Congratulations to Nicolas Layglon (CEM) who defended his thesis on September 3, 2020 in Toulon.

On the following topic :
"Behaviour of metallic trace elements during the resuspension of contaminated sediments in coastal areas
 
Under the direction of
✞Cédric GARNIER, Senior Lecturer, University of Toulon, Co-Director
Stéphane MOUNIER, Senior Lecturer, University of Toulon, Co-Director
Véronique LENOBLE, Senior Lecturer, University of Toulon, Co-Director
Benjamin MISSON, Senior Lecturer, University of Toulon, Co-supervisor

before a jury composed of

Mr. Gabriel BILLON, University Professor, LASIR, Rapporteur
Mrs. Chrystelle BANCON-MONTIGNY, Senior Lecturer, HSM, Rapporteur
Mrs. Filella MONTSERRAT, University Professor, LGE, Examiner
Mr. Ricardo RISO, Pr. Des Universités, LEMAR, Examiner
Mr. Dario OMANOVIĆ, Senior Researcher, RBI, Croatia, Examiner
Mr. Jean-Ulrich MULLOT, Chief Pharmacist, LASEM Toulon, Guest
✞M. Cédric GARNIER, Senior Lecturer, University of Toulon, Co-Director
Mr. Stéphane MOUNIER, Senior Lecturer, University of Toulon, Co-Director
Mrs. Véronique LENOBLE, Senior Lecturer, University of Toulon, Co-Director
Mr. Benjamin MISSON, Senior Lecturer, University of Toulon, Co-supervisor.

Abstract

The metallic trace elements arriving in the marine environment accumulate naturally in the sediments. In port areas, these sediments can be re-suspended in the water column by natural phenomena (swells, storms...) and/or anthropogenic (maritime traffic, dredging activity). In particular, the north-western Mediterranean represents a place of significant maritime exchanges, generating frequent resuspension events of anthropic origin, while being little subject to the influence of natural phenomena related to tides. In this context, the objectives of this thesis were to study the potential for remobilization of trace elements during resuspension events in order to provide knowledge that will contribute to better predicting and thus better managing the associated risk. The transfer kinetics of ETMMs, studied during laboratory experiments, were specified in the light of the variability of port contexts. The transfer of ETMMs during the first 5 days of resuspension appeared to be determined mainly by abiotic processes. The understanding of these processes allowed to partially explain the field observations carried out during an impact study of a dredging operation.