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Types, occurrence and distribution of microplastics in sediments from the northern Tyrrhenian Sea
Summary
Microplastic contamination was found in sediments along a 31-km transect from a Tuscan port to Elba Island in the northern Tyrrhenian Sea, with filaments being the dominant type. The contamination was present near ports as well as in offshore locations, indicating widespread dispersal beyond human activity hotspots.
This is the first survey to investigate microplastic contamination in the Northern Tyrrhenian seafloor, along a 31 km-long transect from the port of Piombino (Tuscany) to the port of Portoferraio (Elba Island). Plastics extracted from 58 sediment samples were counted and identified by Fourier-transform infrared spectroscopy (FTIR). Plastic pollution occurred in sites closer to ports as well as in offshore stations. Microplastics (1-5 mm) accounted for over 80% of particles. For all samples, the dominant microplastic type was filaments, followed by fragments and films. Six polymers were identified: nylon, polyurethane, polyethylene, and polyethylene terephtalate were the most common. This part of the Tyrrhenian Sea is a busy shipping route connecting the mainland to the Elba Island, with thousands cargo and passenger ships passing by per year. Our data constitute a baseline for microplastic research in the Tyrrhenian seafloor.