Brazilian Cerrado soil reveals an untapped microbial potential for unpretreated polyethylene biodegradation

Peixoto, Julianna; Silva, Luciano; Krüger, Ricardo Henrique

doi:10.1016/j.jhazmat.2016.11.037

Cited by 156 publications

(69 citation statements)

References 49 publications

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“…The type and amount of enzyme production from bacteria is a key factor to access high molar mass polymer chain as the secondary carbon source in media in biodegradation experiment. As Peixoto et al [8] showed, there is evidence of biodegradation of LDPE of 191,000 g/mol without pretreatment in the form of a decrease in crystalinity percentage. It has been suggested any PE fibers used for biodegradation experiments be branched and amorphous to be more accessible for microbial attack.…”

Section: Guidelines For Studying Microbial Degradation Of Polyethylenementioning

confidence: 98%

“…After microbial treatment, the surface of the LMWPE sheet was greatly deteriorated and eroded as a result of the microbial activity. More recently, Peixoto et al [8] isolated bacteria in the genera Cocomonas, Delftia, and Stentrophomonas from plastic debris found in soil of the savanna-like Brazilian Cerrado and demonstrated that all strains were capable of degrading ultra-high molar mass polyethylene with molar mass up to 191,000 g/mol without additives or pre-treatments. Raman spectroscopy was used to confirm a significant loss in PE crystalline content.…”

Section: Modification Of Polyethylenementioning

confidence: 99%

“…There is mounting evidence that micro-plastics are now found everywhere on the planet, including snow in the arctic [7]. Hence, a suitable method for disposal that is eco-friendly must be found [1,2,8].…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers have isolated potential microorganisms from different type of soil (garden soil, forest soil, garbage soil, mangrove soil, soil containing agricultural PE films for soil mulching) [32][33][34][35][36]. Plastic debris, solid waste dumps sites, or landfill areas (municipal solid soil) [8,[37][38][39][40][41][42], water [2,43], waste water or sewage sludge [44], oil contaminated soil [45,46], and even from Waxworm larvae [47] were the other sources for the isolation of high potential PE-degrading bacteria.…”

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confidence: 99%

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Challenges with Verifying Microbial Degradation of Polyethylene

2020

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Polyethylene (PE) is the most abundant synthetic, petroleum-based plastic materials produced globally, and one of the most resistant to biodegradation, resulting in massive accumulation in the environment. Although the microbial degradation of polyethylene has been reported, complete biodegradation of polyethylene has not been achieved, and rapid degradation of polyethylene under ambient conditions in the environment is still not feasible. Experiments reported in the literature suffer from a number of limitations, and conclusive evidence for the complete biodegradation of polyethylene by microorganisms has been elusive. These limitations include the lack of a working definition for the biodegradation of polyethylene that can lead to testable hypotheses, a non-uniform description of experimental conditions used, and variations in the type(s) of polyethylene used, leading to a profound limitation in our understanding of the processes and mechanisms involved in the microbial degradation of polyethylene. The objective of this review is to outline the challenges in polyethylene degradation experiments and clarify the parameters required to achieve polyethylene biodegradation. This review emphasizes the necessity of developing a biochemically-based definition for the biodegradation of polyethylene (and other synthetic plastics) to simplify the comparison of results of experiments focused for the microbial degradation of polyethylene.

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Section: Guidelines For Studying Microbial Degradation Of Polyethylenementioning

confidence: 98%

Section: Modification Of Polyethylenementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Challenges with Verifying Microbial Degradation of Polyethylene

2020

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“…pragas em plantações. As Burlkholderias são geralmente patogênicas e podem ser encontradas em infecções hospitalares[56][57][58]62,63 .Todas as bactérias precisam de nutrientes para sobreviver além da fonte de Na segunda etapa seguiu-se com o tratamento, utilizando a bactéria para degradar as moléculas dos compostos fenólicos. A identificação da bactéria e a coloração de Gram também foram realizados nesta etapa, além da análise do HPLC).…”

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Degradação bacteriana de compostos fenólicos visando a descontaminação da areia de fundição.

Rodrigues¹

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The foundry sand agglomerated with the phenolic resin becomes a hazardous waste after its use in the metallurgical industry. Phenol, ortho cresol and meta cresol were the main compounds in sand. The present work aims to study the bacterial degradability of the phenolic compounds present in the foundry sand. A strain from na oil extraction residue was isolated and identified by MALDI-Biotyper as Burkholderia. It was carried out the process of bacterial activation and growth at pH 6.5, 180 rpm (rotation per minute), 28°C and culture médium with minimum nutrients, using phenolic sand as the only source of carbon. During the tests the growth of the bacterium as well as the degradation of the phenolic compounds were studied. Quantification of free phenol, meta-cresol and ortho-cresol was determined by the high performance liquid chromatography (HPLC) method. The degradation rate for the three substances was 100%.

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