Shape-controlled fabrication of MnO/C hybrid nanoparticle from waste polyester for solar evaporation and thermoelectricity generation

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 138534 - 138534

Published: Aug. 6, 2022

Language: Английский

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Wax worm saliva and the enzymes therein are the key to polyethylene degradation by Galleria mellonella

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Oct. 4, 2022

Plastic degradation by biological systems with re-utilization of the by-products could be a future solution to global threat plastic waste accumulation. Here, we report that saliva Galleria mellonella larvae (wax worms) is capable oxidizing and depolymerizing polyethylene (PE), one most produced sturdy polyolefin-derived plastics. This effect achieved after few hours' exposure at room temperature under physiological conditions (neutral pH). The wax worm can overcome bottleneck step in PE biodegradation, namely initial oxidation step. Within saliva, identify two enzymes, belonging phenol oxidase family, reproduce same effect. To best our knowledge, these enzymes are first animal this capability, opening way potential solutions for management through bio-recycling/up-cycling.

Language: Английский

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Understanding the Structure–Activity Relationships in Catalytic Conversion of Polyolefin Plastics by Zeolite-Based Catalysts: A Critical Review

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(24), P. 14882 - 14901

Published: Nov. 23, 2022

Polyolefins, the largest used commodity plastics in world, find extensive application many fields. However, most end up landfills or incineration, leading to severe ecological crises, environmental pollution, and serious resource waste problems. As representatives on chemical upcycling of polyolefin fuels bulk/fine chemicals, catalytic cracking hydrocracking based zeolite metal/zeolite composite catalysts are considered effective paths due their large capacity strong adaptability existing petrochemical equipment. After an overview reaction mechanisms pyrolysis cracking, this review aims comprehensively discuss influence catalyst structure (acidity, pore structure, morphology) activity, selectivity, stability particularly emphasizing importance for matching acidity target product formation. Subsequently, structure–activity relationship between metal site zeolite's acid is also discussed. In end, emerging opportunities challenges proposed promote a more efficient way upcycling.

Language: Английский

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Waste-treating-waste: Upcycling discarded polyester into metal–organic framework nanorod for synergistic interfacial solar evaporation and sulfate-based advanced oxidation process

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 456, P. 140994 - 140994

Published: Dec. 16, 2022

Language: Английский

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Chemical recycling technologies for PVC waste and PVC-containing plastic waste: A review

Waste Management, Journal Year: 2023, Volume and Issue: 166, P. 245 - 258

Published: May 16, 2023

Language: Английский

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Polyethylene terephthalate (PET) recycling: A review

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100673 - 100673

Published: Feb. 23, 2024

It is difficult to reuse wastes from polymers due the mismatch between amount of contaminants and secondary quality feed. This type operation much more expensive cost-effective than production polymer raw materials latest materials. However, recyclable beneficial if used extensively in various concrete products wood-polymer boards. done only cleaning sorting are not particularly important for products. Polyethylene terephthalate (PET) a widely industries its excellent physical chemical properties. Besides, increasing use PET has led global crisis waste management, as improper disposal caused significant environmental damage. major source accumulated landfills, address this issue, recycling methods have evolved. In regard, present review examines techniques involved PET. Conventional influence diverse depolymerization reaction variables were discussed, upsides downsides each technique considered. The summarizes advances technologies plastic waste, focusing on bio-recycling PET, aiming sustainable, economical solutions circular economy.

Language: Английский

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Research and progress of chemical depolymerization of waste PET and high-value application of its depolymerization products

RSC Advances, Journal Year: 2022, Volume and Issue: 12(49), P. 31564 - 31576

Published: Jan. 1, 2022

PET (polyethylene terephthalate) has good transparency, corrosion resistance, gas barrier properties and mechanical properties, is widely used in beverage bottles, fabrics, food packaging, tires, films, engineering plastics other fields.

Language: Английский

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“Functional upcycling” of polymer waste towards the design of new materials

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(14), P. 4755 - 4832

Published: Jan. 1, 2023

Diversification of polymer waste recycling is one the solutions to improve current environmental scenario. Upcycling a promising strategy for converting into molecular intermediates and high-value products. Although catalytic transformations small molecules have been actively discussed, methods characteristics upcycling new materials not yet addressed. Recently, functionalisation wastes (polyethylene terephthalate bottles, polypropylene surgical masks, rubber tires, etc.) their conversion with enhanced functionality proposed as an appealing alternative dealing recycling/treatment. In this review, term 'functional upcycling' introduced designate any method post-polymerisation modification or surface without considerable chain destruction produce upcycled material added value. This review explores functional detailed consideration most common polymers, i.e., polystyrene, poly(methyl methacrylate), polyethylene, polypropylene, polyurethane, polyethylene terephthalate, polyvinyl chloride, polycarbonate, rubber. We discuss composition plastic waste, reactivity, available physical/chemical agents modification, interconnection between properties application. To date, successfully applied adsorbents (including CO2), catalysts, electrode energy storage sensing, demonstrating high Importantly, reviewed reports indicated that specific performance generally comparable higher than similar prepared from virgin feedstock. All these advantages promote diversification approach against postprocessing employed waste. Finally, identify limitations suggest future scope research each polymer, we comparatively analysed aspects those chemical mechanical recycling, considering resource costs, toxicity used chemicals, footprint, value product.

Language: Английский

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Sustainable developments in polyolefin chemistry: Progress, challenges, and outlook

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101713 - 101713

Published: June 25, 2023

Language: Английский

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Recent advances in plastic recycling and upgrading under mild conditions

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(18), P. 6949 - 6970

Published: Jan. 1, 2023

This review summarizes the emerging advanced technologies including bio-, photo-, electro-, and low-temperature thermocatalysis for recycling upgrading of waste plastics under mild conditions.

Language: Английский

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