A review on VOCs from recycled plastics

Cabanes, Andrea; Valdés, Francisco Javier; Fullana, Andrés

doi:10.1016/j.susmat.2020.e00179

Cited by 56 publications

(56 citation statements)

References 110 publications

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“…Additionally, as determined by cOEDA, potent odorants (OD factor ≥ 27 in the reference sample) with the highest differences in OD factors between the reference and the probiotics-treated sample (no. 9,11,12,17,23,25,37,45,47) showed deviations of a maximum of three OD steps. However, these compounds were still perceivable in both samples in any case, meaning that none of these compounds was fully eliminated through the probiotic treatment.…”

Section: Comparison Of Human Sensory Evaluation and Analytical Resultsmentioning

confidence: 97%

“…Apart from that, substantial OD differences were observed for the sulfur compounds dimethyl trisulfide (11), 2-mercapto-3-pentanone (12) and methional (17). All of these compounds have been previously identified as odorous contaminants in post-consumer plastic waste and are linked to the bacterial spoilage of organic waste [29,43].…”

Section: Odor Reduction By the Application Of Probiotic Bacterial Culturesmentioning

confidence: 99%

“…The unwanted smell of recyclates can be traced back to the high contamination of input material, primarily from post-consumer plastic waste [5]. Although methods that aim at odor reduction exist, for instance by physical deodorization or advanced washing processes, including the application of hot water or chemical additives, a complete odor removal has hitherto not been achieved [6][7][8][9][10][11][12][13]. Moreover, a high-energy input or the addition of potentially environmentally critical chemicals, such as detergents, absorbers or entrainers, are often still required.…”

Section: Introductionmentioning

confidence: 99%

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Exploring Odor Minimization in Post-Consumer Plastic Packaging Waste through the Use of Probiotic Bacteria

et al. 2020

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Plastic packaging represents a large proportion of the plastic consumption throughout the world. The negative environmental impact associated with plastic packaging waste can be in part abated by recycling plastics, and increasing numbers of regulatory frameworks are being adopted towards this goal. Despite recent advances in modern recycling technologies, the production of high-quality polyolefin recyclates remains a challenge. Among other functional requirements, odor plays a crucial role in the acceptance of recycled packaging. This presents a challenge, as odor contamination in plastic packaging waste can stem from diverse sources, such as spoilage processes, and strongly depends on the quality of the post-consumer input material. The present study addressed this issue by exploring potential odor abatement of malodors in packaging waste through the use of probiotic bacteria. Specifically, probiotics were added to a mixed post-consumer plastic packaging waste fraction, which was subsequently evaluated using human sensory and gas chromatography–olfactometric analyses. A comparison of treated with untreated plastic waste fractions revealed significant sensory differences. Further structural elucidation of the causative odorants confirmed a reduction in malodorous microbial metabolites, although complete odor removal was not achieved. However, this environmentally friendly approach may represent an essential step towards overcoming the odor burden in post-consumer plastic packaging recyclates.

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Section: Comparison Of Human Sensory Evaluation and Analytical Resultsmentioning

confidence: 97%

Section: Odor Reduction By the Application Of Probiotic Bacterial Culturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploring Odor Minimization in Post-Consumer Plastic Packaging Waste through the Use of Probiotic Bacteria

et al. 2020

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“…Besides, synthetic polymer degradability after disposal is a serious environmental concern ( Moore, 2008 ; Miller, 2013 ; Souzandeh et al, 2019 ). Synthetic polymers continue to release harmful VOCs even after disposal ( Lomonaco et al, 2020 ) and recycling ( Cabanes et al, 2020 ). Synthetic polymers also have lethal effects on aquatic and terrestrial ecosystem ( Singh et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Gelatin/β–Cyclodextrin Bio–Nanofibers as respiratory filter media for filtration of aerosols and volatile organic compounds at low air resistance

Kadam

Truong

Schütz

et al. 2021

Journal of Hazardous Materials

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“…[23]. Contaminants such as VOCs are generally the result of insufficient cleaning during recycling, of degradation processes or of additives in the polymeric matrix [24][25][26]. HPW, on the other hand, must contend with a different set of obstacles: for example, due to the long life of most hard plastic consumer products compared to that of plastic packaging, degradation processes are arguably more significant for the development of secondary contaminants, together with additives and residues from additives.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends

et al. 2021

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The recycling of plastic waste is undergoing fast growth due to environmental, health and economic issues, and several blends of post-consumer and post-industrial polymeric materials have been characterized in recent years. However, most of these researches have focused on plastic containers and packaging, neglecting hard plastic waste. This study provides the first experimental characterization of different blends of hard plastic waste and virgin polypropylene in terms of melt index, differential scan calorimetry (DSC), thermogravimetric analysis (TGA), mechanical properties (tensile, impact and Shore hardness) and Vicat softening test. Compared to blends based on packaging plastic waste, significant differences were observed in terms of melt flow index (about 10 points higher for hard plastic waste). Mechanical properties, in particular yield strain, were instead quite similar (between 5 and 9%), despite a higher standard deviation being observed, up to 10%, probably due to incomplete homogenization. Results demonstrate that these worse performances could be mainly attributed to the presence of different additives, as well as to the presence of impurities or traces of other polymers, other than incomplete homogenization. On the other hand, acceptable results were obtained for selected blends; the optimal blending ratio was identified as 78% post-consumer waste and 22% post-industrial waste, meeting the requirement for injection molding and thermoforming.

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A review on VOCs from recycled plastics

Cited by 56 publications

References 110 publications

Exploring Odor Minimization in Post-Consumer Plastic Packaging Waste through the Use of Probiotic Bacteria

Exploring Odor Minimization in Post-Consumer Plastic Packaging Waste through the Use of Probiotic Bacteria

Gelatin/β–Cyclodextrin Bio–Nanofibers as respiratory filter media for filtration of aerosols and volatile organic compounds at low air resistance

Effect of Hard Plastic Waste on the Quality of Recycled Polypropylene Blends

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