Transfer of elements released by aluminum galvanic anodes in a marine sedimentary compartment after long-term monitoring in harbor and laboratory environments

TitreTransfer of elements released by aluminum galvanic anodes in a marine sedimentary compartment after long-term monitoring in harbor and laboratory environments
Type de publicationJournal Article
Year of Publication2020
AuteursCaplat, C, Basuyaux, O, Pineau, S, Deborde, J, Grolleau, AM, Leglatin, S, Mahaut, M-L
JournalChemosphere
Volume239
Pagination124720
ISSN0045-6535
Mots-clésAluminum, galvanic anode, Harbor, Marine sediments, Quality index, Zinc
Résumé

Cathodic protection by galvanic anodes (GACP) is often used to protect immerged metallic structures in harbor environments, especially GACP employing aluminum-based anodes. To follow a previous study that was performed in a laboratory on Al-anode, two monitoring periods were performed in parallel, one in an in situ environment (in the Port of Calais) for 42 months and the other in a laboratory for 18 months, to evaluate the transfer of metals constituting the Al-anode towards the sedimentary compartment. During each monitoring, two conditions of agitation of water (weak and strong) were compared, and different factors of sediment quality were used to assess the enrichment and potential toxic effects of these released metals. The results showed that the dissolution of Al-anode-induced a greater Zn enrichment of sediment than an Al enrichment. This is in contrast with the abundance of these elements present in the composition of the anode and suggested a potential toxic effect for marine organisms with regards to the discovered Zn level, especially in confined areas.

URLhttp://www.sciencedirect.com/science/article/pii/S0045653519319502
DOI10.1016/j.chemosphere.2019.124720
Catégorie HCERES
ACL - Articles dans des revues à comité de lecture
Publication coopération et recherche SUD
Non