Pierre-Adrien Rivier
Forsker
(+47) 920 10 480
pierre-adrien.rivier@nibio.no
Sted
Ås - Bygg H7
Besøksadresse
Høgskoleveien 7, 1433 Ås
Forfattere
Paloma Sánchez-Argüello Gema Sáez-Salto Alice Budai Pierre-Adrien Rivier Simon Weldon Antonio Martín-EstebanSammendrag
Compost application is a widely recommended practice to maintain and improve soil fertility. However, such a practice could be a main entry path for plastic into soil. Accordingly, in the present work, two different compost samples, obtained with and without biochar, were analyzed to investigate how composting can affect the presence of microplastics (MPs). The substrate of both samples (consisting of a mixture of household food waste and animal manure) was also analyzed for comparative purposes. Samples were processed by oxidation, flotation, and filtration. MPs on the filters were observed, counted, and size-calibrated using both a stereomicroscope and an inverted microscope. MPs larger than 1 mm were further characterized by attenuated total reflectance Fourier-transformed infrared spectroscopy (ATR-FTIR). In parallel, mesoplastics (0.5–2 cm) were recovered from substrate and compost and extracted in methanol for testing in vitro cytotoxicity. The estimated concentration of MPs ranged from 820 to 1340 fragments/kg of dry sample, depending upon the sample. Three polymers represented the totality of identified plastic items: polyethylene (PE, including both low and high density), polyethylene terephthalate (PET), and polypropylene (PP) in order of abundance. Nevertheless, cytotoxicity was only observed in mesoplastic extracts from the substrate and could not be attributed to the identified plastic items themselves, suggesting that cytotoxic effects could have been caused by contaminants adsorbed to plastics or by the leaching of plastic additives during the extraction process. In summary, the composting process reduced the cytotoxicity of plastic extracts and the presence of MPs in compost, which could be attributed to the fragmentation of plastics.
Forfattere
Igor A. Yakovlev Thiago Inagaki Junbin Zhao Pierre-Adrien Rivier Hege Særvold Steen Inger Heldal Daniel Rasse Jihong Liu Clarke Nicholas ClarkeSammendrag
Det er ikke registrert sammendrag
Sammendrag
presentation about circular economical projects in NIBIO
Divisjon for miljø og naturressurser
AgroComposit
AgroComposit: Biochar-compost composites for supporting site-specific soil agro-ecosystem functions and climate change mitigation
Divisjon for miljø og naturressurser
AgroComposit
AgroComposit: Kompositter av biokull og kompost for å fremme jordas stedsspesifikke agroøkosystemfunksjoner og oppnå utslippskutt
