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| Titel |
Lead isotopes and trace metal ratios of aerosols as tracers of Pb pollution sources in Kanpur, India |
| VerfasserIn |
Indra Sen, Michael Bizimis, Sachchida Tripathi, Debajyoti Paul, Swati Tyagi, Deep Sengupta |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250105591
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| Publikation (Nr.) |
 EGU/EGU2015-5125.pdf |
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| Zusammenfassung |
| The anthropogenic flux of Pb in the Earth’s surface is almost an order of magnitude higher
than its corresponding natural flux [1]. Identifying the sources and pathways of
anthropogenic Pb in environment is important because Pb toxicity is known to have adverse
effects on human health. Pb pollution sources for America, Europe, and China
are well documented. However, sources of atmospheric Pb are unknown in India,
particularly after leaded gasoline was phased out in 2000. India has a developing
economy with a rapidly emerging automobile and high temperature industry, and
anthropogenic Pb emission is expected to rise in the next decade. In this study, we
report on the Pb- isotope compositions and trace metal ratios of airborne particulates
collected in Kanpur, an industrial city in northern India. The Pb concentration in the
airborne particulate matter varies between 14-216 ng/m3, while the other heavy metals
vary by factor of 10 or less, e.g. Cd=0.3-3 ng/m3, As=0.4-3.5 ng/m3, Zn=36-161
ng/m3, and Cu=3-22 ng/m3. The 206Pb/207Pb, 208Pb/206Pb, and 208Pb/207Pb vary
between 1.112 - 1.129, 2.123-2.141, and 2.409-2.424 respectively, and are highly
correlated with each other (R2>0.9). Pb isotopes and trace metal data reveals that
coal combustion is the major source of anthropogenic Pb in the atmosphere, with
limited contribution from mining and smelting processes. We further conclude that
combination of Pb isotope ratios and V/Pb ratios are powerful tracers for Pb source
apportionment studies, which is otherwise difficult to differentiate based only on Pb
systematics
[1] Sen and Peucker-Ehrenbrink (2012), Environ. Sci. Technol.(46), 8601-8609 |
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