Aspergillus terreus, Penicillium sp. and Bacillus sp. isolated from mangrove soil having laccase and peroxidase role in depolymerization of polyethylene bags

Eldin, Ahmed Mohy; Al-Sharnouby, Sohad Fouad Said; ElGabry, Khadiga; Ramadan, Amal Ibrahim

doi:10.1016/j.procbio.2022.04.030

Cited by 16 publications

(4 citation statements)

References 57 publications

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“…The formation of double bonds due to oxidation and hydrolysis microbial enzymes is considered an intermediate step in biodegradation and biofragmentation [ 63 ]. The results are consistent with the changes reported by Mohy Eldin et al after the degradation of polyethylene bags by Aspergillus terreus [ 21 ]. T-LDPE incubated with CPEF-6 had the presence of alkoxy and acyl C-O stretching bands, demonstrating the production of alcohols, ethers, acids, and esters.…”

Section: Discussionsupporting

confidence: 93%

“…This is consistent with our speculation that the decrease in pH value represents the production of organic acids. Except for the control group of U-LDPE, the other three data sets all showed peak fluctuations from 1690 to 1615 cm −1 , representing the formation of more C=C [ 21 ], as shown in Figure 7 . This indicates that both thermal treatment and biodegradation increased the double bonds of polyethylene in our experiments.…”

Section: Discussionmentioning

confidence: 99%

“…In particular, the weight of the LDPE bag samples treated with A. terreus was reduced by 24%, which proved its superiority. In this process, these two fungi also produced laccase and peroxidase [ 21 ]. These results suggest that fungi have great potential for LDPE degradation, making it critical to find more LDPE-degrading fungi.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of Low Density Polyethylene by the Fungus Cladosporium sp. Recovered from a Landfill Site

Gong

Jin

et al. 2023

JoF

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Low density polyethylene (LDPE) has been widely used commercially for decades; however, as a non-degradable material, its continuous accumulation has contributed to serious environmental issues. A fungal strain, Cladosporium sp. CPEF-6 exhibiting a significant growth advantage on MSM-LDPE (minimal salt medium), was isolated and selected for biodegradation analysis. LDPE biodegradation was analyzed by weight loss percent, change in pH during fungal growth, environmental scanning electron microscopy (ESEM), and Fourier transformed infrared spectroscopy (FTIR). Inoculation with the strain Cladosporium sp. CPEF-6 resulted in a 0.30 ± 0.06% decrease in the weight of untreated LDPE (U-LDPE). After heat treatment (T-LDPE), the weight loss of LDPE increased significantly and reached 0.43 ± 0.01% after 30 days of culture. The pH of the medium was measured during LDPE degradation to assess the environmental changes caused by enzymes and organic acids secreted by the fungus. The fungal degradation of LDPE sheets was characterized by ESEM analysis of topographical alterations, such as cracks, pits, voids, and roughness. FTIR analysis of U-LDPE and T-LDPE revealed the appearance of novel functional groups associated with hydrocarbon biodegradation as well as changes in the polymer carbon chain, confirming the depolymerization of LDPE. This is the first report demonstrating the capacity of Cladosporium sp. to degrade LDPE, with the expectation that this finding can be used to ameliorate the negative impact of plastics on the environment.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Biodegradation of Low Density Polyethylene by the Fungus Cladosporium sp. Recovered from a Landfill Site

Gong

Jin

et al. 2023

JoF

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“…The performance of microbial strains naturally occurred in the soil, activated sludge, farm sludge, and worms' excreta was effective to degrade the PE plastic waste without an inhibition of the microbial growth caused by the derived by-products from microbial degradation (Taghavi et al, 2021). The use of fungal laccases and peroxidases could be useful for depolymerization of PE plastic waste (Eldin et al, 2022). A potential of the oil seep-contaminated ecosystem for plastic degradation acquired following a long-term adaptation to petroleum compounds has been indicated the diversity of microbial community and the presence of polyethylene terephthalate (PET) degrading bacteria (Babazadeh et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Mass transfer kinetics and mechanisms of polyethylene degradation mediated by bacterial-fungal consortium

Fachrul

Fulazzaky

Rinanti

et al. 2023

Preprint

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Understanding the degradation rate of polyethylene (PE) plastic mediated by bacterial-fungal consortium (BFC) is important to ensure an effective design process of bioremediation technology. This study aims to investigate the degradation behavior of PE plastic waste mediated by the BFC colonies using the modified mass transfer factor models to get better understanding on the kinetics and mechanisms of internal, external and global mass transfer. The performance of rectangular reactor (RR) to degrade PE plastic reaching 61.5% of the efficiency shows an increased efficiency of 55.9% stimulated by the presence of BFC strains in the breakdown of complex PE molecules during the process of bioremediation. Trend in the variation of [kLa]d value viewed almost the same with that of [kLa]g value is higher than that of [kLa]f value during 150 days of the experiment hence the rate-limiting step of PE plastic waste degraded depends on the resistance of external mass transfer. Analysis of degradation efficiency pursuant to both the factors of internal and external mass transfer during the 150-day experimental period provides a new insight on the role of BFC strains to increase the performance of RR process contributing to advance the future bioremediation process of PE plastic waste.

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Role of Extremophilic Microbes in Removal of Microplastics

Pinar,

Rodríguez-Couto

2024

Trends in Biotechnology of Polyextremophiles

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Aspergillus terreus, Penicillium sp. and Bacillus sp. isolated from mangrove soil having laccase and peroxidase role in depolymerization of polyethylene bags

Cited by 16 publications

References 57 publications

Biodegradation of Low Density Polyethylene by the Fungus Cladosporium sp. Recovered from a Landfill Site

Biodegradation of Low Density Polyethylene by the Fungus Cladosporium sp. Recovered from a Landfill Site

Mass transfer kinetics and mechanisms of polyethylene degradation mediated by bacterial-fungal consortium

Role of Extremophilic Microbes in Removal of Microplastics

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