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SWASV speciation of Cd, Pb and Cu for the determination of seawater contamination in the area of the Nicole shipwreck (Ancona coast, Central Adriatic Sea)
► Cd, Pb and Cu concentration in the seawater surrounding the shipwreck of M/V Nicole. ► Cd, Pb and Cu speciation (soluble/insoluble fractionation). ► Metal contamination of coastal bottom seawater due to the presence of the hulk. ► Cd and Pb dissolved contents of the contaminated area exceed the Italian legal limits.
The study reports for the first time on the heavy metal contamination of the waters surrounding a shipwreck lying on the sea floor. Square wave anodic stripping voltammetry has been used for a survey of the total and dissolved Cd, Pb and Cu contents of the seawater at the site of the sinking of the Nicole M/V (Coastal Adriatic Sea, Italy). Results show that the hulk has a considerable impact as regards all three metals in the bottom water, especially for the particulate fraction concentrations, which increased by factors of ∼9 (Cd), ∼3 (Pb) and ∼5 (Cu). The contaminated plume extended downstream for about 2miles. Much lower contamination was observed for dissolved bottom concentrations; nevertheless Pb (0.56±0.03nmol/L) is higher than the Italian legal limits established for 2015 and Cd (0.23±0.03nmol/L) is very close the limit of Cd will be exceeded if the hulk is not removed.