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

Jayan, Neethu; Skariyachan, Sinosh; Sebastian, Denoj

doi:10.1016/j.jhazmat.2023.131623

Cited by 25 publications

(3 citation statements)

References 84 publications

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“…In this study, the CO 2 evolution study also known as the strum test was conducted to prove the mineralization of the tested MPs particles. NJD1 for the same type of MPs particles after 120 days (Jayan et al, 2023;Rose et al, 2020). The production of CO 2 in this study is an evidence of the complete degradation of PE, PP, and PS which was also highlighted in their weight loss, and the assimilation by the SHBF2 strain.…”

Section: Co2 Evolutionsupporting

confidence: 61%

“…The alkaline condition created by the neutrophilic SHBF2 was due to the usage of organic C from the PE, PP, and PS particles that produce basic alkaline protease from the long-chained sugar of MPs particles and resulted in the gradual pH increase of the MSM media (Samanta et al, 2020). Unlike most of the studies, a highly acidic state (7.25 to 4.6) over 120 days of incubation of B. cereus NJD1 has also been seen while using LDPE as a sole C source (Jayan et al, 2023). The reason behind the acidic condition is not clear from that study.…”

Section: Changes In Phmentioning

confidence: 87%

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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

Hossain,

Shukri,

Waiho

et al. 2024

Environ Sci Pollut Res

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The ubiquitous proximity of the commonly used microplastic (MP) particles particularly polyethylene (PE), polypropylene (PP), and polystyrene (PS) poses a serious threat to the environment, and human health globally.Biological treatment as an environment-friendly approach to counter MPs pollution has recent interest when the bioagent has beneficial functions in their ecosystem. This study aimed to utilize beneficial floc-forming bacteria B. cereus SHBF2 isolated from an aquaculture farm in reducing the MPs particles (PE, PP, and PS) from their environment. The bacteria were inoculated for 60 days in a media containing MPs particles as a sole carbon source. On different days of incubation (DOI), the bacterial growth analysis was monitored and the MPs particles were harvested to examine their weight loss, surface changes, and alterations in chemical properties. After 60 DOI, the highest weight loss was recorded for PE, 6.87 ± 0.92%, which was further evaluated to daily reduction rate (k), 0.00118 gday -1 , and half-life (t 1/2 ), 605.08 ± 138.52 days. The OD value (1.74 ± 0.008 Abs.) indicated the higher efficiency of bacteria for PP utilization, and so for the colony formation per define volume (1.04 × 10 11 CFU/mL). Biofilm formation, erosions, cracks, and fragments were evident during the observation of the tested MPs using the scanning electron microscope (SEM). The formation of carbonyl and alcohol group due to the oxidation and hydrolysis by SHBF2 strain were confirmed using the Fourier transform infrared spectroscopic (FTIR) analysis. Additionally, the alterations of pH and CO 2 evolution from each of the MPs type ensures the bacterial activity and mineralization of the MPs particles. The findings of this study have confirmed and indicated a higher degree of biodegradation for all of the selected MPs particles. B. cereus SHBF2, the floc-forming bacteria used in aquaculture, has demonstrated a great potential for use as an efficient MPs degrading bacterium in the biofloc farming system in the near future to guarantee a sustainable green aquaculture production.

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Section: Co2 Evolutionsupporting

confidence: 61%

Section: Changes In Phmentioning

confidence: 87%

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

Hossain,

Shukri,

Waiho

et al. 2024

Environ Sci Pollut Res

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“…Current research on polyethylene decomposition is mainly toward low-density polyethylene. Many polyethylene-degrading microorganisms have been reported (Gao et al 2022;Jayan et al 2023;Kumar Sen and Raut 2015). Some show capability in metabolizing linear alkanes with a membranous enzyme alkane hydroxylase, a member of the alkB family (EC 1.14.15.3) that plays a key role in the aerobic degradation of alkanes and β-oxidation of fatty acids in bacteria.…”

Section: Other Polymersmentioning

confidence: 99%

Natural and engineered enzymes for polyester degradation: a review

Guo,

Li,

Yang

et al. 2024

Environ Chem Lett

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Plastic pollution is becoming a major health issue due to the recent discovery of microplastics and nanoplastics in living organisms and the environment, calling for advanced technologies to remove plastic waste. Here we review enzymes that degrade plastics with focus on plastic properties, protein engineering and polymers such as poly(ethylene terephthalate), poly(butylene adipate-co-terephthalate), poly(lactic acid), polyamide and polyurethane. The mechanism of action of natural and engineered enzymes has been probed by experimental and computation approaches. The performance of polyester-degrading enzymes has been improved via directed evolution, structure-guided rational design and machine learning-aided strategies. The improved enzymes display higher stability at elevated temperatures, and tailored substrate-binding sites.

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Natural Products Produced by the Species of Bacillus cereus Group: Recent Updates

Azizoglu,

Argentel‐Martínez,

Peñuelas‐Rubio

et al. 2024

Journal of Basic Microbiology

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Bacillus cereus group produces diverse antimicrobial compounds through different metabolic pathways, including amino acid‐based compounds, sugar derivatives, volatile and miscellaneous compounds. These antimicrobial compounds exhibit antibacterial and antifungal activities against various plant pathogens, promoting plant growth and enhancing tolerance to abiotic stresses. They also exhibit nematicidal activities against plant nematodes and antagonistic effects against pathogens in aquatic animals, promoting growth and inducing immune responses. Moreover, B. cereus group bacteria play a significant role in bioremediation by breaking down or neutralizing environmental pollutants, such as plastics, petroleum products, heavy metals, and insecticides. They produce enzymes like laccases, lipases, proteases, and various oxidases, contributing to the degradation of these pollutants. In the food industry, they can cause food poisoning due to their production of enterotoxins. However, they are also utilized in various industrial applications, such as producing environmentally friendly bio‐based materials, biofertilizers, and nanoparticles. Notably, B. cereus transforms selenite into selenium nanoparticles, which have health benefits, including cancer prevention. In summary, B. cereus group bacteria have diverse applications in agriculture, bioremediation, industry, and medicine, contributing to sustainable and eco‐friendly solutions across multiple fields. In this review, we have revised B. cereus group and the characteristics of every species; we have also highlighted the more important compounds secreted by the species of B. cereus group and the applications of these compounds. The aim is to explain the available secondary metabolites to classify the species from this group, increasing the knowledge about taxonomy of this group.

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

Cited by 25 publications

References 84 publications

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

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

Natural and engineered enzymes for polyester degradation: a review

Natural Products Produced by the Species of Bacillus cereus Group: Recent Updates

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