期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 785, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.147413
关键词
Bio-based plastics; Microplastics; Seawater; Freshwater; Bacterial communities; HDPE; PLA; PHBV
资金
- Technical University of Liberec through PURE GP [2019-8003]
- Research Infrastructures NanoEnviCz by Ministry of Education, Youth and Sports of the Czech Republic [LM2018124]
This study compared the impacts of different bio-based plastics on natural bacterial communities in seawater and freshwater, revealing significant differences between microbial communities forming biofilms on different plastics and planktonic bacteria. Different bacterial groups were found to dominate on different bio-based plastics in both marine and freshwater environments.
Bio-based plastics, produced from renewable biomass sources, may contribute to lowering greenhouse gases and the demand for fossil resources. However, their environmental fate is not well understood. Here, we compared the impacts of industrially produced granules (G) and micro-debris (MD) from three pristine bio-based plastics: high-density polyethylene (HDPE), polylactic acid (PLA) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) on natural bacterial communities in seawater and freshwater using metagenomics. After one month, we found a dissimilarity between the microbial communities forming a biofilm on the plastics and planktonic bacteria. Further, different bacterial groups became dominant on different bio-based plastics, i.e. Burkholderiaceae, Solimonadaceae, Oleiphilaceae, and Sneathiellaceae on HDPE and Alteromonadaceae on PLA and Rhodobacteraceae on PHBV in seawater, and Beijerinckiaceae and Chitinophagaceae on HDPE, Microtrichaceae on PLA and Caulobacteraceae and Sphingomonadaceae on PHBV in freshwater. Variovorax, Albimonas and Sphingomonas genera were recorded on bio-based plastics in both seawater and freshwater. This study describes how different bio-based plastic materials and granule sizes influence the development of natural bacterial communities. (c) 2021 Elsevier B.V. All rights reserved.
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