The degradation of single-use plastics and commercially viable bioplastics in the environment: A review

Environmental Research, Год журнала: 2023, Номер 231, С. 115988 - 115988

Опубликована: Апрель 25, 2023

Язык: Английский

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Distribution and removal mechanism of microplastics in urban wastewater plants systems via different processes

Environmental Pollution, Год журнала: 2023, Номер 320, С. 121076 - 121076

Опубликована: Янв. 12, 2023

Язык: Английский

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Microbial degradation of low-density polyethylene (LDPE) and polystyrene using Bacillus cereus (OR268710) isolated from plastic-polluted tropical coastal environment

The Science of The Total Environment, Год журнала: 2024, Номер 924, С. 171580 - 171580

Опубликована: Март 9, 2024

Язык: Английский

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Recent progress in biodegradation of microplastics by Aspergillus sp. in aquatic environments

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

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Microplastics, their abundance, and distribution in water and sediments in North Chennai, India: An assessment of pollution risk and human health impacts

Journal of Contaminant Hydrology, Год журнала: 2024, Номер 263, С. 104339 - 104339

Опубликована: Март 27, 2024

Язык: Английский

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State-of-the-art strategies for microplastics mitigation in aquatic environments: Identification, technological innovations, and prospects for advancement

Journal of Water Process Engineering, Год журнала: 2024, Номер 61, С. 105336 - 105336

Опубликована: Апрель 23, 2024

Язык: Английский

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Biodegradation of polyethylene (PE), polypropylene (PP), and polystyrene (PS) microplastics by floc-forming bacteria, Bacillus cereus strain SHBF2, isolated from a commercial aquafarm

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(22), С. 32225 - 32245

Опубликована: Апрель 22, 2024

Язык: Английский

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Freshwater plastisphere: a review on biodiversity, risks, and biodegradation potential with implications for the aquatic ecosystem health

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Апрель 18, 2024

The plastisphere, a unique microbial biofilm community colonizing plastic debris and microplastics (MPs) in aquatic environments, has attracted increasing attention owing to its ecological public health implications. This review consolidates current state of knowledge on freshwater focussing biodiversity, assembly, interactions with environmental factors. Current biomolecular approaches revealed variety prokaryotic eukaryotic taxa associated surfaces. Despite their importance, the presence potentially pathogenic bacteria mobile genetic elements (i.e., antibiotic resistance genes) raises concerns for ecosystem human health. However, extent these risks implications remain unclear. Advanced sequencing technologies are promising elucidating functions particularly biodegradation processes. Overall, this emphasizes need comprehensive studies understand plastisphere dynamics support effective management strategies mitigate impact pollution resources.

Язык: Английский

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Efficient biodegradation of Polyethylene terephthalate (PET) plastic by Gordonia sp. CN2K isolated from plastic contaminated environment

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 281, С. 116635 - 116635

Опубликована: Июнь 29, 2024

Since we rely entirely on plastics or their products in our daily lives, are the invention of hour. Polyester plastics, such as Polyethylene Terephthalate (PET), among most often used types plastics. PET have a high ratio aromatic components, which makes them very resistant to microbial attack and highly persistent. As result, massive amounts plastic trash accumulate environment, where they eventually transform into microplastic (<5 mm). Rather than macroplastics, microplastics starting pose serious hazard environment. It is imperative that these polymer be broken down. Through use enrichment culture, microplastic-degrading bacterium was isolated from solid waste management yards. Bacterial strain identified Gordonia sp. CN2K by 16 S rDNA sequence analysis biochemical characterization. able polyethylene terephthalate its only energy carbon source. In 45 days, 40.43 % degraded. By using mass spectral HPLC characterize metabolites produced during breakdown, degradation verified. The spent medium included dimer compound, bis (2-hydroxyethyl) (BHET), mono (MHET), terephthalate. Furthermore, sheet exposed culture showed considerable surface alterations scanning electron microscope images. This illustrates how new current work is.

Язык: Английский

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Mechanisms of Polyethylene Terephthalate Pellet Fragmentation into Nanoplastics and Assimilable Carbons by Wastewater Comamonas

Environmental Science & Technology, Год журнала: 2024, Номер 58(43), С. 19338 - 19352

Опубликована: Окт. 3, 2024

Comamonadaceae bacteria are enriched on poly(ethylene terephthalate) (PET) microplastics in wastewaters and urban rivers, but the PET-degrading mechanisms remain unclear. Here, we investigated these with Comamonas testosteroniKF-1, a wastewater isolate, by combining microscopy, spectroscopy, proteomics, protein modeling, genetic engineering. Compared to minor dents PET films, scanning electron microscopy revealed significant fragmentation of pellets, resulting 3.5-fold increase abundance small nanoparticles (<100 nm) during 30-day cultivation. Infrared spectroscopy captured primarily hydrolytic cleavage fragmented pellet particles. Solution analysis further demonstrated double hydrolysis oligomer, bis(2-hydroxyethyl) terephthalate, bioavailable monomer terephthalate. Supplementation acetate, common co-substrate, promoted cell growth fragmentation. Of multiple hydrolases encoded genome, intracellular proteomics detected only one, which was found both acetate-only PET-only conditions. Homology modeling this hydrolase structure illustrated substrate binding analogous reported hydrolases, despite dissimilar sequences. Mutants lacking gene were incapable oligomer had 21% decrease fragmentation; re-insertion restored functions. Thus, have identified constitutive production key Comamonas, could be exploited for plastic bioconversion.

Язык: Английский

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