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Extraction of Polyethylene and Polypropylene Microplastic from Agriculture Soil
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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.
The rapid population growth worldwide is intensifying the pressure on the agricultural sector. Concurrently, significant climate changes and the increasing load of soil pollutants are creating formidable challenges for agroecosystems, adversely affecting crop productivity and quality. Microplastics are among the most pervasive pollutants, having already infiltrated all terrestrial and aquatic environments. The rising concentration of microplastics in soil significantly impacts crop plant growth and yield. This study elaborates on the presence of microplastics in soil and their effects on soil quality and plant growth. It demonstrates that microplastics alter the soil's biophysical properties, such as water-holding capacity, bulk density, aeration, texture, and microbial composition. Furthermore, microplastics interact with various pollutants, including polyaromatic hydrocarbons and heavy metals, increasing their bioavailability to crops. The study also provides detailed insights into current techniques for the isolation and identification of soil microplastics, addressing key challenges and highlighting research gaps. This comprehensive analysis and comparison of interconnected aspects aim to provide a deeper understanding of all research perspectives on microplastics in agroecosystems.
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A modified methodology for extraction and quantification of microplastics in soil
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Researchers developed and validated an improved methodology for extracting and quantifying microplastics from soil samples using optimized density separation with different salt solutions. The method achieved high recovery rates for various polymer types and particle sizes while minimizing organic matter interference. The study provides a standardized and reproducible analytical approach that could help address inconsistencies in how microplastics are measured across different soil studies.
Upgraded Protocol for Microplastics’ Extraction from the Soil Matrix by Sucrose Density Gradient Centrifugation
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Extracting microplastics from soil is technically difficult because soil contains dense organic matter and particles that look similar to plastic under analysis. This study refined a sucrose density gradient centrifugation method to more cleanly separate microplastics from soil, improving recovery rates while reducing contamination from non-plastic material. A reliable soil extraction protocol is essential for accurately measuring how much microplastic pollution has accumulated in agricultural and urban land.
Density separation of soils as sample preparation for the determination of plastics
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This study developed and evaluated a density separation technique for extracting plastic particles from soil samples, enabling more reliable quantification of microplastics in terrestrial environments. Researchers found that optimizing the separation solution density improved recovery rates for a range of common polymer types.
Advances in the analysis of relevant microplastic types in agricultural soils
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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.
Microplastics accumulation in agricultural soil: Evidence for the presence, potential effects, extraction, and current bioremediation approaches
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This review examines the accumulation of microplastics in agricultural soils from sources like plastic mulching and irrigation, discussing their effects on soil properties and crop growth, along with current bioremediation approaches for removing soil microplastics.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.