Araujo, Daniel

Brach-Papa, Christophe

Briant, Nicolas

Knoery, Joel

Metzger, Édouard

Mojtahid, Meryem

Ponzevera, Emmanuel

Sireau, Teddy

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

Ferreira Araujo, Daniel

Metzger, Edouard

Brach-papa, Christophe

ArchiMer -  Institutional Archive of Ifremer

Assessment of the metal contamination evolution in the Loire estuary using Cu and Zn stable isotopes and geochemical data in sediments

Assessment of the metal contamination evolution in the Loire estuary using Cu and Zn stable isotopes and geochemical data in sediments

Abstract

Similar works

Full text

Available Versions

ArchiMer - Institutional Archive of Ifremer

HAL-Univ-Nantes

Archive Ouverte en Sciences de l'Information et de la Communication

HAL-INSU

Okina