Biofilm on microplastics in aqueous environment: Physicochemical properties and environmental implications

Journal of Hazardous Materials, Год журнала: 2021, Номер 424, С. 127286 - 127286

Опубликована: Сен. 21, 2021

Язык: Английский

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How to Build a Microplastics‐Free Environment: Strategies for Microplastics Degradation and Plastics Recycling

Advanced Science, Год журнала: 2022, Номер 9(6)

Опубликована: Янв. 6, 2022

Microplastics are an emergent yet critical issue for the environment because of high degradation resistance and bioaccumulation. Unfortunately, current technologies to remove, recycle, or degrade microplastics insufficient complete elimination. In addition, fragmentation mismanaged plastic wastes in have recently been identified as a significant source microplastics. Thus, developments effective removal methods, well as, plastics recycling strategies crucial build microplastics-free environment. Herein, this review comprehensively summarizes eliminating from highlights two key aspects achieve goal: 1) Catalytic into environmentally friendly organics (carbon dioxide water); 2) catalytic upcycling monomers, fuels, valorized chemicals. The mechanisms, catalysts, feasibility, challenges these methods also discussed. Novel such photocatalysis, advanced oxidation process, biotechnology promising eco-friendly candidates transform benign valuable products. future, more effort is encouraged develop conversion products with efficiency, product selectivity, low cost under mild conditions.

Язык: Английский

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The ecology of the plastisphere: Microbial composition, function, assembly, and network in the freshwater and seawater ecosystems

Water Research, Год журнала: 2021, Номер 202, С. 117428 - 117428

Опубликована: Июль 15, 2021

Язык: Английский

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Plastics and the microbiome: impacts and solutions

Environmental Microbiome, Год журнала: 2021, Номер 16(1)

Опубликована: Янв. 20, 2021

Abstract Global plastic production has increased exponentially since manufacturing commenced in the 1950’s, including polymer types infused with diverse additives and fillers. While negative impacts of plastics are widely reported, particularly on marine vertebrates, microbial life remain poorly understood. Plastics impact microbiomes directly, exerting toxic effects, providing supplemental carbon sources acting as rafts for colonisation dispersal. Indirect consequences include environmental shading, altered compositions host communities disruption organism or community health, hormone balances immune responses. The isolation application plastic-degrading microbes substantial interest yet little evidence supports biodegradation most high molecular weight synthetic polymers. Over 400 species have been presumptively identified capable degradation, but degradation highly prevalent polymers polypropylene, nylon, polystyrene polyvinyl chloride must be treated caution; studies fail to differentiate losses caused by leaching monomers, Even where is demonstrated, such polyethylene terephthalate, ability microorganisms degrade more crystalline forms used commercial appears limited. Microbiomes frequently work conjunction abiotic factors heat light structural integrity accessibility enzymatic attack. Consequently, there remains much scope extremophile explored a source enzymes microorganisms. We propose best-practice workflow isolating reporting taxa from microbiomes, which should multiple lines supporting changes structure, mass loss, detection presumed products, along confirmation strains (and their associated genes) responsible degradation. Such approaches necessary degraders differentiated organisms only degrading labile within predominantly amorphous plastics,

Язык: Английский

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Recent advances in photocatalytic degradation of plastics and plastic-derived chemicals

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(23), С. 13402 - 13441

Опубликована: Янв. 1, 2021

Plastic products, used in almost all aspects of daily life because their low cost, durability, and portability, can be broken down into micro- nano-scale plastics, thereby increasing the risk human ingestion.

Язык: Английский

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Food or just a free ride? A meta-analysis reveals the global diversity of the Plastisphere

The ISME Journal, Год журнала: 2020, Номер 15(3), С. 789 - 806

Опубликована: Ноя. 2, 2020

Abstract It is now indisputable that plastics are ubiquitous and problematic in ecosystems globally. Many suggestions have been made about the role biofilms colonizing environment—termed “Plastisphere”—may play transportation ecological impact of these plastics. By collecting re-analyzing all raw 16S rRNA gene sequencing metadata from 2,229 samples within 35 studies, we performed first meta-analysis Plastisphere marine, freshwater, other aquatic (e.g., brackish or aquaculture) terrestrial environments. We show random forest models can be trained to differentiate between groupings environmental factors as well aspects study design, but—crucially—also when compared with control different plastic types community successional stages. Our confirms potentially biodegrading members, hydrocarbonoclastic Oceanospirillales Alteromonadales consistently more abundant than biofilm across multiple studies This indicates predilection organisms for urgent need their ability biodegrade comprehensively tested. also identified key knowledge gaps should addressed by future studies.

Язык: Английский

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Microplastic residues in wetland ecosystems: Do they truly threaten the plant-microbe-soil system?

Environment International, Год журнала: 2021, Номер 156, С. 106708 - 106708

Опубликована: Июнь 18, 2021

The ecological stress of microplastic contamination to ecosystem functioning and biota raises concerns worldwide, but the impacts microplastics on wetland ecosystems (e.g., plants, microbes, soil) have not been fully elucidated. In this study, we used a controlled pot experiment determine effects different types (PS, PVC, PP PE) growth performance soil chemical properties, enzyme systems microbial communities. Microplastics can change germination strategies seeds, there was also reduction in fresh weight plant height Bacopa sp. Chlorophyll b synthesis significantly reduced mixed treatments compared with controls. Microplastic addition caused higher concentrations reactive oxygen species which led increased lipid peroxidation activation antioxidant defence system. organic matter, potassium, total nitrogen phosphorus changed presence four forms microplastics, while pH substantially affected. had negative effect activity, for example, PS MP particles decreased sucrase activities after 40 days. results study showed that richness diversity bacterial. When exposed polystyrene algae surface. Thus, alters structure communities, resulting enrichment some special taxa involved cycling. These indicate both direct indirect plastic residues plant-microbe-soil system, has implications potential further functioning.

Язык: Английский

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Plastic Pollution, Waste Management Issues, and Circular Economy Opportunities in Rural Communities

Sustainability, Год журнала: 2021, Номер 14(1), С. 20 - 20

Опубликована: Дек. 21, 2021

Rural areas are exposed to severe environmental pollution issues fed by industrial and agricultural activities combined with poor waste sanitation management practices, struggling achieve the United Nations’ Sustainable Development Goals (SDGs) in line Agenda 2030. communities examined through a “dual approach” as both contributors receivers of plastic leakage into natural environment (through air–water–soil–biota nexus). Despite emerging trend research, this paper, we identify few studies investigating rural communities. Therefore, proxy analysis peer-reviewed literature is required outline significant gaps related regions. This work focuses on key stages such (i) effects communities, (ii) generated (iii) development sector low- middle-income countries SDGs, (iv) circular economy opportunities reduce areas. We conclude that must be involved future research help decision makers public health threats, catalyze initiatives around world, including less developed

Язык: Английский

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Biofilms Enhance the Adsorption of Toxic Contaminants on Plastic Microfibers under Environmentally Relevant Conditions

Environmental Science & Technology, Год журнала: 2021, Номер 55(13), С. 8877 - 8887

Опубликована: Июнь 21, 2021

Microplastics (MPs) exposed to the natural environment provide an ideal surface for biofilm formation, which potentially acts as a reactive phase facilitating sorption of hazardous contaminants. Until now, changes in contaminant capacity MPs due formation have not been quantified. This is first study that compared naturally aged, biofilm-covered microplastic fibers (BMFs) adsorb perfluorooctane sulfonate (PFOS) and lead (Pb) at environmentally relevant concentrations. Changes properties morphology aged (MF) were studied by area analysis, infrared spectroscopy, scanning electron microscopy. Results revealed MFs exhibited higher areas because biomass accumulation virgin samples followed order polypropylene>polyethylene>nylon>polyester. The concentrations adsorbed Pb PFOS 4–25% 20–85% varied among polymer types. increased adsorption was linked with altered hydrophobic/hydrophilic characteristics samples. Overall, present demonstrates biofilms play decisive role contaminant-plastic interactions significantly enhance vector potential toxic environmental We anticipate knowledge generated from this will help refine planetary risk assessment MPs.

Язык: Английский

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Biofilm formation and its implications on the properties and fate of microplastics in aquatic environments: A review

Journal of Hazardous Materials Advances, Год журнала: 2022, Номер 6, С. 100077 - 100077

Опубликована: Апрель 21, 2022

Particulate plastic fragments (micro and nano-plastics) in aquatic environments provide abundant solid substrates, which serve as an important habitat for a variety of microorganisms. Surfaces microplastics (MPs) exhibit hydrophobicity that facilitate the adsorption dissolved organic carbon (DOC) environment. Furthermore, MPs act substrata, well source including readily bioavailable DOC, promote formation microbial biofilms. These biofilms have varied metabolic actions govern subsequent succession micro- meso-organisms habitation MPs. The assemblage ecosystems colonising environment is often referred to “plastisphere”. Polymer type, environmental conditions, nutrient status, salinity, season, affect composition biofilm. Microbial accelerated by biofilm on particulate plastics enables movement microorganisms, especially environment, impacts transport toxicity contaminants associated with these fragments. This review paper describes processes formation, factors affecting implications mobility degradation MPs, bioavailability

Язык: Английский

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