CNRS, Sorbonne Université, UMR 7621, Laboratoire d'Océanographie Microbienne (LOMIC), 1 Avenue Fabre, F-66650 Banyuls sur mer, France; Université Bretagne Sud, Institut de Recherche Dupuy de Lôme (IRDL), UMR CNRS 6027, 56321 Lorient, France.
CNRS, Sorbonne Université, UMR 7621, Laboratoire d'Océanographie Microbienne (LOMIC), 1 Avenue Fabre, F-66650 Banyuls sur mer, France; SAS Plastic@Sea, Observatoire Océanologique de Banyuls, France.
J Hazard Mater. 2024 Jan 15;462:132782. doi: 10.1016/j.jhazmat.2023.132782. Epub 2023 Oct 14.
Over recent years, biodegradable polymers have been proposed to reduce environmental impacts of plastics for specific applications. The production of polyhydroxyalkanoates (PHA) by using diverse carbon sources provides further benefits for the sustainable development of biodegradable plastics. Here, we present the first study evaluating the impact of physical, chemical and biological factors driving the biodegradability of various tailor-made PHAs in the marine environment. Our multidisciplinary approach demonstrated that the chemical structure of the polymer (i.e. the side chain size for short- vs. medium-chain PHA) which was intrinsically correlated to the physico-chemical properties, together with the specificity of the biofilm growing on plastic films (i.e., the associated 'plastisphere') were the main drivers of the PHA biodegradation in the marine environment.
近年来，人们提出使用可生物降解聚合物来减少塑料在特定应用中的环境影响。利用各种碳源生产聚羟基烷酸酯 (PHA) 为可生物降解塑料的可持续发展提供了进一步的好处。在这里，我们首次研究了影响各种定制 PHAs 在海洋环境中生物降解性的物理、化学和生物因素。我们的多学科方法表明，聚合物的化学结构（即短链与中链 PHA 的侧链大小）与其物理化学性质内在相关，以及在塑料薄膜上生长的生物膜的特异性（即相关的“塑料圈”）是 PHA 在海洋环境中生物降解的主要驱动因素。
