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Biodegradation of Ethylene Vinyl Acetate Using Klebsiella aerogenes EM011 Isolated from Effective Microorganisms.

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Title: Biodegradation of Ethylene Vinyl Acetate Using Klebsiella aerogenes EM011 Isolated from Effective Microorganisms.
Authors: Maidarjav, Amarbayasgalan1 (AUTHOR), Nyamjav, Indra1 (AUTHOR), Kim, Hong Rae2 (AUTHOR), Suh, Dong-Eun2 (AUTHOR), Lee, Sukkyoo1 (AUTHOR) slee2012@dgist.ac.kr
Source: Journal of Polymers & the Environment. Nov2024, Vol. 32 Issue 11, p5823-5836. 14p.
Subject Terms: *Plastic scrap, X-ray photoelectron spectroscopy, Ethylene-vinyl acetate, Photoelectron spectroscopy, Insect larvae
Abstract: The amount of global plastic waste on land or in marine environments is a critical environmental issue. Plastic biodegradation by microorganisms, insect larvae, and enzymes has become one of the most popular solutions due to the ability of this strategy to generate environmentally benign byproducts, addressing ecological plastic waste concerns. This study revealed the biodegradation of ethylene vinyl acetate (EVA) by the bacterial strain identified as Klebsiella aerogenes EM011, isolated from effective microorganisms. The study found that K. aerogenes EM011 can survive in a carbon-free medium for 30 days using EVA films as the sole energy source, decomposing 0.65 ± 0.04% of 1 g of EVA film. The surface changes of the film were detected using scanning electron microscopy after treatment with K. aerogenes EM011. In addition, elemental modifications were detected in the imaged area of the plastic surfaces by energy-dispersive X-ray spectroscopy. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses were conducted to detect changes in the functional groups and chemical components, elucidating alterations on the surface of the EVA films. Through these physicochemical analyses, the formation of carbonyl groups (C=O), ester groups (C–O), and hydroxyl groups (–OH) confirmed the oxidation of EVA. Furthermore, the oxidation led to the decomposition of the EVA film, resulting in changes in its thermal stability and molecular weight distribution. These findings show that the K. aerogenes EM011 strain plays a role in accelerating the biodegradation of EVA. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Polymers & the Environment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Biodegradation of Ethylene Vinyl Acetate Using Klebsiella aerogenes EM011 Isolated from Effective Microorganisms.
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  Data: <searchLink fieldCode="AR" term="%22Maidarjav%2C+Amarbayasgalan%22">Maidarjav, Amarbayasgalan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nyamjav%2C+Indra%22">Nyamjav, Indra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Hong+Rae%22">Kim, Hong Rae</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Suh%2C+Dong-Eun%22">Suh, Dong-Eun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Sukkyoo%22">Lee, Sukkyoo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> slee2012@dgist.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Polymers+%26+the+Environment%22">Journal of Polymers & the Environment</searchLink>. Nov2024, Vol. 32 Issue 11, p5823-5836. 14p.
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  Data: *<searchLink fieldCode="DE" term="%22Plastic+scrap%22">Plastic scrap</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+photoelectron+spectroscopy%22">X-ray photoelectron spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Ethylene-vinyl+acetate%22">Ethylene-vinyl acetate</searchLink><br /><searchLink fieldCode="DE" term="%22Photoelectron+spectroscopy%22">Photoelectron spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Insect+larvae%22">Insect larvae</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The amount of global plastic waste on land or in marine environments is a critical environmental issue. Plastic biodegradation by microorganisms, insect larvae, and enzymes has become one of the most popular solutions due to the ability of this strategy to generate environmentally benign byproducts, addressing ecological plastic waste concerns. This study revealed the biodegradation of ethylene vinyl acetate (EVA) by the bacterial strain identified as Klebsiella aerogenes EM011, isolated from effective microorganisms. The study found that K. aerogenes EM011 can survive in a carbon-free medium for 30 days using EVA films as the sole energy source, decomposing 0.65 ± 0.04% of 1 g of EVA film. The surface changes of the film were detected using scanning electron microscopy after treatment with K. aerogenes EM011. In addition, elemental modifications were detected in the imaged area of the plastic surfaces by energy-dispersive X-ray spectroscopy. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses were conducted to detect changes in the functional groups and chemical components, elucidating alterations on the surface of the EVA films. Through these physicochemical analyses, the formation of carbonyl groups (C=O), ester groups (C–O), and hydroxyl groups (–OH) confirmed the oxidation of EVA. Furthermore, the oxidation led to the decomposition of the EVA film, resulting in changes in its thermal stability and molecular weight distribution. These findings show that the K. aerogenes EM011 strain plays a role in accelerating the biodegradation of EVA. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Polymers & the Environment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10924-024-03348-9
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        Text: English
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      – SubjectFull: Photoelectron spectroscopy
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      – SubjectFull: Insect larvae
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      – TitleFull: Biodegradation of Ethylene Vinyl Acetate Using Klebsiella aerogenes EM011 Isolated from Effective Microorganisms.
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            NameFull: Maidarjav, Amarbayasgalan
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            NameFull: Lee, Sukkyoo
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              M: 11
              Text: Nov2024
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