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Microparticle pollution in the light of polymer materials recycling
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A review of polymer plastics and microparticle emissions finds that while recycling is promoted as a sustainability solution, reprocessing and washing cycles can increase the release of microparticles into the environment, posing risks that current regulations underaddress. This is directly relevant to microplastic pollution research as it identifies plastic recycling itself as an underappreciated source of secondary microplastic contamination.
Polymer plastics have established a major sector in the global economy, fulfilling the needs of various industries, including packaging, construction, automotive, electronics, and healthcare. Due to a unique set of physical properties, those materials are durable, versatile, and enable large-scale low-cost production. However, as environmental awareness rises, the raw materials sector is encouraged to increase the contribution of sustainable products with a lower environmental impact. It is being conducted through various activities such as recycling, introducing biodegradable alternatives, and/or diversifying sources of raw materials. In this short review, a holistic approach to analyse current knowledge regarding conventional plastic microparticle emissions into the environment is presented, with a special regard to the correlation with the existing plastic waste recycling technologies. The re- view takes into account current legal provisions regarding increasing the use of recycled plastics and highlights the risks resulting from the increased release of microparticles after reprocessing, washing, use, etc. The presented research results encourage consideration of the possible consequences of polymer reuse.
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This review discusses the environmental implications of polymers and microplastics, covering their properties, production trends, degradation pathways, and ecological impacts. It highlights the tension between the industrial utility of plastics and their growing threat to environmental and human health.
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Researchers found that the mechanical recycling process for plastics actually generates significant amounts of new microplastics, with global emissions from recycling projected to grow from 0.017 million tonnes in 2000 to 0.749 million tonnes by 2060. While recycling accounted for about 3.1% of total microplastic emissions in 2017, this share could grow as recycling increases. The study highlights an important paradox: efforts to reduce plastic waste through recycling can themselves contribute to microplastic pollution unless wastewater treatment at recycling facilities is improved.
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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.