Biofouling and biodegradation of polyolefins in ocean waters

Sudhakar, M.; Trishul, A.; Doble, Mukesh; Kumar, K. Suresh; Jahan, Shakura; Inbakandan, D.; Viduthalai, R.R.; Umadevi, V.R.; Murthy, P. Sriyutha; Venkatesan, R.

doi:10.1016/j.polymdegradstab.2007.03.029

Cited by 159 publications

(103 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The analysis was performed using a Spectrum 2000 -Perkin Elmer 4000 to 400 cm -1 fed with film-sheet samples. Formation or disappearance of functional groups in the polymer during the process of degradation can be monitored by FTIR [30][31] . Double C=C bonds can be observed on the spectrum at 1645 cm -1 .…”

Section: Fourier Transform Infrared (Ftir) Spectroscopy Analysismentioning

confidence: 99%

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

et al. 2011

View full text Add to dashboard Cite

Polymers are vastly employed for numerous purposes in different industrial segments and generate soaring quantities of discarding in the environment. This research analyzed the degradability/biodegradability of polypropylene films (PP) and Bioriented polypropylene (BOPP) polymers after 11 months interred in the São Giácomo landfill in Caxias do Sul. Comparing the buried PP film to a sample of virgin PP, two peaks of degrading activity appeared at the TG curve as well as structure modification typified by occurrence of new absorption bands at FTIR, which can be credited to changes in crystallinity. Thermal analysis carried out on the buried PP and BOPP showed decreases in the percentage of crystallinity due to chain scission. The major reduction was observed in the PP, since its crystallinity is a consequence of polymerization instead of chain orientation processes, as in BOPP. Cracks and erosion of the polymer surface were detected in both PP and BOPP, indicating degrading processes by microorganisms.

show abstract

Section: Fourier Transform Infrared (Ftir) Spectroscopy Analysismentioning

confidence: 99%

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

et al. 2011

View full text Add to dashboard Cite

show abstract

“…24,25 This spectral analysis provided evidence for the photo-oxidation of the PE films, and the oxidation of the material was evidenced by the formation of carbonyl groups. 17,[26][27][28][29][30] UV-visible spectral analysis The changes in the UV-visible absorption spectra of pristine and prooxidant-added PE are shown in Figure 7. Each final absorption spectrum is that of the non-irradiated and irradiated PE, BPE10 and BPE20 films.…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…10 Abiotic reactions, initialized by the photo-oxidation of PE, introduce oxygen in the form of carbonyl groups. 17 This reaction is followed by microbial utilization of carboxylic groups by microorganisms, which release two carbon chain fragments that are further used in either the catabolic or the anabolic cycle in biotic environments. 7 Photooxidation leads to the formation of carbonyl groups on the surface of PE and increases its hydrophilicity and surface energy, causing embrittlement.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and surface properties of low-density polyethylene film modified by photo-oxidation

Suresh

Maruthamuthu

Kannan

et al. 2011

Polym J

View full text Add to dashboard Cite

Mechanical and surface properties are considered important in governing the physical strength of polymers. A commercially available oxo-biodegradable polymer additive, which has induced surface and mechanical property changes during photo-oxidation in low-density polyethylene (LDPE) films, has been studied. LDPE films containing the oxo-biodegradable additive were irradiated with ultraviolet (UV)-B lamps at 30 ± 1 1C for an extended time period. The changes manifested on the polymer surface and in the mechanical properties were studied with respect to surface wettability, surface morphology using scanning electron microscope, surface topology by atomic force microscopy, functional groups by Fourier transformed infrared spectroscopy, absorbance spectra by UV-visible spectroscopy and elongation at break and tensile strength through mechanical testing. The increase in the wettability and surface-free energy of the irradiated samples was attributed to the formation of hydrophilic groups on the polymer surface by photo-oxidation, which occurs by the exposure of PE to UV irradiation in the presence of air. The degree of reduction in the mechanical strength and surface property modifications in our study are appreciable through the use of an oxo-biodegradable additive added to LDPE film samples.

show abstract

“…Estudos realizados com fitas de poliolefinas de 1,5 mm de espessura, incubadas em ambiente aquático marinho, mostraram que estas amostras sofreram degradação em seis meses sob condições de ambiente tropical, como alta temperatura, alto nível de oxigênio dissolvido e presença de microrganismos [11] .…”

Section: Ensaios De Biodegradaçãounclassified

Biodegradação de filmes de polipropileno (PP), poli(3-hidroxibutirato) (PHB) e blenda de PP/PHB por microrganismos das águas do Rio Atibaia

Faria

Martins-Franchetti

2010

Polímeros

View full text Add to dashboard Cite

Resumo: O propósito deste estudo é investigar a biodegradação de filmes de PHB, PP e blenda de PP/PHB (1:1) por microrganismos de águas de rio poluído que recebeu vários tipos de descartes, inclusive de refinaria de petróleo. Os filmes poliméricos foram obtidos por fusão do pó do material a 175 °C, prensados a 71,3 kgf.cm -2 e resfriados a 25 °C. Estes filmes foram mantidos em amostras de águas do rio poluído, coletadas antes e após o descarte do efluente da refinaria de petróleo e mantidas em estufa bacteriológica a 28 °C, durante 120 dias. As mudanças, causadas pela ação microbiana nos filmes, foram analisadas por medidas de perda de massa, infravermelho com transformada de Fourier (FTIR) e microscopia eletrônica de varredura (MEV). Os resultados provaram que a degradação do PHB ocorre tanto na sua fase amorfa como na cristalina, sendo mais significativa na água do rio que recebeu o efluente da refinaria de petróleo, contendo microrganismos reconhecidos como potencialmente capazes de degradar substâncias persistentes no meio ambiente. Palavras-chave: Biodegradação, PP, PHB, blendas, microrganismos, rio poluído. Biodegradation of Polypropylene (PP), Poly(3-hydroxybutyrate) (PHB) Films and PP/PHB Blend by Microorganisms from Atibaia RiverAbstract: The purpose of this study is to investigate the biodegradation of films made with PP, PHB and PP/PHB (1:1) blend caused by microorganisms from polluted river which received several types of waste, including an oil refinery effluent. The films were obtained by melting the powder from the material at 175 °C, pressed at 71.3 kgf.cm -2 and cooled at 25 °C. These films were kept in polluted river water samples, collected before and after the discarding of oil refinery waste, and they were kept in the bacteriological incubator at 28 °C for 120 days. The changes caused by microbial action on the films were analyzed by measurements of weight loss, Fourier transform infrared (FTIR) and scanning electronic microscopy (SEM). The results proved that PHB degradation occurs in amorphous and crystalline phases, being more significant in the river water which received refinery oil waste, containing microorganisms recognized as potentially capable to degrade recalcitrant substances in the environment. Keywords: Biodegradation, PP, PHB, blends, microorganisms, polluted river. IntroduçãoOs polímeros sintéticos tornaram-se importantes na sociedade porque podem substituir materiais como: papel, madeira, vidro e metal, solucionando grande número de problemas, quer na indústria, na agricultura, na medicina e em outras áreas. Isso se deve às características como: durabilidade, atoxicidade, baixo custo, facilidade para serem moldados, capacidade de serem reciclados e versatilidade de aplicação. O mercado de resinas plásticas tem aumentado ultimamente, significando uma expansão da indústria petroquímica, que movimenta a economia e gera empregos em diversos segmentos do setor [1,2] . Entretanto, o uso e o descarte indevidos dos materiais plásticos, aliados a sua resistência à degradação acabam g...

show abstract

Biofouling and biodegradation of polyolefins in ocean waters

Cited by 159 publications

References 16 publications

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment

Mechanical and surface properties of low-density polyethylene film modified by photo-oxidation

Biodegradação de filmes de polipropileno (PP), poli(3-hidroxibutirato) (PHB) e blenda de PP/PHB por microrganismos das águas do Rio Atibaia

Contact Info

Product

Resources

About