FN Archimer Export Format PT J TI Assessment of the metal contamination evolution in the Loire estuary using Cu and Zn stable isotopes and geochemical data in sediments BT AF FERREIRA ARAUJO, Daniel Ponzevera, Emmanuel Briant, Nicolas Knoery, Joel Sireau, Teddy Mojtahid, Meryem Metzger, Edouard Brach-Papa, Christophe AS 1:1;2:1;3:1;4:1;5:1;6:2;7:2;8:1,3; FF 1:PDG-RBE-BE-LBCM;2:PDG-RBE-BE-LBCM;3:PDG-RBE-BE-LBCM;4:PDG-RBE-BE-LBCM;5:PDG-RBE-BE-LBCM;6:;7:;8:PDG-ODE-LITTORAL-LERPAC; C1 Laboratoire de Biogéochimie des Contaminants Métalliques, Ifremer, Centre Atlantique, F44311 Nantes Cedex 3, France UMR-CNRS 6112, LPG-BIAF, University of Angers, University of Nantes, UFR Sciences, 2 bd Lavoisier, 49045 Angers Cedex 01, France Laboratoire Environnement Ressources Provence Azur Corse, Ifremer, Zone portuaire de Brégaillon, CS 20330, 83507 La Seyne sur Mer Cedex, France C2 IFREMER, FRANCE UNIV ANGERS, FRANCE IFREMER, FRANCE SI NANTES TOULON SE PDG-RBE-BE-LBCM PDG-ODE-LITTORAL-LERPAC IN WOS Ifremer UPR copubli-france copubli-univ-france IF 4.049 TC 39 UR https://archimer.ifremer.fr/doc/00490/60188/67760.pdf LA English DT Article CR ROCCHSED - RNOSED DE ;Coastal pollution;Coastal biogeochemistry;Geochemical tracers;Metal isotopes;Trace metal;Anthropogenic contamination AB 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. PY 2019 PD JUL SO Marine Pollution Bulletin SN 0025-326X PU Elsevier BV VL 143 UT 000473121200003 BP 12 EP 23 DI 10.1016/j.marpolbul.2019.04.034 ID 60188 ER EF