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Microplastics as Emerging Contaminants: Unraveling Their Impact on Soil Health
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This review pulls together existing research showing how tiny plastic bits in soil mess with its structure, chemistry, and the microbes that keep it healthy, making it harder for plants to grow and absorb nutrients properly. This matters because these plastics can travel from soil into the crops we eat, and the damage to soil health could shrink crop yields over time, raising concerns about both food safety and food supply.
Microplastics (MPs), plastic particles smaller than 5 mm, are pervasive pollutants contaminating food, water, and air. Originating from industrial processes, agricultural practices, and plastic degradation, they infiltrate aquatic and terrestrial ecosystems, including soils. In soil, pose significant environmental risks by altering physical, chemical, and biological properties. Physically, they disrupt soil structure, reducing porosity, water retention, and aeration, which hinders root growth and water uptake. Chemically, MPs interact with soil constituents, serving as carriers for toxic substances like pesticides and heavy metals while releasing harmful additives that alter soil chemistry. Biologically, they affect microbial communities, decreasing diversity, enzyme activity, and nutrient cycling, ultimately diminishing soil fertility and productivity. These changes have severe ecological and agricultural consequences. MPs can migrate into plants and enter the food chain, potentially affecting human health. Altered soil properties may reduce crop yields, threatening food security. Their persistence exacerbates long-term environmental impacts, while sorbed toxic substances further endanger organisms. Addressing microplastic pollution is critical to safeguarding soil health, ecosystem balance, and sustainable agriculture. This review examines the sources, types, and behavior of MPs in soil, along with their impact on soil health and productivity, emphasizing the urgency of mitigating this growing threat.
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Microplastics in Soil: An Emerging Threat
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Researchers reviewed the emerging problem of microplastic pollution in soil, tracing contamination to agricultural practices, industrial activities, and atmospheric deposition, and examining downstream risks to ecosystem health and human well-being.
Microplastics in soil: a review on research status, sources, methods, and remediation strategies
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A comprehensive literature review found that soil microplastic research lags far behind aquatic studies despite annual MP discharge into farmland exceeding marine inputs, with synthetic textiles, tire wear, and urban dust as dominant sources entering soil via atmospheric deposition, sewage irrigation, and agricultural film use. The soil MP burden threatens food crop health, risks leaching into groundwater, and poses intergenerational health risks through nutrient disruption and potential plant-to-human transmission pathways.
Impact of Microplastic Pollution on Soil Health
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Researchers review how microplastics enter agricultural soils from plastic mulch films, sewage sludge, and irrigation water, documenting their effects on soil microbial communities, nutrient cycling, and overall soil health in ways that may threaten long-term agricultural productivity.
Microplastics in Soil: Unveiling the Threat Within the Earth’s Crucial Ecosystem
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Researchers surveyed the sources, ecological impacts, and remediation strategies for microplastic contamination in soil, revealing that agricultural practices, plastic mulch, sewage sludge application, and atmospheric deposition are primary pathways loading microplastics into terrestrial ecosystems. Soil microplastics threaten plant health, soil microbiome function, and food security while serving as a vector carrying toxic additives and pathogens up the food chain to humans.
Microplastics in Soil Ecosystem: Insight on Its Fate and Impacts on Soil Quality
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Researchers examined how plastic film used widely in Chinese agriculture breaks down and accumulates in soil, finding that microplastic debris may degrade soil quality and crop health over time, with potential ripple effects for food safety and agricultural sustainability.
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