FN Archimer Export Format
PT J
TI Tellurium behaviour in a major European fluvial–estuarine system (Gironde, France): fluxes, solid/liquid partitioning and bioaccumulation in wild oysters
BT 
AF Gil-Díaz, Teba
   Schäfer, Jörg
   Dutruch, Lionel
   Bossy, Cécile
   Pougnet, Frédérique
   Abdou, Melina
   Lerat-Hardy, Antoine
   Pereto, Clément
   Derriennic, Hervé
   Briant, Nicolas
   Sireau, Teddy
   Knoery, Joel
   Blanc, Gerard
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:1;8:1;9:1;10:2;11:2;12:2;13:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:PDG-RBE-BE-LBCM;11:PDG-RBE-BE-LBCM;12:PDG-RBE-BE-LBCM;13:;
C1 Université de Bordeaux, UMR CNRS 5805 EPOC, Allée Geoffroy Saint-Hilaire, 33615 Pessac, France
   IFREMER – RBE/BE/Laboratoire de Biogéochimie des Contaminants Métalliques, BP 21105, Nantes F-44311, France
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
SI NANTES
SE PDG-RBE-BE-LBCM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 1.91
TC 14
UR https://archimer.ifremer.fr/doc/00505/61684/65639.pdf
LA English
DT Article
CR MGTS
   MGTS 2014
   MGTS 2015 LEG1
   MGTS 2015 LEG2
BO Thalia
DE ;Garonne River;Gironde Estuary;Lot River;RNO;ROCCH;technology critical element
AB Tellurium (Te) is a technology critical element (TCE) with largely unknown environmental behaviour, especially in continent-ocean interface systems. The unknown behaviour results from the lack of studies in aquatic environments and from analytical challenges limiting the determination of its naturally low (ultra-trace) environmental levels. We performed a comprehensive study of Te in the Lot–Garonne–Gironde fluvial–estuarine system to better understand seasonal variations, solid/liquid partitioning (Kd), gross fluxes, estuarine dynamics, and transfer to wild oysters at the estuary mouth. A temporal record (2014–2017) of dissolved (Ted) and particulate (Tep) Te concentrations at five sites in the Lot–Garonne River system shows little differences between sites, with average ~0.9 ng L−1 and ~50 µg kg−1 respective concentrations. Watershed Ted and Tep follow parallel seasonal patterns, which result in constant partitioning (log10 Kd ~4.75 L kg−1), with constant annual gross dissolved fluxes (~15.0 kg y−1) and variable gross particulate fluxes (from 6.50 to 140 kg y−1) entering the Gironde Estuary. Estuarine reactivity in contrasting hydrological conditions (from flood to drought) suggest that grain-size effects and/or estuarine hydrological residence times strongly affect Tep behaviour. Historical records (1984–2017) of Te in wild oysters at the estuary mouth vary from 1.33 to 2.89 µg kg−1 dry weight (d.w.), without any clear long-term trend. This study provides rare knowledge on Te environmental dynamics in aquatic systems, and suggests that, although no current anthropogenic sources were identified in the economically developed Lot-Garonne-Gironde fluvial-estuarine system, there is a non-negligible bioaccumulation in wild oysters at the estuary mouth. 
PY 2019
PD JUN
SO Environmental Chemistry
SN 1448-2517
PU CSIRO Publishing
VL 16
IS 4
UT 000473747800003
BP 229
EP 242
DI 10.1071/EN18226
ID 61684
ER

EF