pollutants / analysis,  history*
Coal / history
Environmental Monitoring / methods
Geologic Sediments / analysis
History, 20th Century
Lead / analysis*
Soil / analysis*
Vehicle Emissions
Water Pollutants, Chemical / analysis*
Reg. No./Substance:
0/Air Pollutants; 0/Coal; 0/Soil; 0/Vehicle Emissions; 0/Water Pollutants, Chemical; 7439-92-1/Lead

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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