Evidencing the Impact of Coastal Contaminated Sediments on Mussels Through Pb Stable Isotopes Composition
|Author(s)||Huy Dang Duc1, 2, Schafer Jörg3, Brach-Papa Christophe4, Lenoble Veronique1, Durrieu Gael1, Dutruch Lionel3, Chiffoleau Jean-Francois4, Gonzalez Jean-Louis5, Blanc Gerard3, Mullot Jean-Ulrich6, Mounier Stephane1, Garnier Cedric1|
|Affiliation(s)||1 : Univ Toulon & Var, PROTEE, EA 3819, F-83957 La Garde, France.
2 : Trent Univ, Water Qual Ctr, Peterborough, ON K9J 7B8, Canada.
3 : Univ Bordeaux, UMR EPOC 5805, CS50023, F-33615 Pessac, France.
4 : IFREMER, Ctr Atlantique, LBCM, F-44311 Nantes, France.
5 : IFREMER, Ctr Mediterranee, LBCM, F-83507 La Seyne Sur Mer, France.
6 : LASEM Toulon, F-83800 Toulon, France.
|Source||Environmental Science & Technology (0013-936X) (Amer Chemical Soc), 2015-10 , Vol. 49 , N. 19 , P. 11438-11448|
|WOS© Times Cited||48|
|Abstract||Heavily contaminated sediments are a serious concern for ecosystem quality, especially in coastal areas, where vulnerability is high due to intense anthropogenic pressure. Surface sediments (54 stations), 50 cm interface cores (five specific stations), river particles, coal and bulk Pb plate from past French Navy activities, seawater and mussels were collected in Toulon Bay (NW Mediterranean Sea). Lead content and Pb stable isotope composition have evidenced the direct impact of sediment pollution stock on both the water column quality and the living organisms, through the specific Pb isotopic signature in these considered compartments. The history of pollution events including past and present contaminant dispersion in Toulon Bay were also demonstrated by historical records of Pb content and Pb isotope ratios in sediment profiles. The sediment resuspension events, as simulated by batch experiments, could be a major factor contributing to the high Pb mobility in the considered ecosystem. A survey of Pb concentrations in surface seawater at 40 stations has revealed poor seawater quality, affecting both the dissolved fraction and suspended particles and points to marina/harbors as additional diffuse sources of dissolved Pb.|