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A Review on Plastics Degredation by Using Microbes
Summary
This review pulls together existing research on how certain bacteria can break down plastic waste, including common types like plastic bags and packaging foam, by producing special enzymes that eat away at the material. This matters because plastic pollution doesn't just harm the environment—it breaks down into microplastics that end up in our water, food, and even our bodies, so finding natural ways to break down plastic faster could reduce the amount of it we're all exposed to over time. It's important to note this is a summary of lab-based findings, not a ready-to-use solution, so real-world cleanup applications are still being developed.
Plastic pollution has emerged as one of the most persistent global environmental challenges due to the widespread use, durability, and accumulation of synthetic polymers. Traditional disposal methods such as landfilling and incineration are inefficient and lead to significant ecological and health concerns. Recent advances in microbial degradation and enzymatic bioremediation have revealed promising ecofriendly strategies for mitigating plastic waste. This review explores the mechanisms, efficiency, and applications of Microbes-mediated degradation of major plastic polymers including polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), and polylactic acid (PLA). Key microbial species ; such as Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, and Streptococcus spp. demonstrate selective degradation abilities enhanced by biofilm formation, extracellular enzymes, and oxidative pathways. Factors influencing degradation, including pH, temperature, microbial density, and polymer crystallinity ,are discussed in detail. The potential of blending polymers with bioplastics, genetic engineering of microorganisms, and optimized culture conditions highlight the emerging potential of microbial bioremediation as a sustainable alternative to conventional waste management. This review provides a comprehensive overview of microbial strategies that could significantly contribute to long-term solutions for plastic waste reduction and environmental restoration.