[en] The best-selling compostable plastics, polylactic acid (PLA) and polybutylene adipate-co-terephthalate (PBAT), can accidentally end up in the marine environment due to plastic waste mismanagement. Their degradation and colonization by microbial communities are poorly documented in marine conditions. To better understand their degradation, as well as the dynamics of bacterial colonization after a long immersion time (99, 160, and 260 days), PBAT, semicrystalline, and amorphous PLA films were immersed in a marine aquarium. Sequencing and chemical analyses were used in parallel to characterize these samples. Despite the variation in the chemical intrinsic parameters of these plastics, their degradation remains very slow. Microbial community structure varied according to the immersion time with a high proportion of Archaea. Moreover, the plastisphere structure of PBAT was specific. A better understanding of compostable plastic degradability is crucial to evaluate their impact on ecosystems and to eco-design new recyclable plastics with optimal degradation properties.
Disciplines :
Microbiology
Author, co-author :
Delacuvellerie, Alice; Proteomics and Microbiology department, University of Mons, 20 place du parc, 7000 Mons, Belgium
Brusselman, Axelle ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Chemical Oceanography Unit (COU) ; Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Cyriaque, Valentine; Proteomics and Microbiology department, University of Mons, 20 place du parc, 7000 Mons, Belgium, Section of Microbiology, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø, 1, Bygning, 1-1-215, Denmark
Benali, Samira; Polymer and Composite Materials Department, University of Mons, 15 Avenue Maistriau, 7000 Mons, Belgium
Moins, Sébastien; Polymer and Composite Materials Department, University of Mons, 15 Avenue Maistriau, 7000 Mons, Belgium
Raquez, Jean-Marie; Polymer and Composite Materials Department, University of Mons, 15 Avenue Maistriau, 7000 Mons, Belgium
Gobert, Sylvie ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Wattiez, Ruddy; Proteomics and Microbiology department, University of Mons, 20 place du parc, 7000 Mons, Belgium. Electronic address: ruddy.wattiez@umons.ac.be
Language :
English
Title :
Long-term immersion of compostable plastics in marine aquarium: Microbial biofilm evolution and polymer degradation.
This study was funded by the Fund for Scientific Research (F.R.S.-FNRS) FC 23347 . We thank the Aquarium-Museum of Liège and particularly Marie Bournonville and her colleagues. Samira Benali acknowledges support from the - European Regional Development Fund (ERDF-FEDER) for general support in the frame of LCFM-BIOMAT. Jean-Marie Raquez is an F.R.S.-FNRS Research Associate, and Valentine Cyriaque is a F.R.S.-FNRS scientific collaborator.This study was funded by the Fund for Scientific Research (F.R.S.-FNRS) FC 23347. We thank the Aquarium-Museum of Liège and particularly Marie Bournonville and her colleagues. Samira Benali acknowledges support from the - European Regional Development Fund (ERDF-FEDER) for general support in the frame of LCFM-BIOMAT. Jean-Marie Raquez is an F.R.S.-FNRS Research Associate, and Valentine Cyriaque is a F.R.S.-FNRS scientific collaborator.
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