Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie - Normandie Universités, MNHN, SU, UA, CNRS, IRD, Hall Technologique 145 Chemin de la Crespinière ZA Les Fourches, BP 48 50130, Cherbourg-Octeville, France.
SMEL, Zac de Blainville, 50560, Blainville/Mer, France.
Chemosphere. 2020 Jan;239:124720. doi: 10.1016/j.chemosphere.2019.124720. Epub 2019 Sep 4.
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.
牺牲阳极阴极保护（GACP）通常用于保护港口环境中的浸没金属结构，特别是采用铝基阳极的 GACP。为了跟进之前在实验室进行的关于铝阳极的研究，我们在现场环境（在加莱港）进行了为期 42 个月的平行监测，在实验室进行了为期 18 个月的监测，以评估构成铝阳极的金属向沉积区的转移。在每次监测中，我们比较了两种水搅拌条件（弱搅拌和强搅拌），并使用不同的沉积物质量因素来评估这些释放金属的富集和潜在毒性效应。结果表明，与铝阳极的富集相比，铝阳极的溶解导致沉积物中锌的富集更大。这与阳极组成中这些元素的丰度形成对比，表明对于海洋生物而言，发现的锌水平存在潜在的毒性效应，尤其是在封闭区域。
