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Polymers Recycling: Upcycling Techniques. an Overview
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This paper is not about microplastics in a research sense; it is an overview of polymer recycling and upcycling techniques, mentioning microplastic accumulation briefly as motivation but not investigating microplastics directly.
Since 1950 plastics became the materials of greatest world production. Thus, in recent years the increase in the use of different types of plastics has been a matter of global concern due to the depletion of fossil fuels and the accumulation of waste in the different environmental matrices, affecting the ecosystem. By 2015, 4.9 million metric tons of plastic waste were recorded in landfills, because more than 40% of the plastics produced are designed for single use. The mass amount of plastic is estimated to exceed 450 million tonnes per year and will double by 2045.
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Degradation and Recycling of Polymer Materials
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This review synthesizes research on the degradation and recycling of polymer materials, covering microplastic formation, recycling strategies, and plastic degradation mechanisms as responses to the significant environmental damage caused by discarded plastics in ocean and other ecosystems.
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This review examines strategies for upcycling waste plastics into valuable products as an alternative to landfilling and incineration, which generate microplastics and carbon emissions respectively. Researchers survey chemical recycling methods including pyrolysis, gasification, and catalytic processes that can convert common plastics like PET, polyethylene, and polystyrene into fuels, chemicals, and new materials. The study highlights the urgent need for more effective recycling technologies to address the growing gap between plastic production and waste management capacity.
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This review examines current technologies for mechanically recycling and upcycling plastic pollution collected from the ocean, covering everything from collection to processing into new materials. Researchers found that while significant progress has been made in sorting and reprocessing marine macroplastics, recycling marine microplastics remains a major technical challenge due to their small size and degraded condition. The study calls for continued innovation to make marine plastic recycling more cost-effective and scalable.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.