Biodegradation of different types of microplastics: Molecular mechanism and degradation efficiency

Thakur, Babita; Singh, Jasvinder A.; Singh, Joginder; Angmo, Deachen; Vig, Adarsh Pal

doi:10.1016/j.scitotenv.2023.162912

Cited by 44 publications

(14 citation statements)

References 111 publications

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“…For example, Pseudomonas aeruginosa was reported as the dominant bacteria in LDPE degradation . They are also persistent organic pollutant (POP)-degrading bacteria, degrading polycyclic aromatic hydrocarbons (PAHs) as the carbon source. , Different types of extracellular enzymes, such as laccase and alkane hydroxylase, involve and depolymerize the PE polymer into shorter chains, such as oligomers, dimers, and monomers, during the depolymerization process …”

Section: Why Could Microplastics Potentially Spread Amr?mentioning

confidence: 99%

“…56,57 Different types of extracellular enzymes, such as laccase and alkane hydroxylase, involve and depolymerize the PE polymer into shorter chains, such as oligomers, dimers, and monomers, during the depolymerization process. 58 Besides microplastics, particles, including sands 59 and suspended solids, 60 can also load biofilm-structured compartments, and exposure to such particles would also possibly facilitate HGT frequency in the environment. For some reason, the presence of such particles can promote cell-contact opportunities and enhance the recipient and donor cell permeability.…”

Section: Why Could Microplastics Potentially Spread Amr?mentioning

confidence: 99%

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Determining the Contribution of Micro/Nanoplastics to Antimicrobial Resistance: Challenges and Perspectives

Luo

Liang

Cui

et al. 2023

Environ. Sci. Technol.

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Microorganisms colonizing the surfaces of microplastics form a plastisphere in the environment, which captures miscellaneous substances. The plastisphere, owning to its inherently complex nature, may serve as a "Petri dish" for the development and dissemination of antibiotic resistance genes (ARGs), adding a layer of complexity in tackling the global challenge of both microplastics and ARGs. Increasing studies have drawn insights into the extent to which the proliferation of ARGs occurred in the presence of micro/nanoplastics, thereby increasing antimicrobial resistance (AMR). However, a comprehensive review is still lacking in consideration of the current increasingly scattered research focus and results. This review focuses on the spread of ARGs mediated by microplastics, especially on the challenges and perspectives on determining the contribution of microplastics to AMR. The plastisphere accumulates biotic and abiotic materials on the persistent surfaces, which, in turn, offers a preferred environment for gene exchange within and across the boundary of the plastisphere. Microplastics breaking down to smaller sizes, such as nanoscale, can possibly promote the horizontal gene transfer of ARGs as environmental stressors by inducing the overgeneration of reactive oxygen species. Additionally, we also discussed methods, especially quantitatively comparing ARG profiles among different environmental samples in this emerging field and the challenges that multidimensional parameters are in great necessity to systematically determine the antimicrobial dissemination risk in the plastisphere. Finally, based on the biological sequencing data, we offered a framework to assess the AMR risks of micro/nanoplastics and biocolonizable microparticles that leverage multidimensional AMR-associated messages, including the ARGs' abundance, mobility, and potential acquisition by pathogens.

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Section: Why Could Microplastics Potentially Spread Amr?mentioning

confidence: 99%

Section: Why Could Microplastics Potentially Spread Amr?mentioning

confidence: 99%

Determining the Contribution of Micro/Nanoplastics to Antimicrobial Resistance: Challenges and Perspectives

Luo

Liang

Cui

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

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“…Microplastics are classified into primary and secondary microplastic. Primary microplastics are derived from the plastics whose size is less than 5 mm and secondary microplastics are derived from the breakdown or hydrolysis of large plastic particles through a physical or chemical process (Galgani et al., 2013; Thakur et al., 2023).…”

Section: Introductionmentioning

confidence: 99%

Identification and characterization of extracted microplastics from agricultural soil near industrial area: FTIR and X‐ray diffraction method

Thakur

Singh

et al. 2023

Environmental Quality Mgmt

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Microplastics have been found in large quantities in agricultural soil and now become a major global issue. Different types of microplastic have adverse effects on agricultural soil. The most widely used method for the extraction of microplastics in agricultural soil is the density floatation method by using saturated NaCl solution. This method includes the pre‐digestion of soil samples with H2O2 to remove all the organic matter present in the soil. Different types of microplastic particles were extracted and identified by using ATR‐FTIR viz polypropylene, polybutylene tetrapthalate, polyethylene, polystyrene, and polyethylene tetrapthalate. The crystalline nature of extracted microplastic was checked by employing XRD analytical technique. Floatation with higher density saturated sodium chloride (NaCl) solution recovered approximately 80% MPs from soil. Floatation methods were found to be effective for extracting microplastics from soils.

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“…One such emerging pollutant is microplastics and drawing global attention due to their ubiquitous and persistent nature in the entire ecosystem, making them a top environmental issue (Geyer et al, 2017;Jambeck et al, 2015;Lozano et al, 2021). Microplastics (MPs) are plastics of particle size less than 5 mm, widely distributed in aquatic and terrestrial environments (Fuller & Gautam, 2016;Jiang et al, 2020;Judy et al, 2019;Thakur et al, 2023). The toxicity of microplastics increases with the decrease in size as they could be easily ingested and transported through the food chain (Carlin et al, 2020;Chae & An, 2020;Qi et al, 2020;Zhu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Biochemical responses, growth and reproduction of earthworm in low density polyethylene (LDPE)

Angmo

Dutta

Singh

et al. 2023

Environmental Quality Mgmt

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There is an unprecedented production of plastic that is accelerating its disposal while affecting the fitness of the terrestrial as well as the aquatic environment. The term microplastics refers to plastic fragments that are less than 5 mm in size and are widely distributed in the environment. Therefore, the present study intends to explore the biological response of earthworms (Eisenia fetida) toward different concentrations of low‐density polyethylene. E. fetida treated with low‐density polyethylene concentration (Control), 250 mg kg−1, 1000 mg kg−1, 6000 mg kg−1, 12,000 mg kg−1, and 25,000 mg kg−1. The above ratios were thoroughly mixed with 1kg of artificial soil and tested for growth, reproduction (cocoons and hatchling count), and enzymatic activities namely superoxide dismutase, guaiacol peroxidase, glutathione‐S‐transferase, and glutathione reductase and molecular docking studies. No mortality was observed during the exposure period at any concentrations. On the 28th day, when compared to the control the highest decrease in body weight of earthworms was observed in 25,000 mg (28.4%) followed by 12,000 mg (12.2%) and 6000 mg (3.4%). The cocoon and hatchlings significantly declined as the dose of microplastics increases. Enzymatic activity such as SOD and POD showed declined trend as the dose increased, while GST and GR increased with an increase in microplastic concentrations on 28th day. Furthermore, molecular docking showed that LDPE can modulate the activity of all four enzymes significantly.

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Biodegradation of different types of microplastics: Molecular mechanism and degradation efficiency

Cited by 44 publications

References 111 publications

Determining the Contribution of Micro/Nanoplastics to Antimicrobial Resistance: Challenges and Perspectives

Determining the Contribution of Micro/Nanoplastics to Antimicrobial Resistance: Challenges and Perspectives

Identification and characterization of extracted microplastics from agricultural soil near industrial area: FTIR and X‐ray diffraction method

Biochemical responses, growth and reproduction of earthworm in low density polyethylene (LDPE)

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