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Papers
61,005 resultsShowing papers similar to A novel method for extraction of polypropylene microplastics in swine manure
ClearMethodological Approach for Detecting Polypropylene Microplastics in Agricultural Soil in Southern Portugal
A methodological approach was developed specifically for detecting polypropylene microplastics, one of the most common plastics in the environment. Improved polypropylene-specific detection methods help fill a gap in monitoring programs, since this polymer can be challenging to identify with general-purpose techniques.
Microplastic contamination in farmyard manures: implications for sustainable agriculture
Researchers investigated microplastic abundance and characteristics in non-commercial farmyard manures - a largely understudied pathway for microplastic entry into agricultural soils. The study assessed how manure application may serve as a source of microplastic contamination in farmland, contributing to understanding of plastic pollution cycles in terrestrial agricultural ecosystems.
Microplastics in manure: Sources, analytical methods, toxicodynamic, and toxicokinetic endpoints in livestock and poultry
Researchers reviewed the occurrence of microplastics in livestock and poultry manure, finding hundreds to thousands of particles per kilogram depending on the animal, with plastic-contaminated feed and mulching films as the primary sources. Because manure is widely spread on farmland as fertilizer, it represents a significant — and underappreciated — pathway for microplastics to enter agricultural soils and ultimately the food chain.
Occurrence of microplastic in livestock and poultry manure in South China
A study of 19 livestock and poultry farms in South China found microplastics in all manure and feed samples, dominated by PP and PE fragments and fibers, raising concerns about agricultural soil contamination when this manure is used as fertilizer.
Extraction of Polyethylene and Polypropylene Microplastic from Agriculture Soil
Researchers examined methods for extracting polyethylene and polypropylene microplastics from agricultural soil, investigating how microplastic concentrations affect soil properties and crop productivity while evaluating density separation and other extraction protocols to improve detection and quantification of plastic pollution in agroecosystems.
Identification of microplastics extracted from field soils amended with municipal biosolids
Researchers developed a method for extracting and identifying microplastics from agricultural soils that had been treated with municipal biosolids, a common fertilizer derived from wastewater treatment. They found a variety of plastic polymer types in the soil, confirming that biosolid application is a pathway for microplastic contamination of farmland. The study provides a reliable technique for tracking how microplastics cycle through agricultural environments.
Abundance and morphology of microplastics in an agricultural soil following long-term repeated application of pig manure
Microplastic abundance and morphology were characterized in pig manure and agricultural soil after 22 years of repeated manure application, finding 43.8 particles per kg in amended plots versus 16.4 in control plots. The study estimated an average annual accumulation rate of 3.5 million particles per hectare, with polymer types in soil closely matching those in the applied manure.
Distribution characteristics of microplastics in typical organic solid wastes and their biologically treated products
Researchers extracted and characterized microplastics from food waste, livestock manure, sludge, and their composted or digested products, finding MPs in all organic waste types with concentrations varying by matrix. The study highlights organic waste management pathways as an understudied route for microplastic transfer to agricultural soils.
Advances in the analysis of relevant microplastic types in agricultural soils
Researchers developed an optimized soil purification protocol for extracting and identifying microplastic particles from agricultural soils, systematically testing and combining multiple extraction and purification steps to improve the accuracy of polymer identification across different soil types.
Advances in the analysis of relevant microplastic types in agricultural soils
Researchers developed and validated an improved soil purification protocol for extracting microplastics from agricultural soils, based on systematic testing across different soil types to efficiently isolate plastic particles for polymer identification. The method built on prior work by Moller et al. (2022) and addressed the challenge that soil remains one of the most difficult matrices for microplastic analysis.
A method for the characterisation of microplastics in sludge
Researchers developed a method for detecting and characterizing microplastics in sewage sludge, which concentrates the majority of microplastics removed during wastewater treatment. This method is important because sludge is widely spread on agricultural land, making it a key pathway for microplastics entering soils.
Microplastics in soils: A comparative review on extraction, identification and quantification methods
This review compares the various methods scientists use to extract, identify, and measure microplastics in soil, highlighting the strengths and weaknesses of each approach. Soil is a particularly challenging material to work with because its organic matter and complex structure can interfere with accurate microplastic detection. The authors recommend combining multiple techniques and minimizing harsh chemical steps that could accidentally destroy the very plastic particles being measured.
An effective method for the rapid detection of microplastics in soil
A rapid and practical method was developed for detecting and identifying microplastics in soil, addressing the need for faster alternatives to existing time-consuming techniques. The method uses a combination of sieving and staining approaches to accelerate microplastic extraction and identification from soil samples.
An efficient, cost-effective, and environmentally friendly protocol for extracting microplastics from soil samples
Researchers developed an efficient, cost-effective, and environmentally friendly protocol for extracting microplastics from soil samples, addressing the lack of standardized methods and evaluating extraction performance across different soil matrices.
Method Validation: Extraction of Microplastics from Organic Fertilisers
This paper validates a standardized laboratory method for extracting microplastics from organic fertilizers such as compost, sewage sludge, and manure — materials that are widely applied to agricultural fields and are known to introduce microplastics into soils. The validated protocol uses hydrogen peroxide digestion followed by sodium iodide density separation, achieving recovery rates above 95% for particles larger than 315 micrometers. However, a secondary analysis suggested recovery rates drop significantly for particles smaller than 250 micrometers, highlighting a limitation. Standardized extraction methods are critical for generating comparable data on how much microplastic contamination is entering farmland through organic amendments.
Quantification of Microplastics in Soils Using Accelerated Solvent Extraction: Comparison with a Visual Sorting Method
Researchers evaluated accelerated solvent extraction as an alternative to visual sorting for quantifying microplastics in soil, finding it recovered similar total amounts but with some differences by polymer type. Improving the accuracy and efficiency of soil microplastic measurement is essential for understanding agricultural and terrestrial plastic contamination.
Identifying an accurate and efficient approach to soil organic matter removal for quantifying microplastics in agricultural soils
Researchers evaluated multiple soil organic matter removal strategies for microplastic extraction from agricultural soils, comparing their efficiency in decomposing organic interference while preserving microplastic integrity. The study identifies an optimal approach that balances thorough SOM removal with minimal microplastic degradation, supporting more accurate quantification in contaminated agricultural samples.
Evidence of microplastic accumulation in agricultural soils from sewage sludge disposal
Agricultural soils from 31 fields with different sludge application histories were analyzed for microplastics, finding significant accumulation in fields with repeated sludge applications and a positive correlation between application frequency and plastic particle counts. The study provides direct field evidence that sewage sludge fertilization is a major pathway for microplastic accumulation in agricultural soil.
Screening for microplastics in agricultural soils: Applying green chemistry principles in extraction and analysis
Researchers developed an environmentally friendly method for extracting and analyzing microplastics in agricultural soils using green chemistry principles. The approach achieved recovery rates exceeding 69% for smaller particles and over 91% for larger ones while minimizing reagent use and waste, and detected both mesoplastics and microplastics predominantly composed of polyethylene and polypropylene in tested soil samples.
Extraction and Characterization of Microplastics in Soil: A Case Study from the Hetao Irrigation District
Researchers developed a refined extraction method combining two-step density separation with NaCl solution, hydrogen peroxide digestion, and a fractionated filtration method to accurately isolate and characterize microplastics across multiple size ranges from agricultural soils in the Hetao Irrigation District, China.
Are microplastics in livestock and poultry manure an emerging threat to agricultural soil safety?
This review examines the overlooked problem of microplastics in livestock and poultry manure, which enters agricultural soil when manure is used as fertilizer. Manure processing can actually make microplastics smaller, rougher, and more numerous, and the particles often carry additional pollutants like heavy metals, antibiotics, and pathogens. This creates a concerning cycle where microplastics from animal feed and farm equipment contaminate manure, which then introduces these particles directly into cropland and the food supply.
Extraction and identification methods of microplastics and nanoplastics in agricultural soil: A review
This review assessed extraction and identification methods for microplastics and nanoplastics in agricultural soils, comparing density separation, chemical digestion, and spectroscopic identification approaches, and recommending method standardization to enable cross-study comparisons of soil MP contamination.
Influences of land use and depth profile on the characteristics of microplastics in agricultural soils
Researchers examined how land use and soil depth profile influence microplastic characteristics in agricultural soils, finding that wastewater and sludge application, plastic mulching, and atmospheric deposition are key sources, and that MP type and abundance vary with soil management practice and depth, highlighting the importance of vertical distribution in soil MP studies.
Microplastic contamination in sewage sludge: Abundance, characteristics, and impacts on the environment and human health
This review focuses on microplastics found in sewage sludge, which is often spread on agricultural land as fertilizer. The practice introduces microplastics directly into farm soil, where they can be taken up by crops or leach into groundwater. This creates a pathway for microplastics to reach human food and drinking water, raising concerns about the safety of using sewage sludge in agriculture.