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Cd transfers during marine sediment resuspension over short and long-term period: Associated risk for coastal water quality

Abstract : Cadmium (Cd) is a highly toxic metal, regularly monitored uniformly for water quality across 21 Europe, but scarcely for sediments. This study was designed to compare the kinetics of Cd 22 remobilization and the amplitude of its transfers with different marine sediments. The results 23 showed a highly reproducible transfer kinetics. Dissolved Cd was strongly and quickly 24 removed from the dissolved phase (from 5 minutes up to 7 hours). Then, the dissolved Cd 25 concentration increased progressively to reach a maximal value after two weeks of mixing. 26 The influence of the resuspension intensity representing light wind-induced resuspension up 27 to dredging operations was observed after 2 weeks. The intensity of the sediment resuspension 28 clearly impacted the amplitude of Cd remobilization, dissolved Cd ranging from a few ngL-1 29 to few hundreds of ngL-1 , exceeding the maximal dissolved Cd concentration accepted by the 30 European Union Water Framework Directive (WFD-2008/105 32 / EC).
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https://hal.archives-ouvertes.fr/hal-03678347
Contributor : Stéphane Mounier Connect in order to contact the contributor
Submitted on : Wednesday, May 25, 2022 - 12:08:02 PM
Last modification on : Saturday, June 25, 2022 - 3:17:17 AM

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Nicolas Layglon, Véronique Lenoble, Longo Louis, D Onofrio, Stéphane Mounier, et al.. Cd transfers during marine sediment resuspension over short and long-term period: Associated risk for coastal water quality. Marine Pollution Bulletin, Elsevier, 2022, 180, pp.113771. ⟨10.1016/j.marpolbul.2022.113771⟩. ⟨hal-03678347⟩

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