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61,005 resultsShowing papers similar to Assessing microplastics contamination and characteristics in organic soil amendments in the Greater Accra Metropolitan Area of Ghana
ClearUnveiling the abundance and potential impacts of microplastic contamination in commercial organic fertilizers/compost produced from different solid waste
Researchers analyzed commercial organic fertilizers made from different waste sources and found microplastics in 80% of the samples, with compost from mixed municipal waste containing the highest levels. The estimated amounts of microplastics being introduced into agricultural soils through these fertilizers exceeded previous reports. The study highlights the need for stricter regulations on organic fertilizer quality to prevent microplastic contamination of farmland.
Quantification and identification of microplastics in organic fertilizers: the implication for the manufacture and safe application
Researchers measured microplastic contamination in 23 commercial organic fertilizers, finding widespread presence at levels that could meaningfully contribute to agricultural soil pollution when fertilizers are applied. The results raise concerns about organic fertilizers as an underappreciated pathway for microplastics entering farm soils and the food system.
The potential contribution of microplastic pollution by organic fertilizers in agricultural soils of Bangladesh: quantification, characterization, and risk appraisals
Researchers found an average of 1,530 microplastic particles per kilogram of commercial organic fertilizer in Bangladesh, estimating that annual fertilizer application could introduce up to 1,387 metric tons of microplastics to agricultural soils nationwide.
Microplastic contamination of organic fertilisers applied to agricultural soils
This study examined microplastic contamination in organic fertilizers applied to agricultural soils, finding plastic particles in multiple fertilizer types. Organic fertilizers derived from sewage sludge or compost can introduce microplastics into farmland, potentially contaminating crops and groundwater.
Organic amendments as vectors of micro and macro plastic pollution of terrestrial ecosystems
Researchers analyzed seven types of organic amendments commonly applied to farmland, including sewage sludge, manure, composts, and digestates, for microplastic contamination. They found microplastics in all samples, with sewage sludge containing the highest levels and a wide variety of polymer types. The study demonstrates that organic soil amendments are an important and underappreciated pathway through which both micro and macro plastics enter agricultural soils.
Unraveling the characteristics of microplastics in agricultural soils upon long-term organic fertilizer application: A comprehensive study using diversity indices
Researchers analyzed microplastic contamination in agricultural soils that had received organic fertilizers (pig manure, chicken manure, and sewage sludge compost) for 12 years. All three fertilizer types introduced significant microplastic pollution, with risk levels classified as high across all treatments. This study shows that organic fertilizers, often considered environmentally friendly, are a major pathway for microplastics to enter the soil and potentially the food we grow in it.
Occurrence and distribution of microplastics in organic fertilizers in China
Researchers surveyed microplastic contamination in organic fertilizers across China, finding widespread plastic particles in compost, manure, and biosolids, identifying fertilizer application as an emerging pathway for microplastic accumulation in agricultural soils.
Plastics and other extraneous matter in municipal solid waste compost: A systematic review of sources, occurrence, implications, and fate in amended soils
Researchers reviewed contamination in municipal compost made from household organic waste, finding plastics are the most prevalent pollutant — with some batches containing enough plastic to deposit over 500 kg per hectare of farmland each year. Repeated use of contaminated compost builds up microplastics in soil, threatening soil health and potentially moving plastic particles into crops and food.
Organic fertilizers as a vector of microplastics: A comprehensive review of sources, dispersion, and environmental consequences
This review synthesized evidence on how organic fertilizers — including sewage sludge and composts — act as vectors for microplastic transport into agricultural soils. The authors document how MPs from degraded plastics, textiles, and personal care products enter farming systems and affect soil health, plant growth, and the broader food chain.
Organic fertilizer as a vehicle for the entry of microplastic into the environment
Researchers analyzed organic fertilizers produced from biowaste composting and fermentation and found microplastic particles in all samples tested. The contamination likely enters the fertilizer through improperly sorted household waste that includes plastic packaging and other synthetic materials. The study identifies organic fertilizer application as a previously overlooked pathway for introducing microplastics into agricultural soils, which could have implications for soil health and food safety.
Quantification and Characterisation of Microplastics in Organic Waste-Derived Soil Amendments
Researchers quantified microplastics in Scottish compost, anaerobic digestate, and biosolids used as soil amendments, finding contamination in all samples at concentrations of 34 to 160 particles per gram. Biosolids contained the highest levels, dominated by high-density fibers likely from textile washing, along with over 20,000 cellulosic microfibers per gram. The findings suggest that applying these organic amendments to agricultural land could introduce substantial quantities of microplastics into soil.
Microplastics identification and quantification in the composted Organic Fraction of Municipal Solid Waste
Researchers quantified microplastics in composted organic municipal solid waste from five facilities, finding contamination levels that raise concerns about compost quality and the potential transfer of microplastics to agricultural soils through organic waste recycling.
An Overlooked Entry Pathway of Microplastics into Agricultural Soils from Application of Sludge-Based Fertilizers
Researchers analyzed sludge-based fertilizers applied to agricultural soils and found high microplastic concentrations (hundreds to thousands per kilogram of dry weight) that were transferred to soils after application, identifying this as an important but overlooked pathway for terrestrial microplastic contamination.
Microplastics in agricultural soils: Evidence from an industrial suburb of Bangladesh
Researchers sampled agricultural soils from the surface and subsurface layers at an industrial suburb of Bangladesh, finding microplastic abundances of 1,309 items/kg in surface soils with significant correlations to soil pH, electrical conductivity, and organic matter content.
From organic fertilizer to the soils: What happens to the microplastics? A critical review
This review traces how microplastics enter agricultural soil through organic fertilizers made from municipal waste, sewage sludge, and animal manure. During the composting process, the microplastics undergo physical and chemical changes that can make them better at absorbing other pollutants from the soil. The review highlights that applying organic fertilizer to farmland is a major but often overlooked pathway for microplastics to contaminate the food supply.
A systematic review of the occurrence of microplastics in compost: Understanding the abundance, sources, characteristics and ecological risk
Researchers reviewed 19 global studies and found microplastics in virtually all types of compost — including those made from animal manure, sewage sludge, and municipal waste — with concentrations reaching up to 288,000 particles per kilogram in some samples. Since compost is widely applied to farmland, these findings highlight a significant but overlooked pathway for microplastics to enter soils and the food chain.
Microplastic in Australian processed organics: Abundance, characteristics and potential transport to soil ecosystem
Researchers analyzed processed organic waste products from 11 facilities across Australia and found microplastics in every sample, with concentrations ranging from 1,500 to 16,000 particles per kilogram. They estimated that billions to trillions of microplastic particles could be transferred to Australian soils annually through the application of compost and biosolids. The findings highlight that recycling organic waste, while beneficial for waste reduction, may inadvertently spread microplastic contamination to agricultural land.
Organic matter and microplastics nexus: A comprehensive understanding of the synergistic impact on soil health
This review examines how microplastics and organic matter interact in soil, finding that common soil additions like compost and sewage sludge are significant sources of microplastic contamination. The interplay between these substances can disrupt nutrient cycling, soil biology, and carbon storage, which ultimately affects the quality of food grown in contaminated soil.
Microplastic pollution and the related ecological risks of organic composts from different raw materials
Researchers analyzed microplastic contamination in 124 organic compost samples made from livestock manure, poultry waste, crop straw, and solid waste, finding that all types contained significant microplastic loads. Solid waste compost had the highest levels while crop straw compost had the lowest, and the particles showed signs of weathering and mineral attachment. The findings suggest that applying organic compost to farmland may be an underappreciated source of microplastic pollution entering agricultural soils.
Identification and Quantification of Microplastics in Compost: A case of landfills in Uganda
Researchers surveyed compost sites across 8 cities and 5 municipalities in Uganda, finding microplastics at all locations with fibers being the most abundant type (54.98%), indicating that poor waste management practices are driving plastic contamination into compost used in agriculture.
Amount, distribution and composition of large microplastics in typical agricultural soils in Northern Germany
Researchers surveyed agricultural soils in Northern Germany for large microplastics and found contamination across all sampled fields, with polyethylene and polypropylene being the most common polymer types. Concentrations varied widely depending on farming practices, with fields receiving compost and sewage sludge showing higher contamination levels. The study provides important baseline data on microplastic pollution in European agricultural soils and identifies fertilization practices as a key contamination pathway.
Do contaminants compromise the use of recycled nutrients in organic agriculture? A review and synthesis of current knowledge on contaminant concentrations, fate in the environment and risk assessment
This review examines whether recycled nutrients from waste streams, such as sewage sludge and compost, introduce harmful contaminants including microplastics into organic farmland. While levels of heavy metals and many pollutants have decreased in European waste streams, microplastic contamination in agricultural soil remains widespread and poorly understood. The review highlights that spreading waste-derived fertilizers on farmland is a significant pathway for microplastics to enter the food production system.
Microplastic contamination in agricultural soils from mulch films and organic amendments: Transformation mechanism, soil-Biota toxicity, and future perspectives
This review examines how agricultural soils are becoming increasingly contaminated with microplastics from plastic mulch films and organic amendments like compost, with land-based contamination being 4 to 23 times higher than in water. Microplastics in farmland can harm soil organisms, disrupt soil structure, and enter the food chain through crops, posing potential risks to human health.
Hidden contaminants: Unveiling the content of microplastics in municipal sewage sludge that may affect soil ecosystems
Researchers analyzed sewage sludge from two municipal treatment plants and found up to 116,000 microplastic particles per kilogram of dry sludge, with fiber-shaped and film-shaped particles dominating each plant respectively — highlighting the risk of spreading microplastic contamination to farmland when sludge is used as fertilizer.