Degradation of excavated polyethylene and polypropylene waste from landfill

Show simple item record Canopoli, Luisa Coulon, Frédéric Wagland, Stuart T. 2019-09-27T09:57:10Z 2019-09-27T09:57:10Z 2019-08-26
dc.identifier.citation Canopoli L, Coulon F & Wagland ST. Degradation of excavated polyethylene and polypropylene waste from landfill. Science of the Total Environment, Volume 698, January 2019, Article number 134125 en_UK
dc.identifier.issn 0048-9697
dc.description.abstract In 2016, it was estimated that 7.4 million tonnes of plastic waste have been disposed in landfill in Europe. This waste represents an important opportunity for resource recovery through enhanced landfill mining consistent with recent Circular Economy initiatives. However, a recent review found a lack of data describing the degradation of excavated plastic waste and the potential impact on recycling products such as pyrolysis oil. In this study, the physicochemical characteristics of the main plastic types found in landfills and their implications for recovery and recycling were investigated using a combination of scanning electron microscopy energy dispersive spectroscopy (SEM-EDS), attenuated total reflectance Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). Loss of gloss was visually detected for the buried plastic waste samples (polyethylene (PE) and polypropylene (PP)) compared to fresh plastic samples. The SEM-EDS analysis further showed that oxygen was the main element related to the plastic surface alteration. The carbonyl index (CI) of plastic samples buried for >10 years was between 1.5 and 2 times higher than <10 years and fresh materials. Similarly, the degree crystallinity of the old samples (>10 years) was 2 times higher than the fresh and < 10 years samples. Based on these findings, tertiary recycling, such as pyrolysis, seems to be a convenient route for upcycling of recovered plastics from municipal solid waste landfills. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution 4.0 International *
dc.rights.uri *
dc.subject Enhanced landfill mining en_UK
dc.subject Plastic recovery en_UK
dc.subject Excavated plastic en_UK
dc.subject Plastic degradation en_UK
dc.title Degradation of excavated polyethylene and polypropylene waste from landfill en_UK
dc.type Article en_UK

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