期刊
MICROBIOLOGICAL RESEARCH
卷 267, 期 -, 页码 -出版社
ELSEVIER GMBH
DOI: 10.1016/j.micres.2022.127251
关键词
Microplastics; Decomposition; Plastic degradable microorganisms; Bacteria; Fungi
类别
Microorganisms capable of degrading polyethylene (PE) and polypropylene (PP) were isolated from waste landfills. The presence of a biofilm and surface changes on the polymer pellets were confirmed, with the greatest changes observed in PP incubated with bacteria. This study highlights the potential of bacteria and fungi for PP and PE degradation, respectively.
Microorganisms degrade microplastics, but their potential is still not fully exploited, e.g., due to inadequate selection of microorganisms. We developed an effective selection method of microorganisms capable of poly-ethylene (PE) and polypropylene (PP) degradation and assessed the scale of polymer degradation by microbial populations.We isolated seven bacterial strains (three Priestia megaterium strains, Klebsiella pneumoniae, Pseudomonas flu-orescens, Enterobacter ludwigii, Chryseobacterium sp.) and seven fungal strains (four Fusarium spp., two Lecanicil-lium spp. and Trichoderma sp.) with PE degradation potential, as well as seven bacterial strains (five Serratia marcescens and two Enterobacter spp.) and six fungal strains (four Aspergillus spp., Fusarium oxysporum and Penicillium granulatum) with PP degradation ability. Scanning electron microscopy (SEM) analysis confirmed the presence of a biofilm and revealed surface changes in both PE and PP pellets, but the greatest changes (microcracks and corrugations) were observed for PP incubated with bacteria. Fourier transform infrared (FTIR) spectroscopy confirmed the structural changes on the studied polymer surfaces.In conclusion, the isolation of plastic-degrading bacteria and fungi from waste landfills represents an effective strategy for the collection of microorganisms with high potential for PE and PP degradation. The bacteria and fungi revealed better potential for PP degradation and PE degradation, respectively.
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