Stable lead isotope record of lead pollution in Loch Lomond sediments since 1630 A.D
Article Abstract:
The sources of lead (Pb) pollution in Loch Lomond, Scotland, were determined by measuring lead concentration in the lake sediments to provide stable lead isotope data from the 1920s to the present. There were significant declines in lead concentration and lead isotope ratio from 1929 to 1991. In contrast to this observation, there was significant deposition of lead from the urban and industrial areas from the 1920s to the 1950s. It is suggested that the introduction of unleaded petrol in 1920 contributed in reducing Pb sources in the atmosphere. The early deposition of Pb is attributed to Pb produced in past human activities.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Recent changes in stable lead isotope ratios in sediments of Lake Zug, Switzerland
Article Abstract:
Analyses of lead (Pb) concentrations and Pb isotope ratios in sediments of Lake Zug, Switzerland, using inductively coupled plasma mass spectrometry revealed significant decreases in Pb concentrations and Pb isotope ratios in the sediment. Comparison with the Pb concentrations and Pb isotope ratios in sediments of Lake Baldegg revealed slightly higher Pb concentrations in Lake Zug. Both lakes had similar Pb isotope ratios. The reductions in Pb concentrations and Pb isotope ratios in sediments of Lake Zug were attributed to decreased Pb emissions from gasoline.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Sources and burden of lead in St. Lawrence Estuary sediments: isotopic evidence
Article Abstract:
A study was conducted on the concentration and isotopic composition of lead found in sediments from stations situated along the Laurentian Trough of the St. Lawrence Estuary. Results show that the lead originated from two natural sources and from industrial pollution. The natural sources were believed to be from crystalline rocks of the Canadian Shield. The composition of the industrial lead, on the other hand, was found to be similar to those found in the air of Canadian urban regions.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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