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Title: Technical and environmental assessment of laboratory scale approach for sustainable management of marine plastic litter
Authors: Veksha, Andrei 
Ahamed, Ashiq
Wu, Xinyi
Liang, Lili
Chan, Wei Ping
Giannis, Apostolos
Lisak, Grzegorz
Keywords: Engineering::Environmental engineering
Issue Date: 2022
Source: Veksha, A., Ahamed, A., Wu, X., Liang, L., Chan, W. P., Giannis, A. & Lisak, G. (2022). Technical and environmental assessment of laboratory scale approach for sustainable management of marine plastic litter. Journal of Hazardous Materials, 421, 126717-.
Journal: Journal of Hazardous Materials 
Abstract: Laboratory scale recycling of marine plastic litter consisting of polyethylene terephthalate (PET) bottle sorting, pyrolysis and chemical vapor deposition (CVD) was conducted to identify the technical and environmental implications of the technology when dealing with real waste streams. Collected seashore and underwater plastics (SP and UP, respectively) contained large quantities of PET bottles (33.2 wt% and 61.4 wt%, respectively), suggesting PET separation was necessary prior to pyrolysis. After PET sorting, marine litter was converted into pyrolysis oil and multi-walled carbon nanotubes (MWCNTs). Water-based washing of litter prior to pyrolysis did not significantly change the composition of pyrolysis products and could be avoided, eliminating freshwater consumption. However, distinct differences in oil and MWCNT properties were ascribed to the variations in feedstock composition. Maintaining consistent product quality would be one of challenges for thermochemical treatment of marine litter. As for the environmental implications, life cycle assessment (LCA) demonstrated positive benefits, including improved climate change and fossil depletion potentials. The highest positive environmental impacts were associated with MWCNT production followed by pyrolysis oil and PET recovery. The benefits of proposed approach combining PET sorting, pyrolysis and CVD allowed to close the waste loop by converting most of the marine litter into valuable products.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2021.126717
Schools: School of Civil and Environmental Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Residues and Resource Reclamation Centre 
Rights: © 2021 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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