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Biodegradation of Plastic Wastes in Soil: A Review on Testing and Evaluation Procedures
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This review critically examines the methods used to evaluate plastic biodegradation in soil environments, comparing standardized laboratory tests with field-based approaches. The authors identify significant inconsistencies across testing protocols that make it difficult to compare results or validate biodegradability claims for commercial plastics. Standardizing methodology is identified as a key priority for accurately assessing the environmental fate of biodegradable plastics.
The recalcitrant behaviour of plastic creates an acute pollution on soil and aquatic biota. The plastic polymer synthesised from petroleum takes several hundred years to degrade. During excavation activities on the lands within or at the outskirts of urban limits, single use plastic wrappers and bags that were buried long ago, can be found in large quantities. Researchers have already identified the potentiality of microorganisms to biodegrade the plastic polymers. These microorganisms utilise plastic as a sole source of carbon and mineralise them into carbon dioxide under optimum environmental conditions. This paper provides a brief review on the biodegradation studies carried out by various researchers, spectra of microorganisms identified with the potential to degrade various polymeric substances, methods of testing and evaluations in order to quantify the effectiveness of degradation, their shortfalls and risks involved in implementing bioremediation technique in the field. A review on other related aspects that are deemed to be relevant to this topic are also discussed.
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Researchers isolated soil microorganisms and tested their ability to biodegrade polyethylene and PVC plastics in vitro over one month, identifying both gram-positive and gram-negative bacterial species with degradation capability. The study highlights microbial biodegradation as a low-cost, eco-friendly strategy to reduce plastic waste accumulation in the environment.
The Potential of Plastic Degradation as Soil Remediator for Plants: a Review
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This study characterized microplastic contamination in commercial sea salt from major global producing nations, detecting particles across all geographic origins. Polymer types and concentrations varied by production method and source water quality, with traditionally harvested solar salts generally showing lower contamination than mechanically processed sea salt products.
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This review examines the use of microorganisms for biodegradation of synthetic plastics, highlighting how the durability and chemical inertness of plastics has led to dangerous accumulation in terrestrial and marine ecosystems. The authors discuss bioplastic alternatives and argue that microbial biodegradation represents a promising, non-invasive strategy for reducing plastic contamination across ecosystems.
The biochemical mechanisms of plastic biodegradation
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This review comprehensively maps the biochemical pathways by which microorganisms break down synthetic plastics, ranking the most effective biodegrading organisms for each major plastic type and cataloging experimental techniques used in the field to guide future biodegradation research.
Research Progress in Microbial Degradation of Plastics
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This review summarizes microbial degradation research across six major plastic types, examining biodegradation mechanisms, key microbial species, and enzyme pathways involved in breaking down synthetic polymers. The authors argue that microbial degradation represents an emerging, environmentally superior alternative to traditional incineration and landfill approaches for managing plastic waste.
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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.