Identification of secondary lead sources in the air of an urban environment
High precision lead isotopic data have been measured from particulates deposited on filters from two suburbs of Sydney (NSW, Australia) and gasoline from two main brands to evaluate the source of lead in air following the phasing out of leaded gasoline in Sydney in 1986 and a 25% reduction of lead i...
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ftunivgeneve:oai:unige.ch:unige:18894 2023-05-15T13:48:35+02:00 Identification of secondary lead sources in the air of an urban environment Chiaradia, Massimo Gulson, Brian L. James, Matthew William Jameson, C. Johnson, David 1997 https://archive-ouverte.unige.ch/unige:18894 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1016/S1352-2310(97)00218-5 unige:18894 https://archive-ouverte.unige.ch/unige:18894 info:eu-repo/semantics/ ISSN: 1352-2310 Atmospheric environment, Vol. 31, No 21 (1997) pp. 3511-3521 Text Article scientifique info:eu-repo/semantics/article info:eu-repo/semantics/metadataOnly 1997 ftunivgeneve https://doi.org/10.1016/S1352-2310(97)00218-5 2022-06-19T23:38:27Z High precision lead isotopic data have been measured from particulates deposited on filters from two suburbs of Sydney (NSW, Australia) and gasoline from two main brands to evaluate the source of lead in air following the phasing out of leaded gasoline in Sydney in 1986 and a 25% reduction of lead in leaded gasoline in 1994. These measures have resulted in a 75% reduction of lead in Sydney air nowadays. Despite these positive figures, our results indicate that gasoline still accounts for more than 90% of the lead in the atmosphere of this city. However, when compared with an earlier investigation carried out in the period 1979-1981, our data show that a background source with a 206Pb204Pb isotopic ratio higher than petrol has become detectable. We have used a best fitting mathematical procedure to identify the isotopic ratio and percentage contribution of this source to the air. The values that we have obtained are 18.2 and 7%, respectively, for the 206Pb204Pb ratio and the percentage contribution. Several local background sources are considered, including natural lead from soils, wood burning, coal burning in power stations and aircraft propellants. We also draw attention to the similarity of the background isotopic composition in Sydney air and isotopic ratios measured in snows of Antarctica. Article in Journal/Newspaper Antarc* Antarctica Université de Genève: Archive ouverte UNIGE Atmospheric Environment 31 21 3511 3521 |
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Université de Genève: Archive ouverte UNIGE |
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English |
description |
High precision lead isotopic data have been measured from particulates deposited on filters from two suburbs of Sydney (NSW, Australia) and gasoline from two main brands to evaluate the source of lead in air following the phasing out of leaded gasoline in Sydney in 1986 and a 25% reduction of lead in leaded gasoline in 1994. These measures have resulted in a 75% reduction of lead in Sydney air nowadays. Despite these positive figures, our results indicate that gasoline still accounts for more than 90% of the lead in the atmosphere of this city. However, when compared with an earlier investigation carried out in the period 1979-1981, our data show that a background source with a 206Pb204Pb isotopic ratio higher than petrol has become detectable. We have used a best fitting mathematical procedure to identify the isotopic ratio and percentage contribution of this source to the air. The values that we have obtained are 18.2 and 7%, respectively, for the 206Pb204Pb ratio and the percentage contribution. Several local background sources are considered, including natural lead from soils, wood burning, coal burning in power stations and aircraft propellants. We also draw attention to the similarity of the background isotopic composition in Sydney air and isotopic ratios measured in snows of Antarctica. |
format |
Article in Journal/Newspaper |
author |
Chiaradia, Massimo Gulson, Brian L. James, Matthew William Jameson, C. Johnson, David |
spellingShingle |
Chiaradia, Massimo Gulson, Brian L. James, Matthew William Jameson, C. Johnson, David Identification of secondary lead sources in the air of an urban environment |
author_facet |
Chiaradia, Massimo Gulson, Brian L. James, Matthew William Jameson, C. Johnson, David |
author_sort |
Chiaradia, Massimo |
title |
Identification of secondary lead sources in the air of an urban environment |
title_short |
Identification of secondary lead sources in the air of an urban environment |
title_full |
Identification of secondary lead sources in the air of an urban environment |
title_fullStr |
Identification of secondary lead sources in the air of an urban environment |
title_full_unstemmed |
Identification of secondary lead sources in the air of an urban environment |
title_sort |
identification of secondary lead sources in the air of an urban environment |
publishDate |
1997 |
url |
https://archive-ouverte.unige.ch/unige:18894 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 1352-2310 Atmospheric environment, Vol. 31, No 21 (1997) pp. 3511-3521 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1352-2310(97)00218-5 unige:18894 https://archive-ouverte.unige.ch/unige:18894 |
op_rights |
info:eu-repo/semantics/ |
op_doi |
https://doi.org/10.1016/S1352-2310(97)00218-5 |
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Atmospheric Environment |
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31 |
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21 |
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3511 |
op_container_end_page |
3521 |
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1766249461105819648 |