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Microbe‐mediated biodegradation of microplastics from wastes
Summary
Researchers examined microbe-mediated biodegradation of microplastics from waste, reviewing bacterial and fungal species capable of breaking down various plastic polymers and discussing enzymatic mechanisms that could be harnessed for bioremediation strategies.
Abstract Microplastics (MPs) with slow degradation rates carry toxins and pathogens from surroundings, accumulate and pollute the environment. They bio‐accumulate on humans and other lifeforms leading to health concerns, including inflammatory lesions, oxidative stress and increased cancer risk, thus requiring immediate remediation actions. This review summarizes, categorizes and analyses recent findings on MP source, transit and environmental toxicity and explores their microbe‐mediated breakdown. Various micro‐organisms such as fungi, bacteria, algae and protists interact with and build biofilm on MP surfaces and alter their surface morphology for their degradation. Pure strains and microbial consortia have been successfully able to degrade MPs. Extracellular enzymes are produced by these micro‐organisms that convert the complex recalcitrant polymeric structure of MP to simpler forms. Further, knowledge of factors associated with MP degradation along with the development of genetic tools enhances the rate of microbial degradation with consortium having an advantage over single bacterium‐mediated MP transformation, which has been discussed.
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