Plastic waste impact and biotechnology: Exploring polymer degradation, microbial role, and sustainable development implications

Bioresource Technology Reports, Journal Year: 2023, Volume and Issue: 24, P. 101606 - 101606

Published: Aug. 28, 2023

The significant impact of plastic waste on ecosystems has raised concerns regarding its detrimental effects. This review examines the various types synthetic and degradable plastics explores physiochemical properties polymers during degradation. It delves into management waste, considering both abiotic biotic degradation mechanisms. Biotic degradation, including aerobic anaerobic pathways, is also examined, with a specific focus role microorganisms their enzymes in facilitating biodegradation. further biotechnological implications management, gene manipulation, genetic modification, potential biotechnology. emphasizes importance transitioning toward circular economy highlights alignment these efforts sustainable development goals (SDGs). Overall, this provides insights environment, mechanisms, discusses approaches practices aimed at addressing challenges posed by waste.

Language: Английский

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The escalated potential of the novel isolate Bacillus cereus NJD1 for effective biodegradation of LDPE films without pre-treatment

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 455, P. 131623 - 131623

Published: May 12, 2023

Language: Английский

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Degradation of low-density polyethylene by the bacterium Rhodococcus sp. C-2 isolated from seawater

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 907, P. 167993 - 167993

Published: Oct. 21, 2023

Low-density polyethylene (LDPE), which accounts for 20% of the global plastic production, is discharged in great quantities into ocean, threatening marine life and ecosystems. Marine microorganisms have previously been reported to degrade LDPE plastics; however, exploration strains enzymes that still limited. Here, an LDPE-degrading bacterium was isolated from seawater Changjiang Estuary, China identified as Rhodococcus sp. C-2, relative abundance dramatically enhanced during PE-degrading microbial enrichment. The strain C-2 exhibited degradation films, leading their morphological deterioration, reduced hydrophobicity tensile strength, weight loss, well formation oxygen-containing functional groups short-chain products. Sixteen bacterial potentially involved were screened using genomic, transcriptomic, product analyses. Thereinto, glutathione peroxidase GPx with exposed active sites catalyzed depolymerization cooperation its dissociated superoxide anion radicals. Furthermore, model involving multiple proposed. present study identifies a novel enzyme (PEase) bioremediation promotes understanding degradation.

Language: Английский

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A systematic review of the mechanisms underlying the interactions between microplastics and microorganism in the environment

TrAC Trends in Analytical Chemistry, Journal Year: 2024, Volume and Issue: 172, P. 117543 - 117543

Published: Feb. 2, 2024

Language: Английский

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Biodegradable plastics in Mediterranean coastal environments feature contrasting microbial succession

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 928, P. 172288 - 172288

Published: April 8, 2024

Plastic pollution of the ocean is a top environmental concern. Biodegradable plastics present potential "solution" in combating accumulation plastic pollution, and their production currently increasing. While these polymers will contribute to future marine debris budget, very little known still about behavior biodegradable different natural environments. In this study, we molecularly profiled entire microbial communities on laboratory confirmed polybutylene sebacate-co-terephthalate (PBSeT) polyhydroxybutyrate (PHB) films, non-biodegradable conventional low-density polyethylene (LDPE) films that were incubated situ three coastal environments Mediterranean Sea. Samples from pelagic, benthic, eulittoral habitat taken at five timepoints during an incubation period 22 months. We assessed presence biodegrading bacterial fungal taxa contrasted them against previously published disintegration data polymers. Scanning electron microscopy imaging complemented our molecular data. Putative degraders occurred all environments, but there was no obvious "core" shared plastic-specific microbes. varied between polymers, predominantly selected for underlying communities. Observed patterns did not necessarily match community putative degraders.

Language: Английский

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Understanding challenges associated with plastic and bacterial approach toward plastic degradation

Journal of Basic Microbiology, Journal Year: 2022, Volume and Issue: 63(3-4), P. 292 - 307

Published: Dec. 5, 2022

Abstract Plastic is widely used in every sector due to its stability, durability, and low cost. The widespread use of plastic results the compilation waste environment. buildup such a vast volume garbage has emerged as primary cause environmental pollution, including air, land, water pollution. Plastics contain various harmful chemicals toxic substances that can leak adversely affect humans other organisms. Managing this much very challenging task; therefore, an appropriate technique needed address problem. Various methods are used, chemical, physical, biological, degrade waste. Bacterial degradation known be most effective for biodegradation approach overcome issue. Biodegradation played crucial role removing these polluting wastes more efficiently eco‐friendly. process involves variety bacteria, Acinetobacter baumannii , Bacillus weihenstephanensis Pseudomonas aeruginosa fluorescens Rhodococcus ruber so on. takes place through biochemical pathways, biodeterioration, biofragmentation, assimilation, mineralization. During biodegradation, bacteria produce enzymes like esterase, cutinase, laccase, lipase, others break down transform polymers into microbial biomass gases. This review aims explain how contribute breakdown plastic.

Language: Английский

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Characterization of plastic degrading bacteria isolated from sewage wastewater

Saudi Journal of Biological Sciences, Journal Year: 2023, Volume and Issue: 30(5), P. 103628 - 103628

Published: March 23, 2023

Plastic is a fundamental polymer used in routine life and disposed of sewage. It leads to microplastic pollution aquatic organisms, introducing it into the food chain affecting human health. In present study, samples were collected from sewage wastewater isolate bacteria that could potentially reduce plastic. The six incubated with plastic pieces minimal salt media for 120 days. After days, weight loss experiment showed SH5B SH6B degraded 25% chemical molecular characterization, these strains identified as Pseudomonas sp. aeruginosa SH6B. Fourier-transform infrared spectroscopy (FTIR) analysis peaks shifting, indicating bond stretching, bending, new formation. Gas Chromatography-Mass Spectrometry (GC-MS) revealed various compounds produced during degradation by bacterial strains. biodegradation potential makes an impending foundation green chemistry eradicate tough pollutants environment.

Language: Английский

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The problem of polyethylene waste – recent attempts for its mitigation

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164629 - 164629

Published: June 5, 2023

For the past two decades, with increase in plastic consumption came a rise waste, bulk of it ending up landfills, incinerated, recycled or leaking into environment, especially aquatic ecosystems. Plastic waste poses significant environmental threat and wealth issue due to its non-biodegradability recalcitrant nature. Polyethylene (PE) remains one major utilized polymers different applications amid all other types because low production costs, simplistic nature prone be modified historically predominant researched material. Since common methods for disposal are troubled by limitations, there is growing need more appropriate environment friendly alternatives. This study highlights several ways that can used assist PE (bio)degradation mitigate impact. Biodegradation (microbiological activity driven) photodegradation (radiation most promising control. The shape material (powder, film, particles, etc.), composition medium, additives pH, temperature incubation exposure times contribute degradation efficiency. Moreover, radiation pretreatment enhance biodegradability PE, providing approach fighting pollution. paper relates results regarding studies followed weight loss analysis, surface morphology changes, oxidation degree (for photodegradation) mechanical properties assessment. All combined strategies very minimize polyethylene However, still long way go through. kinetics currently available biotic abiotic processes, complete mineralization thoroughly unseen.

Language: Английский

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Call for biotechnological approach to degrade plastic in the era of COVID-19 pandemic

Saudi Journal of Biological Sciences, Journal Year: 2023, Volume and Issue: 30(3), P. 103583 - 103583

Published: Feb. 2, 2023

Plastic pollution is a global issue and has become major concern since Coronavirus disease (COVID)-19. In developing nations, landfilling illegal waste disposal are typical ways to dispose of COVID-19-infected material. These technologies worsen plastic other human animal health problems. degrades in light heat, generating hazardous primary secondary micro-plastic. Certain bacteria can degrade artificial polymers using genes, enzymes, metabolic pathways. Microorganisms including petrochemical plastics slowly. High molecular weight, strong chemical bonds, excessive hydrophobicity reduce biodegradation. There not enough study on bacteria-plastic interactions. Synthetic biology, engineering, bioinformatics methods have been created biodegrade synthetic polymers. This review will focus how microorganisms' degrading capacity be increased recent biotechnological techniques.

Language: Английский

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Biodegradation of low-density polyethylene film by two bacteria isolated from plastic debris in coastal beach

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 278, P. 116445 - 116445

Published: May 10, 2024

Low-density polyethylene (LDPE) conduces massive environmental accumulation due to its high production and recalcitrance environment. In this study, We successfully enriched isolated two strains, Nitratireductor sp. Z-1 Gordonia Z-2, from coastal plastic debris capable of degrading LDPE film. After a 30-day incubation at 30 ℃, strains Z-2 decreased the weight branched-LDPE (BLDPE) film by 2.59 % 10.27 respectively. Furthermore, temperature gel permeation chromatography (HT-GPC) analysis revealed molecular reductions 7.69 (Z-1) 23.22 (Z-2) in BLDPE Scanning electron microscope (SEM) image showed presence microbial colonization perforations on film's surface. Fourier transform infrared spectroscopy (FTIR) indicated novel functional groups, such as carbonyl carbon-carbon double bonds films. During degradation, both produced extracellular reactive oxygen species (ROS). GC-MS degradation products included short-chain alkanes, alkanols, fatty acids, esters. Genomic identified numerous enzymes potentially involved chain scission. A model was proposed suggesting coordinated role between ROS biodegradation LDPE. This indicates can degrade LDPE, providing basis for deeper exploration mechanisms.

Language: Английский

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