Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

Passos, Thayse Marques; Marconato, José Carlos; Franchetti, Sandra Mara Martins

doi:10.1590/0104-1428.1432

Cited by 10 publications

(9 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fig 5 presents lignolytic enzyme activities during five months in semisolid Radha modified media in the presence of LDPE sheets. Enzymes capable of lignin degradation have also been reported to participate in PE biodeterioration, including Lac, MnP and LiP [ 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

et al. 2018

View full text Add to dashboard Cite

Low-density polyethylene (LDPE) waste generates an environmental impact. To achieve the most suitable option for their degradation, it is necessary to implement chemical, physical and biological treatments, as well as combining procedures. Best treatment was prognosticated by Plackett-Burman Experimental Design (PB), evaluating five factors with two levels (0.25 mM or 1.0 gL-1 glucose, 1.0 or 2.0 mM CuSO4, 0.1 or 0.2 mM ABTS [2, 20-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)], pH 4.5 ± 0.2 or 7.0 ± 0.2 and 30 or 90 day incubation), which was reproduced for 150 days. Therefore, PB identified a sequential treatment (plasma followed by fungus) for partial LDPE biodeterioration. Sheets were pretreated with glow discharge plasma (O2, 3.0 x 10−2 mbar, 600 V, 6 min.), followed by Pleurotus ostreatus biodeterioration. Fungus growth, colonization percentage, and pigment generation followed. Laccase (Lac), manganese peroxidase (MnP) and lignin peroxidase (LiP) activities were appraised. Additionally, contact angle (CA), functional group presence and changes and carbonyl and vinyl indices (Fourier transformed infrared spectroscopy) were evaluated. LDPE surface changes were assessed by Young’s modulus, yield strength, scanning electronic microscopy (SEM), Fourier transformed infrared spectroscopy (FTIR) and atomic force microscopy (AFM). Plasma discharge increased hydrophilicity, decreasing CA by 76.57% and increasing surface roughness by 99.81%. P. ostreatus colonization was 88.72% in 150 days in comparison with untreated LDPE (45.55%). After this treatment carbonyl groups (C = O), C = C insaturations, high hydrophilicity CA (16 ± 4) °, and low surface roughness (7 ± 2) nm were observed. However, the highest Lac and LiP activities were detected after 30 days (Lac: 2.817 U Lac g-1 and LiP: 70.755 U LiP g-1). In addition, highest MnP activity was observed at day 120 (1.097 U MnP g-1) only for P. ostreatus treated LDPE. Plasma favored P. ostreatus adsorption, adherence, growth and colonization (88.72%), as well as partial LDPE biodeterioration, supported by increased hydrophilicity and presence of specific functional chemical groups. The approximate 27% changes in LDPE physical properties support its biodeterioration.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Polyethylene main photo-oxidation products are carbonyl and vinyl groups [ 7 , 50 ]. In general, many authors describe, presence of microorganisms results in increased carbonyl groups or double bond reduction [ 30 , 33 , 51 – 53 ]. Presence of carbonyl groups from the beginning of the experiment is noteworthy ( Table 4 ).…”

Section: Discussionmentioning

confidence: 99%

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

et al. 2018

View full text Add to dashboard Cite

show abstract

“…White and amorphous LDPE microplastic granules, 5 mm nominal size, (Sigma-Aldrich, Singapore) were used in this study. The LDPE film was prepared according to a modified method [29]. The 0.12 mm polymeric film was prepared by melting 0.2 g of LDPE polymer between aluminum foil in a hydraulic press (Carver, Wabash, IN, USA) at a temperature of 180 • C and under 55.3 kgf/cm 2 of pressure for 5 min.…”

Section: Preparation Of Ldpe Filmmentioning

confidence: 99%

Low-Density Polyethylene Film Biodegradation Potential by Fungal Species from Thailand

Khruengsai

Sripahco

Pripdeevech

2021

JoF

View full text Add to dashboard Cite

Accumulated plastic waste in the environment is a serious problem that poses an ecological threat. Plastic waste has been reduced by initiating and applying different alternative methods from several perspectives, including fungal treatment. Biodegradation of 30 fungi from Thailand were screened in mineral salt medium agar containing low-density polyethylene (LDPE) films. Diaporthe italiana, Thyrostroma jaczewskii, Collectotrichum fructicola, and Stagonosporopsis citrulli were found to grow significantly by culturing with LDPE film as the only sole carbon source compared to those obtained from Aspergillus niger. These fungi were further cultured in mineral salt medium broth containing LDPE film as the sole carbon source for 90 days. The biodegradation ability of these fungi was evaluated from the amount of CO2 and enzyme production. Different amounts of CO2 were released from D. italiana, T. jaczewskii, C. fructicola, S. citrulli, and A. niger culturing with LDPE film, ranging from 0.45 to 1.45, 0.36 to 1.22, 0.45 to 1.45, 0.33 to 1.26, and 0.37 to 1.27 g/L, respectively. These fungi were able to secrete a large amount of laccase enzyme compared to manganese peroxidase, and lignin peroxidase enzymes detected under the same conditions. The degradation of LDPE films by culturing with these fungi was further determined. LDPE films cultured with D. italiana, T. jaczewskii, C. fructicola, S. citrulli, and A. niger showed weight loss of 43.90%, 46.34%, 48.78%, 45.12%, and 28.78%, respectively. The tensile strength of LDPE films cultured with D. italiana, T. jaczewskii, C. fructicola, S. citrulli, and A. niger also reduced significantly by 1.56, 1.78, 0.43, 1.86, and 3.34 MPa, respectively. The results from Fourier transform infrared spectroscopy (FTIR) reveal an increasing carbonyl index in LDPE films culturing with these fungi, especially C. fructicola. Analysis of LDPE films using scanning electron microscopy (SEM) confirmed the biodegradation by the presence of morphological changes such as cracks, scions, and holes on the surface of the film. The volatile organic compounds (VOCs) emitted from LDPE films cultured with these fungi were analyzed by gas chromatography-mass spectrometry (GC-MS). VOCs such as 1,3-dimethoxy-benzene, 1,3-dimethoxy-5-(1-methylethyl)-benzene, and 1,1-dimethoxy-decane were detected among these fungi. Overall, these fungi have the ability to break down and consume the LDPE film. The fungus C. fructicola is a promising resource for the biodegradation of LDPE which may be further applied in plastic degradation systems based on fungi.

show abstract

“…Unlike observed by Passos, Marconato and Franchetti who obtained completely homogeneous micrographs for pure PHBV. Weng, Wang and Wang observed uniform micrographs for different matrixes of PHBV with variation in HV content.…”

Section: Resultsmentioning

confidence: 96%

Assessment of the Morphology and Interaction of PHBV/Clay Bionanocomposites: Uses as Food Packaging

Reis

Morais

Carvalho

et al. 2016

Macromolecular Symposia

View full text Add to dashboard Cite

The production of plastic waste has caused serious environmental impacts. Since the conventional polymers represent one of the largest percentages of waste, a possible solution for this environmental problem is the use of nanoclaybiopolymers for the preparation of food packaging. The objective of this study was to evaluate the morphological structure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) bionanocomposites and vermiculite through scanning electronic microscopy (SEM) and to verify their packaging/food interaction through the total migration test. The systems were prepared with natural clay and organophilic clay by melt intercalation technique. The migration test was carried out according to the Resolution 105/99 by ANVISA. The SEM micrographs showed a small number of agglomerates for the natural systems and a more uniform structure for the organophilic systems. The migration results of all systems were within the maximum allowable limit for food packages, indicating a possible use of these materials without causing damage to food security.

show abstract

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

Cited by 10 publications

References 24 publications

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

Low-Density Polyethylene Film Biodegradation Potential by Fungal Species from Thailand

Assessment of the Morphology and Interaction of PHBV/Clay Bionanocomposites: Uses as Food Packaging

Contact Info

Product

Resources

About