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Microplastics Build-Up in Soils- Spatial Distribution Patterns across different Land uses and Associated Health Risks
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Researchers surveyed microplastic contamination across multiple land-use types and found that greenhouse soils and residential areas had the highest concentrations, reaching up to 4,500 particles per kilogram. The study estimated that infants could face roughly 20 times higher daily microplastic intake than adults in heavily contaminated areas. The findings highlight the widespread variability of soil microplastic pollution and its potential health implications, particularly for vulnerable populations.
Abstract Microplastics (MPs) pollution in soil is a growing concern due to extensive plastic use and its persistence in soil, which degrade soil health, and can enter human body through ingestion, however its extent and effects in soil are largely unknown. This study aimed to assess the extent, composition, distribution patterns and potential hazards of MPs in major land use and soils to build knowledge of MPs as emerging containment when designing policy for environmental sustainability. MPs levels ranged from 120 to 4500 MPs/kg, while highest in greenhouse soil (3350 MPs/kg), followed by residential areas (2341 MPs/kg), and lowest in fish farm soil (128 MPs/kg). The geo-accumulation index in residential and greenhouse soils was extremely contaminated (Igeo ~ 4.7). Estimated Daily Intake shows infants have ~ 20 times higher exposure than adults in highly contaminated sites. Polymer types varied by land use types as HDPE dominated roadside (30%) and greenhouse soils (26%), while polyethylene (PE) in sewage-irrigated and PVC peaked in landfill (26%). White, fiber-shaped MPs sized 1–5 mm was most common. This study confirmed the abundance and spatial variability of MPs across various land uses indicating the potential risks of MPs pollution, especially the residential and agricultural soils which act both source and sink of MPs pollution. It also highlights the need for further comprehensive research on implications of MPs contamination on soil ecology under different land use, environmental conditions, and agricultural practices.
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Distribution of microplastics in the soils of a petrochemical industrial region in China: Ecological and Human Health Risks
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Researchers surveyed microplastic contamination in soils across a major petrochemical industrial region in China and found concentrations ranging from 714 to over 11,000 particles per kilogram. Educational land had the highest contamination levels, and ecological risk assessments showed nearly all land-use types were at the highest risk level. The study also found that infants face significantly higher daily microplastic exposure than adults, underscoring the need for targeted pollution management in industrial urban areas.
Risks of microplastics in different land-use types of soil in a typical petrochemical city in China
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Researchers surveyed microplastic contamination across different land-use types in Daqing, a major petroleum city in China, finding concentrations ranging from about 714 to over 11,000 particles per kilogram of soil. Industrial land posed the highest ecological risk, and infants were found to have significantly higher daily microplastic exposure than adults. The dominant plastics were rayon, polypropylene, and polyethylene, primarily in fiber form smaller than 1 mm.
Terrestrial Microplastic Pollution: Occurrence, Fate, and Ecological Effects on Soil Systems
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Researchers synthesized evidence on microplastic occurrence across land uses — croplands, urban areas, industrial zones, and remote environments — finding consistently higher concentrations near intensive human activity, vertical enrichment in topsoils, and widespread ecological effects on soil structure, microbial communities, and plant and invertebrate health.
Significant influence of land use types and anthropogenic activities on the distribution of microplastics in soil: A case from a typical mining-agricultural city
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Scientists surveyed microplastic pollution across five types of land in a Chinese mining-agricultural city and found the highest levels in greenhouse farmland, with nearly 3,738 particles per kilogram of soil. Agricultural plastic waste, irrigation water, and fertilizers were identified as the main sources of contamination. The study shows that farming practices are major contributors to microplastic buildup in the soil that produces our food.
Characterization of Microplastics and Associated Heavy Metals in Urban Soils Affected by Anthropogenic Littering: Distribution, Spatial Variation, and Influence of Soil Properties
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Researchers sampled soils across residential, commercial, and industrial land-use types in urban areas and found microplastics in every location, with polypropylene, polyethylene, and polyamide as the dominant polymer types, at concentrations up to 850,000 particles per kilogram. Heavy metals were also associated with the plastic particles, meaning microplastics in urban soil may serve as combined carriers of chemical toxicants. The findings highlight urban soil as a major but underappreciated reservoir of microplastic pollution.
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