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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2270
Title: Alkaline fungal degradation of oxidized polyethylene in black liquor: Studies on the effect of lignin peroxidases and manganese peroxidases
Authors: Mukherjee S.
Kundu, Patit Paban
Published in: Journal of Applied Polymer Science
Abstract: High-molecular-weight polyethylene is resistant to natural environmental degradation for its crystalline, hydrophobic structure. In this study, waste polyethylene bags are chemically oxidized at 80°C for 5 days by potassium dichromate solutions of various concentrations along with sulfuric acid. Absorbance peaks of carbonyl and carboxylate ions in the Fourier transform infrared spectroscopy spectra and formation of amorphous phase from crystalline one as indicated in X ray diffraction studies of oxidized polyethylenes indicate the formation of a polar hydrophilic and low-molecular-weight material after oxidation. From the scanning electron microscopy studies, it is observed that reacted polyethylene surface is disintegrated and numerous fissures are formed throughout the surface. The respective weight loss of incubated oxidized polyethylene with Phanerochaete chrysosporium (MTCC-787) after 15 days of incubation is 70%, respectively, in black liquor-glucose-malt extract medium. As both lignin peroxidase (LiP) and manganese peroxidase (MnP) were detected in this media, further degradation of oxidized polyethylene is carried out in four different media with varying amount of N and Mn. The weight loss is observed only in media with excess nitrogen (N) and limited manganese (Mn), the condition which enhances the presence of LiP and MnP. This indicates that these enzymes are essential for degradation of lignin as well as oxidized polyethylene. UV spectroscopic studies indicate 40% decrease in the lignin concentration. This process of fungal degradation of chemically oxidized polyethylene using black liquor is very quick compared to the other related studies, leading to the simultaneous degradation of two waste materials, polyethylene and black liquor. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40738. © 2014 Wiley Periodicals, Inc.
Citation: Journal of Applied Polymer Science (2014), 131(17): 8982-8990
URI: https://doi.org/10.1002/app.40738
http://repository.iitr.ac.in/handle/123456789/2270
Issue Date: 2014
Publisher: John Wiley and Sons Inc.
Keywords: biodegradation
cellulose and other wood products
degradation
ISSN: 218995
Author Scopus IDs: 56092079800
35475516300
Author Affiliations: Mukherjee, S., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 APC Road, West Bengal, Kolkata-9, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 APC Road, West Bengal, Kolkata-9, India
Corresponding Author: Kundu, P.P.; Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 APC Road, West Bengal, Kolkata-9, India; email: ppk923@yahoo.com
Appears in Collections:Journal Publications [CH]

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