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2021-06-25 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Delacuvellerie Alice , Benali Samira , Cyriaque Valentine , Moins Sébastien , Raquez Jean Marie , Gobert Sylvie, Wattiez Ruddy , "Microbial biofilm composition and polymer degradation of compostable and non-compostable plastics immersed in the marine environment" in Journal of Hazardous Materials

  • Edition : Elsevier (Netherlands)
  • Codes CREF : Biochimie (DI3112), Biologie moléculaire (DI3111), Microbiologie et protistologie [bacteriol.,virolog.,mycolog.] (DI3130)
  • Unités de recherche UMONS : Protéomie et Microbiologie (S828)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
Texte intégral :

Abstract(s) :

(Anglais) Different plastic types considered as compostable are found on the market such as petro-based (e.g., polybutylene adipate terephthalate (PBAT)) or bio-based plastics (e.g., polylactic acid, (PLA)). Even if their degradation has been confirmed in industrial compost conditions, investigation of their degradation in natural marine environment has been limited. To better understand biodegradation into natural marine environment, commercial compostable (PBAT, semi-crystalline and amorphous PLA) and non-compostable polymers (low density polyethylene, polystyrene, polyethylene terephthalate, polyvinyl chloride) were submerged in situ on the sediment and in the water column in the Mediterranean Sea. These samples were studied by chemical and microbiological approaches. After 82 days of immersion, no significant bacterial degradation of the different polymers was observed, except some abiotic alterations of PBAT and LDPE probably due to a photooxidation process. However, after 80 days in an enrichment culture containing plastic films as a main carbon source, Marinomonas genus was specifically selected on the PBAT and a weight loss of 12% was highlighted. A better understanding of the bacterial community colonizing these plastics is essential for an eco-design of new biodegradable polymers to allow a rapid degradation in aquatic environment.

Identifiants :
  • FNRS : FC 23347

Mots-clés :
  • (Anglais) Plastisphere
  • (Anglais) Sequencing
  • (Anglais) Enrichment culture
  • (Anglais) Bacterial community
  • (Anglais) Mediterranean Sea