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New Plastitar Record for the Mediterranean Sea: Characterization of Plastics and Tar from the Salento Peninsula (Ionian Sea)

Preprints.org 2024
Silvia Fraissinet, Emanuele Mancini, Chiara Funiati, Claudio Martino, Giovanni De Benedetto, Chiara Roberta Girelli, Francesco Paolo Fanizzi, Genuario Belmonte, Stefano Piraino

Summary

Researchers documented a new occurrence of Plastitar -- aggregates of tar, microplastics, and natural materials -- on the Salento Peninsula coastline of the Ionian Sea, characterizing the plastic and tar components using spectroscopic and chemical analysis. The study adds to Mediterranean records of this composite pollution form and discusses its ecological implications for coastal and marine biota.

Polymers

The various forms of anthropogenic pollution are regarded as a serious threat to marine coastal areas. The overproduction and mismanagement of petroleum derivatives, such as tar and plastics, has resulted in a significant correlation between these two pollutants. The aggregation of tar, microplastics (MPs), and natural materials can create Plastitar blocks, which are common in coastal areas. These raise concern about the undeniable negative impact on the marine ecosystem and associate biota and serve as a recognizable and understandable indication of environmental decline. Here, the composition of the 11 Plastitar blocks collected on the Ionian side of the Apulia region (Italy) was characterized both in tar and plastics using nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared (FTIR) spectroscopy, respectively. Of the 250 particles extracted from the tar, 208 were identified as plastics, predominantly Polyethylene. The majority of these were in the form of pellets (90%), with fragments accounting for 5% and films and filaments representing the remaining 5%. This study provides new data that can be used to enhance the understanding of the distribution and baseline information about this novel form of pollution in Italian waters.

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