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dc.contributor.authorJohnston, Brian
dc.contributor.authorRadecka, Iza
dc.contributor.authorHill, David
dc.contributor.authorChiellini, Emo
dc.contributor.authorIlieva, Vassilka Ivanova
dc.contributor.authorSikorska, Wanda
dc.contributor.authorMusioł , Marta
dc.contributor.authorZięba, Magdalena
dc.contributor.authorMarek, Adam A.
dc.contributor.authorKeddie, Daniel
dc.contributor.authorMendrek, Barbara
dc.contributor.authorDarbar, Surila
dc.contributor.authorAdamus, Grazyna
dc.contributor.authorKowalczuk , Marek
dc.date.accessioned2018-09-25T10:58:15Z
dc.date.available2018-09-25T10:58:15Z
dc.date.issued2018-08-29
dc.identifier.citationJohnston, B., Radecka, I., Hill, D., Chiellini, E., Ilieva, VI., Sikorska, W., Musioł, M., Zięba, M., Marek, AA., Keddie, D., Mendrek, B., Darbar, S., Adamus, G., Kowalczuk, M. (2018) 'The Microbial Production of Polyhydroxyalkanoates from Waste Polystyrene Fragments Attained Using Oxidative Degradation' Polymers, 10(9), 957
dc.identifier.issn2073-4360
dc.identifier.doi10.3390/polym10090957
dc.identifier.urihttp://hdl.handle.net/2436/621711
dc.description© 2018 The Authors. Published by MDPI. This is an open access article available under a Creative Commons licence. The published version can be accessed at the following link on the publisher’s website: https://doi.org/10.3390/polym10090957
dc.description.abstractExcessive levels of plastic waste in our oceans and landfills indicate that there is an abundance of potential carbon sources with huge economic value being neglected. These waste plastics, through biological fermentation, could offer alternatives to traditional petrol-based plastics. Polyhydroxyalkanoates (PHAs) are a group of plastics produced by some strains of bacteria that could be part of a new generation of polyester materials that are biodegradable, biocompatible, and, most importantly, non-toxic if discarded. This study introduces the use of prodegraded high impact and general polystyrene (PS0). Polystyrene is commonly used in disposable cutlery, CD cases, trays, and packaging. Despite these applications, some forms of polystyrene PS remain financially and environmentally expensive to send to landfills. The prodegraded PS0 waste plastics used were broken down at varied high temperatures while exposed to ozone. These variables produced PS flakes (PS1–3) and a powder (PS4) with individual acid numbers. Consequently, after fermentation, different PHAs and amounts of biomass were produced. The bacterial strain, Cupriavidus necator H16, was selected for this study due to its well-documented genetic profile, stability, robustness, and ability to produce PHAs at relatively low temperatures. The accumulation of PHAs varied from 39% for prodegraded PS0 in nitrogen rich media to 48% (w/w) of dry biomass with the treated PS. The polymers extracted from biomass were analyzed using nuclear magnetic resonance (NMR) and electrospray ionization tandem mass spectrometry (ESI-MS/MS) to assess their molecular structure and properties. In conclusion, the PS0–3 specimens were shown to be the most promising carbon sources for PHA biosynthesis; with 3-hydroxybutyrate and up to 12 mol % of 3-hydroxyvalerate and 3-hydroxyhexanoate co-monomeric units generated.
dc.formatapplication/PDF
dc.language.isoen
dc.publisherMDPI
dc.relation.urlhttps://www.mdpi.com/2073-4360/10/9/957
dc.subjectpolyhydroxyalkanoates (PHAs)
dc.subjectpolystyrene (PS)
dc.subjectprodegraded
dc.subjectCupriavidus necator
dc.subjectfermentation
dc.subjectmass spectrometry
dc.subjectbioplastics
dc.subjectrecycling
dc.titleThe microbial production of polyhydroxyalkanoates from waste polystyrene fragments attained using oxidative degradation
dc.typeJournal article
dc.identifier.journalPolymers
dc.identifier.articlenumber957
dc.date.accepted2018-08-24
rioxxterms.funderUniversity of Wolverhampton
rioxxterms.identifier.projectUOW25092018IR
rioxxterms.versionAM
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by/4.0/
rioxxterms.licenseref.startdate2020-11-11
dc.source.volume10
dc.source.issue9
refterms.dateFCD2018-09-25T10:58:15Z
refterms.versionFCDAM
refterms.dateFOA2018-10-04T13:01:22Z


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