Disintegration half-life of biodegradable plastic films on different marine beach sediments

PeerJ

article

Andreas Eich¹  Miriam Weber¹  Christian Lott¹ 

[1]HYDRA Marine Sciences GmbH

关键词: Biodegradation;    Biodegradable plastic;    Sediment;    Marine;    Pollution;    Plastic;    Degradation;    PHB;    Polyhydroxybutyrate;    Half-life;   

DOI  :  10.7717/peerj.11981

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

1,000 µm: 428 days). We assume that the higher surface-to-volume ratio in fine sediment compared to coarse sediment led to a higher bacterial abundance and thus to faster disintegration rates. In a follow-up experiment, the <500 µm fraction of sediment from four different beaches around Isola d’Elba, Italy, was used to test plastic disintegration as above. Additionally, polyhydroxybutyrate (PHB, MIREL P5001) was used as a positive control and high-density polyethylene (HD-PE) as a negative control. No disintegration was observed for HD-PE. Mater-Bi HF03V and PHB disintegrated significantly differently on sediment from different sites, with half-lives of Mater-Bi HF03V ranging from 72 to 368 days and of PHB from 112 to 215 days. Here, the half-life was shortest on slightly coarser sediment and at potentially anthropogenically impacted sites. We assume that the effect of the grain size on the disintegration rate was masked by other parameters influencing the microbial community and activity. Understanding the parameters driving biodegradation is key to reliably report the range of disintegration rates occurring under the various conditions in different ecosystems.

【 授权许可】

CC BY