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Enhanced microbial strategies to mitigate microplastic transfer via composting to agricultural ecosystems—A short review
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Microplastics in MSW-derived compost: release rate, characteristics, ecological risks, and mitigation strategies for sustainable agriculture
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Compost made from household trash often contains tiny plastic bits called microplastics, and surprisingly, the compost from industrial facilities had even more plastic contamination than the raw waste it started from. Since this compost gets spread on farm fields, these plastic fragments can build up in the soil where our food grows. The good news: simply sorting out plastic from food/organic waste before composting (rather than mixing everything together) dramatically cuts down on this contamination, suggesting better recycling habits at home and in waste facilities could help keep microplastics out of our agricultural system.
Microplastics in Composts, Digestates and Food Wastes: A Review
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Researchers reviewed microplastic contamination in composts, digestates, and food wastes, finding that plastic packaging mixed into food waste streams may inadvertently introduce microplastics into agricultural soils during composting or anaerobic digestion. The authors highlight critical research gaps and call for harmonized methods to better assess this potential pathway of soil microplastic contamination.
Microbiomes Against Microplastic Pollution in Agriculture: Biodegradation, Remediation, and Soil Health Implications
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Researchers reviewed how soil microbiomes interact with microplastics in agricultural settings, finding that microbial communities offer biodegradation and remediation potential, though intensive plastic use in farming combined with fertilizer and wastewater inputs continuously introduces microplastics into soils with implications for soil health.
Influence of Polyethylene Terephthalate and Polystyrene Microplastics on Microbial Dynamics in Rice Straw Composting
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Researchers found that PET and polystyrene microplastics added to rice straw composting at 0.5% dry weight reduced microbial diversity by 12%, lowered nitrate levels by up to 33%, cut germination indices by roughly 50%, and slowed organic matter humification, while the plastics themselves remained chemically intact after 90 days.
Microplastic Pollution in Compost Derived from Mixed Municipal Waste in Kermanshah City: Abundance, Characteristics, and Ecological Risk Evaluation
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Researchers found that compost made from mixed municipal solid waste in Kermanshah, Iran, was universally contaminated with microplastics at an average of 2,160 particles per kilogram — translating to an estimated 118 million microplastics added to each hectare of farmland annually — posing medium to high ecological risk and highlighting compost as a significant pathway for microplastic entry into agricultural soils.
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