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

Environmental Research, Journal Year: 2023, Volume and Issue: 231, P. 115988 - 115988

Published: April 25, 2023

Language: Английский

---

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

Environmental Pollution, Journal Year: 2023, Volume and Issue: 320, P. 121076 - 121076

Published: Jan. 12, 2023

Language: Английский

---

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, Journal Year: 2024, Volume and Issue: 924, P. 171580 - 171580

Published: March 9, 2024

Language: Английский

---

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

Colloids and Interface Science Communications, Journal Year: 2023, Volume and Issue: 57, P. 100754 - 100754

Published: Nov. 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

Language: Английский

---

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, Journal Year: 2024, Volume and Issue: 263, P. 104339 - 104339

Published: March 27, 2024

Language: Английский

---

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

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 61, P. 105336 - 105336

Published: April 23, 2024

Language: Английский

---

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, Journal Year: 2024, Volume and Issue: 31(22), P. 32225 - 32245

Published: April 22, 2024

Language: Английский

---

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

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: April 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.

Language: Английский

---

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

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 281, P. 116635 - 116635

Published: June 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.

Language: Английский

---

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

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(43), P. 19338 - 19352

Published: Oct. 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.

Language: Английский

---