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Isolation and Identification of Four Strains of Bacteria with Potential to Biodegrade Polyethylene and Polypropylene from Mangrove
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Researchers screened mangrove sediment and surface water bacteria for the ability to biodegrade polyethylene and polypropylene microplastics, successfully isolating four candidate strains. The identified bacteria showed measurable plastic degradation activity, highlighting mangrove ecosystems as a source of novel plastic-degrading microorganisms.
With the rapid growth of global plastic production, the degradation of microplastics (MPs) has received widespread attention, and the search for efficient biodegradation pathways has become a hot topic. The aim of this study was to screen mangrove sediment and surface water for bacteria capable of degrading polyethylene (PE) and polypropylene (PP) MPs. In this study, two strains of PE-degrading bacteria and two strains of PP-degrading candidate bacteria were obtained from mangrove, named Pseudomonas sp. strain GIA7, Bacillus cereus strain GIA17, Acinetobacter sp. strain GIB8, and Bacillus cereus strain GIB10. The results showed that the degradation rate of the bacteria increased gradually with the increase in degradation time for 60 days. Most of the MP-degrading bacteria had higher degradation rates in the presence of weak acid. The appropriate addition of Mg2+ and K+ was favorable to improve the degradation rate of MPs. Interestingly, high salt concentration inhibited the biodegradation of MPs. Results of scanning electron microscopy (SEM), atomic force microscopy (AFM), and Fourier-transform infrared spectroscopy (FTIR) indicated the degradation and surface changes of PP and PE MPs caused by candidate bacteria, which may depend on the biodegradation-related enzymes laccase and lipase. Our results indicated that these four bacterial strains may contribute to the biodegradation of MPs in the mangrove environment.
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Two bacterial species isolated from mangrove sediments in Malaysia were found to partially degrade polypropylene plastic, as measured by weight loss and surface changes after incubation. Mangrove-associated bacteria capable of degrading plastics could have potential applications in biological plastic remediation.
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Ten bacterial strains isolated from mangrove sediments in North Sumatra were screened for microplastic degradation, with three promising isolates showing growth on LDPE, HDPE, PET, PP, and PS substrates, identifying mangrove bacteria as a potential source of plastic-degrading microbes.
Bioremediation of microplastic using microbes isolated from mangrove sediments / Helen Shnada Auta
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Twenty-two bacteria isolated from plastic-contaminated mangrove sediments were screened for the ability to degrade common plastic polymers including PE, PP, PET, and PS, with nine isolates showing degradation activity. The findings suggest that mangrove ecosystems harbor microbes with potential for bioremediation of plastic pollution in marine and coastal environments.
Bacterial degradation of polyethylene and polypropylene microplastics in a mangrove ecosystem
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Researchers isolated bacteria from a mangrove ecosystem that can break down polyethylene and polypropylene microplastics, achieving measurable weight loss over 60 days. The bacteria produced enzymes that caused visible surface degradation of the plastic particles, confirmed through microscopy and chemical analysis. While the degradation rates were modest, the study demonstrates that naturally occurring bacteria in coastal environments have the potential to help address microplastic pollution.
Screening of Bacillus strains isolated from mangrove ecosystems in Peninsular Malaysia for microplastic degradation
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