ASSESSMENT OF THE BIODEGRADABILITY OF POLYLACTIC ACID (PLA) IN FRESHWATER USING EN ISO 14851:2019: CHALLENGES AND OUTCOMES DOI
Valentina Poli, Maria Cristina Lavagnolo, Marina Basaglia

и другие.

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137974 - 137974

Опубликована: Март 1, 2025

Язык: Английский

Microbial Enzyme Biotechnology to Reach Plastic Waste Circularity: Current Status, Problems and Perspectives DOI Open Access
Marco Orlando, Gianluca Molla, Pietro Castellani

и другие.

International Journal of Molecular Sciences, Год журнала: 2023, Номер 24(4), С. 3877 - 3877

Опубликована: Фев. 15, 2023

The accumulation of synthetic plastic waste in the environment has become a global concern. Microbial enzymes (purified or as whole-cell biocatalysts) represent emerging biotechnological tools for circularity; they can depolymerize materials into reusable building blocks, but their contribution must be considered within context present management practices. This review reports on prospective bio-recycling framework Europe. Available biotechnology support polyethylene terephthalate (PET) recycling. However, PET represents only ≈7% unrecycled waste. Polyurethanes, principal fraction, together with other thermosets and more recalcitrant thermoplastics (e.g., polyolefins) are next plausible target enzyme-based depolymerization, even if this process is currently effective ideal polyester-based polymers. To extend to circularity, optimization collection sorting systems should feed chemoenzymatic technologies treatment mixed In addition, new bio-based lower environmental impact comparison approaches developed (available new) materials, that designed required durability being susceptible action enzymes.

Язык: Английский

Процитировано

54

Recent Advances in Catalytic Chemical Recycling of Polyolefins DOI Creative Commons
Kirill Faust,

Peter Denifl,

Marko Hapke

и другие.

ChemCatChem, Год журнала: 2023, Номер 15(13)

Опубликована: Март 29, 2023

Abstract Polyolefins and especially polyethylenes (LLDPE, LDPE HDPE) polypropylene (PP) contribute a great deal to the growing amounts of plastic waste with combined production share almost 50 % by mass. While being universally applicable, they are mainly used for short‐lived packaging materials that constitute over 60 annual post‐consumer waste. Thus, disproportionately high polyolefins end up as (PCW) management strategies these particularly inert plastics needed. This necessity has promoted research effort dealing valorization discarded but, nevertheless, valuable materials. review aims highlight scientific advances made in chemical polyolefin recycling recent years, focusing, though not exclusively, on catalytic processes recycle various means at more moderate temperatures compared pyrolysis such deconstructing polymer objective upcycling mind or transformation give access functional chemicals.

Язык: Английский

Процитировано

52

Advances in microbial exoenzymes bioengineering for improvement of bioplastics degradation DOI Creative Commons
Farzad Rahmati, Debadatta Sethi, Weixi Shu

и другие.

Chemosphere, Год журнала: 2024, Номер 355, С. 141749 - 141749

Опубликована: Март 21, 2024

Plastic pollution has become a major global concern, posing numerous challenges for the environment and wildlife. Most conventional ways of plastics degradation are inefficient cause great damage to ecosystems. The development biodegradable offers promising solution waste management. These designed break down under various conditions, opening up new possibilities mitigate negative impact traditional plastics. Microbes, including bacteria fungi, play crucial role in bioplastics by producing secreting extracellular enzymes, such as cutinase, lipases, proteases. However, these microbial enzymes sensitive extreme environmental temperature acidity, affecting their functions stability. To address challenges, scientists have employed protein engineering immobilization techniques enhance enzyme stability predict structures. Strategies improving substrate interaction, increasing thermostability, reinforcing bonding between active site substrate, refining activity being utilized boost functionality. Recently, bioengineering through gene cloning expression potential microorganisms, revolutionized biodegradation bioplastics. This review aimed discuss most recent strategies modifying bioplastic-degrading terms functionality, thermostability enhancement, binding site, with other improvement surface action. Additionally, discovered exoenzymes metagenomics were emphasized.

Язык: Английский

Процитировано

26

Process insights for harnessing biotechnology for plastic depolymerization DOI
Ren Wei, Gert Weber, Lars M. Blank

и другие.

Nature Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Язык: Английский

Процитировано

3

Recent progress in biodegradation of microplastics by Aspergillus sp. in aquatic environments DOI Creative Commons
Afsaneh Esmaeili Nasrabadi, Bahman Ramavandi, Ziaeddin Bonyadi

и другие.

Colloids and Interface Science Communications, Год журнала: 2023, Номер 57, С. 100754 - 100754

Опубликована: Ноя. 1, 2023

The potential of Aspergillus sp. for plastic biodegradation is a promising approach environmentally friendly waste management. Various research studies have been conducted to optimize conditions that enhance the plastics and understand genetic basis species. By performing this investigation, we discussed role various species in decomposition polymers. Most grow within pH range 4 6. 37.5% showed grows optimally at 30 °C. Scanning electron microscopy (SEM) Fourier transform infrared (FTIR) tests were used 34.61% 32.69% different studies, respectively. It has observed fungi can biodegrade polymers more effectively size 20–100 μm. (34.21%) focused on 21 days. highest percentage (44%) low-density polyethylene (LDPE) by dominant sp., including A. niger, flavus, oryzae, play significant microplastics. Enzymes such as laccase, esterase, peroxidase, lipase, urease crucial roles degradation plastics. Laccase utilizes oxygen generate reactive species, breaking polymer chains. Esterase cleaves into fragments, while peroxidase generates radicals degradation. Lipases also contribute specific substrates. In general, it be said fungal successful degrading

Язык: Английский

Процитировано

39

Biodegradability of bioplastics in different aquatic environments: A systematic review DOI Creative Commons
Maria Cristina Lavagnolo, Valentina Poli,

Anna Maria Zampini

и другие.

Journal of Environmental Sciences, Год журнала: 2023, Номер 142, С. 169 - 181

Опубликована: Июнь 19, 2023

Bioplastics were first introduced as environmentally friendly materials, with properties similar to those of conventional plastics. A bioplastic is defined biodegradable if it can be decomposed into carbon dioxide under aerobic degradation, or methane and CO2 anaerobic conditions, inorganic compounds, new cellular biomass, by the action naturally occurring microorganisms. This definition however does not provide any information on environmental timescale extent at which decomposition processes should occur. With regard aquatic environment, recognized standards have been established assess ability plastics undergo biodegradation; however, these fail clear targets met allow labelling a biodegradable. Moreover, grant user an extensive leeway in choice process parameters. For reasons, comparison results deriving from different studies challenging. The authors analysed discussed degree biodegradability series bioplastics environments (both fresh salt water) using obtained laboratory on-site testing context research studies. Biochemical Oxygen Demand (BOD), evolution, surface erosion weight loss main parameters used researchers describe percentage biodegradation. showed large variability both BOD, even when evaluating same type bioplastics. confirms need for reference range values applied defining

Язык: Английский

Процитировано

33

Oxidative degradation of polyethylene by two novel laccase-like multicopper oxidases from Rhodococcus opacus R7. DOI Creative Commons
Jessica Zampolli, Marco Mangiagalli, Daniele Vezzini

и другие.

Environmental Technology & Innovation, Год журнала: 2023, Номер 32, С. 103273 - 103273

Опубликована: Июль 7, 2023

The production of synthetic plastics, especially polyethylene, has reached a crucial level, making highly challenging plastic waste management. This paper aims to elucidate the role two novel laccase-like multicopper oxidases in polyethylene oxidative degradation based on transcriptomic data from Rhodococcus opacus R7 grown polyethylene. purification recombinant proteins, LMCO2 and LMCO3 belonging respectively three- two-domains laccase families, showed that they are endowed with different functional features. highest enzyme activity at 65 °C an optimal pH 7.0, while exhibited 80 acidic pH. LMCOs both phenolic (i.e., 2,6-DMP) non-phenolic ABTS) compounds were thermostable. untreated low-density was assessed by combining Fourier transform infrared spectroscopy gas chromatography coupled mass spectrometry analyses. Oxidation PE recorded within short time range (24-48 h) revealed previously not described patterns alkyl oxygenated products including ketones, alcohols, carboxylic acids. Structural analysis together density theory calculations allowed identify structural electronic elements presumably involved oxidation

Язык: Английский

Процитировано

33

Microbial Bioremediation Technology for Sustainable Treatment and Management of Synthetic Microfiber Waste DOI

Akankshya Das,

Sudeshna Dey, Kiran Bala

и другие.

Опубликована: Янв. 1, 2024

Язык: Английский

Процитировано

15

Role of Microplastics in Global Warming and Climate Change: A Review DOI Creative Commons
Md. Sohel Parvez, Hadayet Ullah, Omar Faruk

и другие.

Water Air & Soil Pollution, Год журнала: 2024, Номер 235(3)

Опубликована: Март 1, 2024

Abstract Microplastics (MPs) have become an important concern among scientists and policymakers all around the globe. Despite this, contribution of MPs to global warming climate change, a significant aspect issue, has been overlooked. Continuous greenhouse gas (GHG) emissions resulting in change long major issue with apparent consequences. Climate plastic crises are threatening our planet, co-occurrence both would be catastrophic. This article addressed links between microplastic pollution change; how contribute by interacting water, air, soil; recommendations address issues together. Throughout their lives, plastics emit GHG. water impede mitigation potential ocean different ways; they hamper photosynthesis carbon sequestration phytoplankton Blue Carbon Ecosystem. induce GHG from soil. Airborne aid cloud formation interfere atmospheric cooling. change–induced extreme events redistribute environment, causing increase vertically horizontally, which then aggravates situation feedback loop. The evidence acquired study implies that inextricably linked play vital role fueling change. bridges gap were previously regarded separately. Due linkages these intertwined challenges, integrated holistic research policy measures required concurrently.

Язык: Английский

Процитировано

13

Comprehensive meta-analysis reveals the impact of non-biodegradable plastic pollution on methane production in anaerobic digestion DOI Creative Commons
Zhenghui Gao,

Hang Qian,

Tianyi Cui

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер 484, С. 149703 - 149703

Опубликована: Фев. 17, 2024

Язык: Английский

Процитировано

11