Metal-catalyzed plastic depolymerization

Cell Reports Physical Science, Год журнала: 2023, Номер 4(5), С. 101341 - 101341

Опубликована: Март 29, 2023

Polymers have become an indispensable part of our daily lives, and today we produce around 370 MT plastic per year. Only about 20% it is being recycled, the rest, 80%, unleashed into environment without appropriate treatment. This calls forth evaluation strategies available for mitigating menace "after-use" waste. Various approaches evolved over a decade are at different levels development. Plastic depolymerization upcycling considered some most prominent long-term solutions. The metal-catalyzed waste to chemical feedstocks has emerged as one promising ways address global pollution. Therefore, this review aims examine methods, notify recent progress, pinpoint current gaps, gauge potential strategy. Both homogeneous heterogeneous catalysts been reported depolymerize various polymers last decade. Considerable advances in metal-mediated polyolefins, polyesters, polycarbonates, polyurethanes, polyamides, polyethers. above produces monomers or intermediates, which can be used again polymerization thus brings back circularity. overview debates usage high temperatures, sophisticated ligands, expensive metals, stoichiometric reagents, etc., depolymerization. Thus, summarizes understanding fundamental science depolymerization, remaining scientific challenges, opportunities.

Язык: Английский

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Risk perception and risk realities in forming legally binding agreements: The governance of plastics

Environmental Science & Policy, Год журнала: 2022, Номер 134, С. 67 - 74

Опубликована: Апрель 20, 2022

The effectiveness of a legally binding treaty to manage plastic pollution will depend on how people perceive the risk problem in terms both whether and much they fear it. Plastic caught attention global public owing uncertainty surrounding potential human health impacts. Despite an initial concern about exposure, especially microplastics, scientific evidence started emerging that risks ingesting even inhaling microplastic was relatively small, suggesting low levels personal risk. Still, at UNEA5 Nairobi 2022, resolution passed start negotiations towards agreement for governance plastics throughout its life cycle. We compare trajectory marine as environmental issue with other challenges do comparative analysis using culture theory assess individual perception worldviews inform collective attitudes governance. conclude by considering different perceptions may have changed when more knowledge became available concerning implications microplastics breaking down further into nanoplastics being registered blood samples. argue this contributed shifting given requisite push coordinated material.

Язык: Английский

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Sources, Degradation, Ingestion and Effects of Microplastics on Humans: A Review

Toxics, Год журнала: 2023, Номер 11(9), С. 747 - 747

Опубликована: Сен. 1, 2023

Celluloid, the predecessor to plastic, was synthesized in 1869, and due technological advancements, plastic products appear be ubiquitous daily life. The massive production, rampant usage, inadequate disposal of have led severe environmental pollution. Consequently, reducing employment has emerged as a pressing concern for governments globally. This review explores microplastics, including their origins, absorption, harmful effects on environment humans. Several methods exist breaking down plastics, thermal, mechanical, light, catalytic, biological processes. Despite these methods, microplastics (MPs, between 1 5 mm size) continue produced during degradation. Acknowledging significant threat that MPs pose human health is imperative. form pollution pervasive air food infiltrates our bodies through ingestion, inhalation, or skin contact. It essential assess potential hazards can introduce. There evidence suggesting may negative impacts different areas health. These include respiratory, gastrointestinal, immune, nervous, reproductive systems, liver organs, skin, even placenta placental barrier. encouraging see most countries taken steps regulate particles. measures aim reduce which today. At same time, this summarizes degradation mechanism impact health, reduction policies worldwide. provides valuable information future research regulatory development.

Язык: Английский

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It takes two to tango: the second session of negotiations (INC-2) for a global treaty to end plastic pollution

Journal of Environmental Studies and Sciences, Год журнала: 2024, Номер 14(2), С. 428 - 434

Опубликована: Март 20, 2024

Abstract The United Nations (UN) Intergovernmental Negotiating Committee (INC) has completed its second round of negotiations on a new international legally binding instrument to ‘end plastic pollution’. This paper examines the results session negotiations, which took place May 29–June 2, 2023, and analyses trends, barriers, themes shaping emerging instrument. considers discussion surrounding Options Paper as presented by INC Secretariat Environmental Program based upon written submissions received UN member states prior negotiations. These include potential elements future treaty text may include—namely objectives, core obligations, implementation monitoring measures. At progress towards consensus these items was severely lacking. We draw close observations via event ethnography participants during document analysis. conclude looking third discussing ongoing ‘dance’ sorts are being asked like-minded groups contribute zero draft text.

Язык: Английский

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The suspension stability of nanoplastics in aquatic environments revealed using meta-analysis and machine learning

Journal of Hazardous Materials, Год журнала: 2024, Номер 471, С. 134426 - 134426

Опубликована: Апрель 26, 2024

Язык: Английский

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Fishing plastic waste: Knowns and known unknowns

Marine Pollution Bulletin, Год журнала: 2024, Номер 205, С. 116530 - 116530

Опубликована: Июнь 12, 2024

Plastics entering the marine environment primarily originate from land-based sources, prompting significant attention on single-use plastic packaging.However, fishing waste also contributes substantially to pollution, though it is often overlooked in literature due challenges pinpointing pollution sources.This study addresses this key knowledge gap by synthesizing existing explore and document knowns known unknowns surrounding waste's environmental, health, socio-economic impacts.Through development of a causal loop diagram, offers preliminary understanding issue, serving as foundation for deeper exploration complexities within industry's dynamics.Finally, highlights that short-sighted views approaches are likely lead systemic failures.Therefore, advocates strategic meaningful measures tackle emphasizing critical importance holistic integrated various streams infiltrating polluting our oceans.

Язык: Английский

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Comprehensive analysis of bioplastics: life cycle assessment, waste management, biodiversity impact, and sustainable mitigation strategies

PeerJ, Год журнала: 2024, Номер 12, С. e18013 - e18013

Опубликована: Сен. 11, 2024

Bioplastics are emerging as a promising alternative to traditional plastics, driven by the need for more sustainable options. This review article offers an in-depth analysis of entire life cycle bioplastics, from raw material cultivation manufacturing and disposal, with focus on environmental impacts at each stage. It emphasizes significance adopting agricultural practices selecting appropriate feedstock improve outcomes. The highlights detrimental effects unsustainable farming methods, such pesticide use deforestation, which can lead soil erosion, water pollution, habitat destruction, increased greenhouse gas emissions. To address these challenges, advocates efficient extraction techniques renewable energy sources, prioritizing considerations throughout production process. Furthermore, methods reducing consumption, usage, chemical inputs during implementing eco-friendly technologies. stresses importance developing robust disposal systems biodegradable materials supports recycling initiatives minimize new resources. holistic approach sustainability, including responsible cultivation, practices, effective end-of-life management. underscores evaluate potential bioplastics reduce plastic considering technological advancements, infrastructure development, consumer awareness. Future research should enhancing understanding long-term ecological impacts, advancing technology better performance compatibility. comprehensive bioplastics' footprint urgent solutions in production.

Язык: Английский

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Microplastics in coastal and marine environments: A critical issue of plastic pollution on marine organisms, seafood contaminations, and human health implications

Journal of Hazardous Materials Advances, Год журнала: 2025, Номер unknown, С. 100663 - 100663

Опубликована: Фев. 1, 2025

Язык: Английский

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3D Drug Printing by Semi-Solid Extrusion Through Reusable Cartridges: Usability Evaluation

Journal of Pharmaceutical Innovation, Год журнала: 2025, Номер 20(1)

Опубликована: Янв. 22, 2025

Язык: Английский

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Biobased Polymers for Advanced Applications: Towards a Sustainable Future

Progress in Polymer Science, Год журнала: 2025, Номер 162, С. 101934 - 101934

Опубликована: Фев. 21, 2025

Язык: Английский

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