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Polyethylene Terepthalate (PET) biodegradation and characterisation of landfill leachate bacteria
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This Icelandic undergraduate thesis reviews PET plastic biodegradation mechanisms and characterizes bacteria isolated from landfill leachate for their ability to degrade PET. The work explores biological pathways for breaking down one of the most widely used plastics, which otherwise accumulates as persistent microplastic pollution.
Í þessu verki er fjallað um framleiðslu og byggingu plastfjölliða og áhrif þeirra á umhverfið eftir notkun. Lífniðurbrot á plasti kynnt og helstu bakteríum og ensímum lýst með áherslu á pólýetýlen terephthalate (PET). Horft á framtíðarmöguleika á þessu sviði. Einnig eru eiginleikar baktería sem einangraðar hafa verið úr affalsvatni sorpurðunarstöðvar skoðaðar með tilliti til niðurbrots á plastefnum. Í ljósi þess að töluvert magn af PET hefur verið fargað á urðunarstaðnum á notkunarárum þess, má alykta að aðgengi baktería að PET í nærumhverfinu hafi leitt til genatjáningar fyrir niðurbroti þess. Bakteríur voru prófaðar fyrir þekjumyndun á yfirborði plasts, framleiðslu yfirborðsvirkra efna og ensímvirkni. Bakteríur voru einnig prófaðar fyrir tilvist tveggja þekktra PETasa(p-Nitrobenzylesterasi og Carboxylesterasi) með PCR tækni. Rannsóknarspurning: Eru bakteríur sem framleiða PETasa meðal þeirra sem einangruð hafa verið frá Sigurðargilslæk?
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Polyethylene terephthalate (PET) is one of the most common plastics, found in bottles and packaging, and it breaks down into persistent microplastics in the environment. This study screened bacteria collected from PET surfaces at a landfill in Malaysia, finding strains with promising esterase activity capable of forming biofilms on PET and beginning to degrade it. The findings point toward biological solutions for breaking down PET microplastics before they spread further into ecosystems.
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This systematic review examines how microorganisms like bacteria and fungi can break down PET plastic, one of the most common types of plastic waste. The research identifies several promising biological approaches that could help reduce plastic pollution without the harmful side effects of chemical recycling methods. Finding better ways to break down plastic waste is critical for reducing the microplastics that end up in our water, food, and bodies.
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Researchers isolated Bacillus subtilis from PET plastic waste dump sites and demonstrated that the bacterium can degrade polyethylene terephthalate microplastics over six months, with UV-pretreated PET showing the most pronounced changes including new alkyl aryl ether and alkene groups detected by FTIR and GC-MS. The findings suggest soil bacteria could offer a biodegradable solution for eliminating PET from plastic-contaminated sites.
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Researchers performed a multi-omic analysis of bacterial communities colonizing PET plastic in marine environments, identifying microorganisms capable of degrading PET and characterizing the enzymatic pathways involved, advancing understanding of natural plastic biodegradation in ocean systems.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.