| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Assessment of the metal contamination evolution in the Loire estuary using Cu and Zn stable isotopes and geochemical data in sediments
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| Autores: |
Ferreira Araujo, Daniel
Ponzevera, Emmanuel
Briant, Nicolas
Knoery, Joel
Sireau, Teddy
Mojtahid, Meryem
Metzger, Edouard
Brach-papa, Christophe
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| Data: |
2019-06
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| Ano: |
2019
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| Palavras-chave: |
Coastal pollution
Coastal biogeochemistry
Geochemical tracers
Metal isotopes
Trace metal
Anthropogenic contamination
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| Resumo: |
In this work, a multi-elemental approach combining Cu and Zn stable isotopes is used to assess the metal contamination evolution in the Loire estuary bulk sediments. Elemental geochemical data indicate an increase of metal concentrations from the beginning of the industrial period peaking in the 1990s, followed by an attenuation of metal contamination inputs to the estuary. Zinc isotope compositions suggest a binary mixing process between Zn derived from terrigenous material and multi-urban anthropogenic sources. Copper isotope systematics indicate a single natural dominant source represented by weathered silicate particles from soils and rocks. This work demonstrates the applicability of Zn isotopes to identify anthropogenic Zn sources in coastal systems, even under a low to moderate degree of contamination. Further studies are required to constrain Cu sources and to elucidate possible effects of grain-size and mineralogy in the Cu isotope composition of sediment in the Loire estuary.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00490/60188/67760.pdf
DOI:10.1016/j.marpolbul.2019.04.034
https://archimer.ifremer.fr/doc/00490/60188/
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| Editor: |
Elsevier BV
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| Formato: |
application/pdf
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| Fonte: |
Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2019-06 , Vol. 143 , P. 12-23
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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