Microplastics in Sediments from a Sandy Beach in Costa Nova (Aveiro, Portugal)

Abstract

The main objective of this study is to perform an approximation on the microplastic pollution on a sandy beach in Costa Nova (Portugal), focused on longitudinal and cross-sectional transects. The results showed a scarce variability in data, with median concentrations ranging from 142 to 356 p/kg d.w. and 211 to 270 p/kg d.w. in cross-sectional and longitudinal transects, respectively. The predominant morphology was microspheres, which accounted for more than 90% in all samples analysed, whereas the most abundant microplastics were <200 µm in size. Microplastic contamination was higher than in other Portuguese beaches despite the moderate–low touristic pressure in Costa Nova, which led us to consider the intense commercial activity of the nearby port and the Canary and Portuguese currents as possible drivers of microplastic pollution in this area. However, this study highlights the disparity in data caused by different methodologies used when similar areas are analysed.