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Environmental Evaluation of Chemical Plastic Waste Recycling: A Life Cycle Assessment Approach
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This paper is not relevant to microplastics research; it performs a life cycle assessment of chemical recycling of plastic waste via pyrolysis in Spain, concluding the process produces lower carbon emissions than fossil diesel, but the focus is on industrial energy recovery rather than microplastic environmental impacts.
Due to the high environmental burden of plastics, this study aimed to evaluate the environmental performance of chemical recycling of plastic waste through Life Cycle Assessment (LCA), focusing on pyrolysis oil production as the primary output. A pyrolysis plant in Almería, Spain, was chosen as a case study. The results indicate that the production of 1 L of pyrolysis oil from plastic waste generates about 0.032 kg CO2 eq and a water consumption of 0.031 m3, with other impact categories registering values of less than 0.1 kg/L or 0.01 m2a crop eq/L, reducing impacts in 17 out of 18 categories compared to fossil diesel. In addition, its chemical and physical properties, close to those of fossil diesel, suggest its suitability for internal combustion engines, although as a blend rather than a complete substitute. Chemical recycling also appears to be more environmentally favorable than incineration and landfilling in all 18 impact categories, achieving significant benefits, including a reduction in global warming of −3849 kg CO2 eq/ton, ionizing radiation of −22.4 kBq Co-60 eq/ton, and fossil resource consumption of −1807.5 kg oil eq/ton. These results, thus, highlight the potential dual role of chemical recycling of plastic waste, both in mitigating environmental impacts and in supporting circular economy goals by reducing demand for virgin plastics. However, although it appears to be a promising technology, challenges associated with high energy requirements, raw material variability, and scale infrastructure still need to be addressed to ensure industrial competitiveness and significant environmental benefits.
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Assessing the environmental footprint of recycled plastic pellets: A life-cycle assessment perspective
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This study used life-cycle assessment to evaluate the environmental impact of producing recycled plastic pellets from waste polyolefin plastics. While recycling reduced carbon emissions compared to making new plastic, the process still required significant energy, especially when solvent recovery was maximized. The research is relevant to the microplastics problem because it shows that even recycling processes need optimization to truly reduce the environmental footprint of plastic waste.
Life Cycle Assessment (LCA) and Environmental Impacts Towards Plastic Waste by Using Pyrolysis
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This study used life cycle assessment to evaluate the environmental impact of converting plastic waste into fuel through pyrolysis. The findings suggest pyrolysis can reduce plastic waste in landfills while generating usable energy, though careful emission management is required.
Assessment of Co-Pyrolysis of Polypropylene with Triacylglycerol-Based Waste Biomass to Obtain Sustainable Hydrocarbons
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Despite its title referencing polypropylene co-pyrolysis, this paper studies the thermal breakdown of polypropylene plastic waste combined with biodiesel industry byproducts to produce renewable hydrocarbon fuels — not microplastic pollution. It examines chemical product yields from waste-to-fuel conversion, and is not relevant to microplastics or human health.
Exploring the potential of chemical recycling using a distributed model in the UK – A life cycle assessment perspective
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Researchers conducted a life cycle assessment of small-scale, decentralized pyrolysis plants converting mixed plastic waste into naphtha in the UK, finding that chemical recycling reduces climate change impacts by up to 2,977 kg CO2-equivalent per tonne compared to virgin plastic production. While promising as a complement to mechanical recycling for complex waste streams, the study notes ongoing challenges with by-product environmental impacts and the need for policy support.
Harnessing High-Density-Polyethylene-Derived Liquid as a Model Solvent for the Co-Liquefaction of Low-Rank Coals: Toward Sustainable Mesophase Pitch for Making High-Quality Carbon Fibers from Waste Plastics
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Despite its title referencing polyethylene recycling and mesophase pitch production, this paper studies an industrial chemistry process for converting waste plastic into carbon fiber precursors via coal liquefaction — not microplastic pollution or environmental health. It examines how hydrogen-rich liquid derived from HDPE plastic can improve coal-to-carbon conversion, and is not relevant to microplastics or human exposure.
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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.