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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2205
Title: Anionic surfactant induced oxidation of low density polyethylene followed by its microbial bio-degradation
Authors: Mukherjee S.
Roy Chaudhuri U.
Kundu, Patit Paban
Published in: International Biodeterioration and Biodegradation
Abstract: Hydrocarbon solubilization ability of surfactants was utilised for the deterioration of polyethylene during its thermal oxidation. Carbonyl index of polyethylene treated with Sodium dodecyl sulphate (SDS) at 60 °C for 1 month was found to be higher than thermally oxidised polyethylene as observed in FTIR study. Moreover, higher oxidation of polyethylene was witnessed after treatment of control polyethylene with 1%–10% of sodium dodecyl benzene sulphonate, sodium stearate, sodium octyl sulphate and sodium dodecyl sulphate at 60 °C for 1 month. Oxidation level of polyethylene treated by surfactant was higher as the availability of soluble oxygen and chain scission increased due to the attachment of surfactant to the polyethylene surface. Weight loss of 7.006 ± 0.05%, 1.76 ± 0.05% and 0.83 ± 0.05% were maximum which was achieved after bacterial treatment of oxidised polyethylene with 6%, 8% and 10% SDS, with L. fusiformis using peptone for 1 month, respectively. Along with weight loss after bacterial incubation, a decrease in the amount of carbonyls and an increase in the amount of unsaturated hydrocarbon were observed for the conversion of carbonyls into unsaturated hydrocarbon through biotic Norrish-type mechanisms. The biodegradation through ?-oxidation mechanisms, by which oxidised polyethylene molecule was utilised to produce necessary energy for bacteria, was confirmed by a decrease in intrinsic viscosity and a decrease in the viscosity average molecular weight (Mv) of bacterially treated polyethylene. Nevertheless, an increase in the amount of carbonyls was observed after 1 month of bacterial incubation of polyethylene treated with SDBS and thermally oxidised polyethylene which was due to oxidation by oxidative enzymes released by Lysinibacillus fusiformis. © 2017 Elsevier Ltd
Citation: International Biodeterioration and Biodegradation (2017), 117(): 255-268
URI: https://doi.org/10.1016/j.ibiod.2017.01.013
http://repository.iitr.ac.in/handle/123456789/2205
Issue Date: 2017
Publisher: Elsevier Ltd
Keywords: Bio-deterioration
Degradation
GC-MS
Polyethylene
Solubilization
Surfactant
ISSN: 9648305
Author Scopus IDs: 56092079800
57192917752
35475516300
Author Affiliations: Mukherjee, S., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 APC Road, Kolkata, West Bengal 700009, India
RoyChaudhuri, U., Department of Chemical Technology, University of Calcutta, 92 APC Road, Kolkata, West Bengal 700009, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92 APC Road, Kolkata, West Bengal 700009, India, Department of Chemical Engineering, Indian Institute of Technology, Roorkee, 247667, India
Corresponding Author: Kundu, P.P.; Department of Chemical Technology, University of Calcutta, 92 APC Road, India; email: ppk923@yahoo.com
Appears in Collections:Journal Publications [CH]

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