Document Detail


Atmospheric lead deposition to Okefenokee Swamp, Georgia, USA.
MedLine Citation:
PMID:  15182975     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
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    
Affiliation:
Advanced Analytical Center for Environmental Sciences, Savannah River Ecology Laboratory, University of Georgia PO Drawer E, Aiken, SC 29802, USA. jackson@srel.edu
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / analysis,  history*
Coal / history
Environmental Monitoring / methods
Geologic Sediments / analysis
Georgia
History, 20th Century
Lead / analysis*
Soil / analysis*
Vehicle Emissions
Water Pollutants, Chemical / analysis*
Chemical
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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