Prospective study on plastic waste in the soil of urban and rural areas of Hauts de France
Résumé
Plastic waste and its fragments (microplastics; MP < 5 mm) represent a global, persistent and omnipresent threat to ecosystems. Their sources, their transfers, their storage and then their fate are still poorly understood, particularly in soils. To contribute to a better understanding of these processes, soil samples were collected from 37 sites along the Scarpe Canal (urban area) and the Planquette River (rural area) in the north of France. Samples were sieved at 1 mm to collect large microplastics (LMP; 1-5 mm). The extracted particles were analyzed using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Preliminary results indicate that 35 of the 37 sites are contaminated with large microplastics, with concentrations up to more than 80 LMP/kg or 4000 LMP/m2. Urban sites have concentrations on average 5 times greater than rural sites. More than half of the microplastics observed are polyethylene films and fragments.
Domaines
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