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Phenotypic and Genomic Characterization of Polyethylene-Degrading Bacillus cereus PE-1 Enriched from Landfill Microbial Consortium
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Scientists found a bacteria called Bacillus cereus PE-1 in landfill soil that can actually eat and break down plastic bags and containers (polyethylene). The bacteria damaged the plastic's surface and reduced its weight by about 5% in just 30 days, suggesting it could potentially help clean up plastic pollution in the environment. While this research is still early and needs more testing, it offers hope for using natural bacteria to tackle the growing problem of plastic waste that threatens our ecosystems and food chain.
Polyethylene (PE) is one of the most persistent pollutants in the environment. Here, we enriched a microbial consortium (PEH) and isolated a bacterial strain, Bacillus cereus PE-1, capable of degrading PE from landfill soil using PE as the sole carbon source. Scanning electron microscopy revealed significant surface erosion, while weight loss reached up to 4.57% after 30 days. TGA showed a 5.88% decrease in onset degradation temperature, and contact angle measurements indicated increased hydrophilicity. Elemental analysis confirmed oxygen incorporation into the polymer matrix. Genome sequencing revealed genes associated with biofilm formation (epsA, epsB, pgaC), oxidation (laccase, copper oxidase), hydrolysis (esterase, lipase, PHB depolymerase), and β-oxidation pathways. While these genomic findings indicate a predicted capacity for assimilation, no transcriptomic or proteomic validation was performed in this study. These findings suggest that PE-1 can colonize PE, initiate oxidative cleavage, and potentially assimilate breakdown products. This study provides new insights into the microbial degradation of polyolefins and identifies a promising bacterial candidate for plastic bioremediation.
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Isolation and Evaluation of Plastic Degrading Bacterial Species from Municipal Waste Dumping Site
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Scientists found bacteria living in a municipal trash dump—including a type called Bacillus—that can break down plastic, eating away nearly half the weight of a plastic sample in just one month. This matters because plastic waste (and the microplastics it breaks into) is piling up in our environment, water, and even our bodies, so finding natural ways to break it down faster could help reduce our long-term exposure to it.
Genomic insights and metabolic pathways of an enriched bacterial community capable of degrading polyethylene
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Researchers enriched bacteria from wastewater treatment sludge that can break down polyethylene plastic, achieving a 3% weight reduction in plastic films over 28 days. Genomic analysis identified specific bacterial strains and 14 plastic-degrading genes, including those for enzymes like laccase and lipase that attack the plastic's molecular structure. The study offers a potential pathway toward using naturally occurring bacteria as a sustainable solution for plastic waste degradation.
Marine bacteria capable of enzymatic degrading of low- and high-density polyethylene: Toward sustainable mitigation of marine microplastic pollution
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Scientists discovered ocean bacteria that can break down common plastic types found in marine pollution, with some bacteria destroying up to 17% of the plastic in lab tests. These naturally occurring bacteria could potentially be used to help clean up the tiny plastic particles that contaminate our oceans and eventually enter our food chain through seafood. While still in early research stages, this finding offers hope for a biological solution to reduce the microplastics that may pose health risks when we consume contaminated fish and shellfish.
Evaluation and optimization of polyethene plastic degradation potential of bacteria isolated from plastic contaminated soil
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Researchers isolated five types of bacteria from plastic-polluted soil in Lahore and tested their ability to break down polyethylene plastic strips in the lab. The bacteria reduced the plastic's weight by 11 to 32 percent, with Bacillus cereus showing the largest reduction, and chemical analysis identified breakdown byproducts and a possible degradation pathway.
Isolation, Screening and Characterization of Plastic-Degrading Bacteria From Soil for PWM
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Scientists isolated bacteria from soil near garbage sites and identified strains capable of degrading plastic materials, with scanning electron microscopy revealing physical damage — holes and cracks — to plastic surfaces after bacterial exposure within 30 days. The study contributes to the search for soil microbes that could be harnessed for biological plastic waste management. Biodegradation by indigenous soil bacteria could offer a more environmentally friendly alternative to landfilling or incineration of plastic waste.
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