Article (Scientific journals)
Microbial biofilm composition and polymer degradation of compostable and non-compostable plastics immersed in the marine environment
Delacuvellerie, Alice; Benali, Samira; Cyriaque, Valentine et al.
2021In Journal of Hazardous Materials
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Keywords :
[en] Plastisphere; [en] Sequencing; [en] Enrichment culture; [en] Bacterial community; [en] Mediterranean Sea
Abstract :
[en] 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.
Disciplines :
Biochemistry, biophysics & molecular biology
Biotechnology
Zoology
Author, co-author :
Delacuvellerie, Alice ;  Université de Mons > Faculté des Sciences > Service de Protéomie et Microbiologie
Benali, Samira  ;  Université de Mons > Faculté des Sciences > Service des Matériaux Polymères et Composites
Cyriaque, Valentine 
Moins, Sébastien ;  Université de Mons > Faculté des Sciences > Service des Matériaux Polymères et Composites
Raquez, Jean Marie  ;  Université de Mons > Faculté des Sciences > Service des Matériaux Polymères et Composites
Gobert, Sylvie
Wattiez, Ruddy  ;  Université de Mons > Faculté des Sciences > Service de Protéomie et Microbiologie
Language :
English
Title :
Microbial biofilm composition and polymer degradation of compostable and non-compostable plastics immersed in the marine environment
Publication date :
25 June 2021
Journal title :
Journal of Hazardous Materials
ISSN :
0304-3894
Publisher :
Elsevier, Netherlands
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S828 - Protéomie et Microbiologie
Research institute :
R100 - Institut des Biosciences
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since 10 January 2022

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