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61,005 resultsShowing papers similar to A focused review on recycling and hydrolysis techniques of polyethylene terephthalate
ClearResearch progress on chemical depolymerization and upcycling of PET waste plastics
This review examines recent advances in chemical methods for breaking down polyethylene terephthalate (PET) waste plastics into useful raw materials. Researchers surveyed techniques including glycolysis, methanolysis, hydrolysis, and aminolysis that can convert PET back into monomers for reuse. The study highlights chemical depolymerization as a promising approach to reduce plastic pollution while recovering valuable materials from waste.
Microbial degradation of polyethylene terephthalate: a systematic review
This systematic review examines how microorganisms like bacteria and fungi can break down PET plastic, one of the most common types of plastic waste. The research identifies several promising biological approaches that could help reduce plastic pollution without the harmful side effects of chemical recycling methods. Finding better ways to break down plastic waste is critical for reducing the microplastics that end up in our water, food, and bodies.
Recent advances in catalytic hydrogenolysis of polyester
This review summarises a decade of research into chemically recycling polyester plastic waste (especially PET) by breaking its polymer chains using hydrogen gas — a process called hydrogenolysis — to recover valuable chemical building blocks. Different catalysts allow scientists to target different chemical bonds in PET, yielding products like aromatic hydrocarbons, glycols, or terephthalic acid under varying conditions. Developing efficient chemical recycling pathways is directly relevant to reducing plastic waste and the microplastic pollution that results from improperly disposed plastics.
A review on microbial bioremediation of polyethylene terephthalate microplastics
This review focuses on microbial biodegradation of PET microplastics — the plastic used in bottles and synthetic textiles — detailing the specific enzymes (PETase and MHETase) that bacteria use to break the polymer down into its chemical building blocks. Biological degradation offers a lower-energy, more environmentally gentle alternative to chemical recycling or landfill, and understanding the microbial mechanisms involved is key to developing scalable bioremediation solutions for one of the most pervasive microplastic types.
Structural decay of poly(ethylene terephthalate) by enzymatic degradation
Researchers examined the structural decay of poly(ethylene terephthalate) through enzymatic degradation as a sustainable recycling strategy, finding this approach requires neither energy nor harsh solvents, offering a promising path for addressing microplastic pollution from PET products.
Sustainable Management of Microplastic Pollutions from PET Bottles: Overview and Mitigation Strategies
Researchers reviewed the environmental impact of PET bottle degradation and strategies for managing the resulting microplastic pollution. The study highlights that PET bottle usage continues to grow, and its breakdown releases low-molecular-weight compounds and microplastics, while outlining mitigation approaches including improved recycling and waste management practices.
Strategies for Electrochemical Recycling of Plastic Polyethylene Terephthalate‐Derived Ethylene Glycol Into High‐Value Chemicals
This paper reviews new methods for recycling PET plastic waste, the most common plastic in bottles and packaging, using electricity from renewable sources. By converting PET-derived chemicals into high-value products through electrocatalysis, this approach could help reduce both plastic pollution and microplastic contamination in the environment.
Recent Progress in Polyolefin Plastic: Polyethylene and Polypropylene Transformation and Depolymerization Techniques
This review covers new methods for breaking down polyethylene and polypropylene, the two most common types of plastic, into reusable materials. Since mechanical recycling only handles a small fraction of plastic waste, chemical approaches like pyrolysis and hydrogenolysis offer more promising solutions. These techniques are important because the breakdown of these same plastics into microplastics is a major source of environmental and health contamination.
Comparsion of Catalyst Effectiveness in Different Chemical Depolymerization Methods of Poly(ethylene terephthalate)
This review compares the effectiveness of different catalysts used in chemical recycling methods for polyethylene terephthalate (PET) plastic. The study covers hydrolysis, methanolysis, glycolysis, and other depolymerization approaches, comparing key process parameters like temperature, reaction time, and yields to help identify the most efficient PET recycling strategies.
Enzymatic PET Degradation
This review examines enzymatic degradation of PET (polyethylene terephthalate), the plastic used in bottles and polyester clothing, as a promising pathway for breaking down this persistent polymer. Advances in engineering more efficient PET-degrading enzymes could enable industrial-scale biological recycling and reduce the environmental accumulation of PET microplastics.
СУЧАСНЕ УЯВЛЕННЯ ПРО ПЕРЕБІГ ПРОЦЕСІВ ДЕСТРУКЦІЇ ПОЛІЕТИЛЕНТЕРЕФТАЛАТУ
This Ukrainian review summarizes current understanding of PET (polyethylene terephthalate) degradation mechanisms, including hydrolysis, thermal, photodegradation, and mechanical breakdown. Understanding how PET degrades is important because it is one of the most abundant plastics that fragments into microplastics in the environment.
Development of Enzyme-Based Approaches for Recycling PET on an Industrial Scale
This paper reviews the development of enzyme-based methods for breaking down PET plastic (used in bottles and packaging) at an industrial scale. While enzymatic recycling is a promising solution to plastic waste, current methods are still too slow and costly for widespread use. Improving these technologies could help reduce the enormous amount of PET entering the environment and breaking down into microplastics.
Enzymatic Remediation of Polyethylene Terephthalate (PET)–Based Polymers for Effective Management of Plastic Wastes: An Overview
Enzymatic approaches for remediating PET-based plastic waste were reviewed, covering PETase and related enzymes that can break PET into reusable monomers. Enzyme engineering strategies to improve thermostability and catalytic efficiency are discussed as a pathway to scalable biological PET recycling.
Microbial enzymes for the recycling of recalcitrant petroleum‐based plastics: how far are we?
This review examines the progress in identifying microbial enzymes capable of breaking down petroleum-based plastics like polyethylene, polystyrene, polyurethane, and PET. Researchers highlight recent advances in using polyester-degrading enzymes to recover raw materials from PET waste through biocatalytic recycling. The study discusses the potential and remaining challenges of using biological approaches to address the growing global problem of plastic waste accumulation.
Determinants for an Efficient Enzymatic Catalysis in Poly(Ethylene Terephthalate) Degradation
This review covers the current state of enzymatic PET degradation, examining which enzymes act on PET, how protein engineering has improved their activity, and what challenges remain before enzymatic recycling can be deployed at industrial scale.
Current Knowledge on Polyethylene Terephthalate Degradation by Genetically Modified Microorganisms
This review covers genetically modified microorganisms engineered to degrade polyethylene terephthalate, examining how bioengineering of enzymes such as PETase and enhanced expression systems can overcome the low biodegradation rates of wild-type microorganisms toward this ubiquitous plastic.
Engineered polyethylene terephthalate hydrolases: perspectives and limits
This review examines progress in engineering enzymes that can break down PET plastic, the material used in most beverage bottles and synthetic textiles. Researchers found that while significant advances have been made through protein engineering and machine learning, no enzyme yet exists that can efficiently degrade the crystalline form of PET found in real-world waste. The study outlines the key challenges remaining before enzymatic plastic recycling can work at industrial scale, including handling microplastic contamination.
Enzymatic Degradation of PET plastic
This study tested commercial-grade enzymes for degrading PET plastic and found that enzymatic degradation was effective at laboratory scale but faced challenges for real-world application. Scaling up enzymatic PET recycling could reduce the persistence of plastic waste that eventually fragments into microplastics in the environment.
Microbial Degradation of Plastic Polymers
This review examines microbial degradation pathways for common synthetic plastics including polyethylene, polypropylene, polystyrene, PVC, polyurethane, and PET, describing how mechanical and biological processes fragment plastics into microplastics and how microorganisms can be leveraged to address plastic pollution in aquatic and terrestrial environments.
Occurrence, analysis, and toxicity of polyethylene terephthalate microplastics: a review
This review focuses on polyethylene terephthalate (PET), one of the most common types of plastic found as microplastic contamination in food, beverages, dust, wildlife, and human tissues. The authors found major inconsistencies in how researchers measure and detect PET microplastics, making it difficult to accurately assess health risks. Better standardized methods are needed to understand the true scope of PET contamination.
Recent advances in enzyme engineering for improved deconstruction of poly(ethylene terephthalate) (PET) plastics
This review covers recent progress in engineering enzymes that can break down PET plastic, the material used in water bottles and food containers. While natural enzymes that digest PET have been discovered, they are not yet fast or durable enough for industrial-scale recycling. Advances in protein engineering, directed evolution, and computational design are steadily improving these enzymes, which could eventually provide a sustainable way to recycle PET and reduce microplastic pollution at its source.
Chemical Recycling of Polyethylene Terephthalate (PET) Driven by the Use of Protic Ionic Liquids: A Strategy to Mitigate Microplastic Pollution
Researchers explored using environmentally friendly ionic liquids to chemically recycle PET microplastics through hydrolysis, recovering the raw material terephthalic acid. The most effective ionic liquid achieved over 80% PET conversion under relatively mild conditions compared to traditional chemical recycling methods. The study suggests that protic ionic liquids could offer a sustainable, less hazardous approach to breaking down PET microplastic waste.
Perspectives on the Role of Enzymatic Biocatalysis for the Degradation of Plastic PET
This review discusses the role of enzymatic biocatalysis in PET plastic degradation, examining how the discovery of PETase and subsequent enzyme engineering have advanced biodegradation as an alternative to chemical and mechanical recycling for one of the most produced plastics globally.
An efficient strategy to tailor PET hydrolase: Simple preparation with high yield and enhanced hydrolysis to micro-nano plastics
This study developed a simplified, high-yield preparation method for PET-degrading hydrolase enzymes to improve their ability to break down PET nano- and microplastics. The engineered enzyme showed enhanced hydrolysis activity against PET microplastics, offering a more practical route to enzymatic plastic waste treatment.