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Detection Methods
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Microplastics in agricultural soils: Extraction and characterization after different periods of polythene film mulching in an arid region
The Science of The Total Environment2020
256 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 45
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Wenfeng Li,
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Wenfeng Li,
Rehemanjiang Wufuer,
Wenfeng Li,
Wenfeng Li,
Wenfeng Li,
Wenfeng Li,
Wenfeng Li,
Wenfeng Li,
Yongming Luo
Yongming Luo
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Rehemanjiang Wufuer,
Wenfeng Li,
Wenfeng Li,
Shuzhi Wang,
Shuzhi Wang,
Jia Duo,
Jia Duo,
Jia Duo,
Jia Duo,
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Wenfeng Li,
Yongming Luo
Xiangliang Pan,
Wenfeng Li,
Wenfeng Li,
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Jia Duo,
Yongming Luo
Rehemanjiang Wufuer,
Rehemanjiang Wufuer,
Rehemanjiang Wufuer,
Rehemanjiang Wufuer,
Daoyong Zhang,
Wenfeng Li,
Rehemanjiang Wufuer,
Daoyong Zhang,
Shuzhi Wang,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Jia Duo,
Jia Duo,
Jia Duo,
Shuzhi Wang,
Shuzhi Wang,
Shuzhi Wang,
Shuzhi Wang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Rehemanjiang Wufuer,
Rehemanjiang Wufuer,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Xiangliang Pan,
Yongming Luo
Yongming Luo
Yongming Luo
Xiangliang Pan,
Daoyong Zhang,
Daoyong Zhang,
Yongming Luo
Yongming Luo
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Wenfeng Li,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Shuzhi Wang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Yongming Luo
Daoyong Zhang,
Daoyong Zhang,
Daoyong Zhang,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Yongming Luo
Daoyong Zhang,
Daoyong Zhang,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Daoyong Zhang,
Xiangliang Pan,
Daoyong Zhang,
Daoyong Zhang,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Yongming Luo
Daoyong Zhang,
Yongming Luo
Yongming Luo
Yongming Luo
Daoyong Zhang,
Yongming Luo
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Wenfeng Li,
Yongming Luo
Yongming Luo
Yongming Luo
Xiangliang Pan,
Yongming Luo
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Yongming Luo
Xiangliang Pan,
Xiangliang Pan,
Yongming Luo
Xiangliang Pan,
Yongming Luo
Yongming Luo
Summary
Researchers developed a new method to extract microplastics from agricultural soil and found that fields mulched with plastic film for 30 years had the highest microplastic concentrations, at 40 mg per kilogram of soil, with particle size decreasing as the years of mulching increased. The study highlights the long-term accumulation of microplastics in soils under continuous plastic film agriculture.
Plastic film mulching has been extensively used in farmland, especially in arid regions, for over half-century. However, this has led to heavy pollution of soils by microplastics (MPs). Currently, efficient extraction of MPs from the organo-mineral soil matrix is a problem because microsize clay particles tightly adhere to MPs. It is therefore extremely challenging to investigate, identify, quantify, and characterize MP particles and their behavior in agricultural soils. In this study, we developed a simple and effective method of separating and extracting MPs from the soil matrix. Clean polyethylene (PE) MPs were obtained after a series of treatments including pressure leaching, flotation, electrostatic adsorption, and concentrated sulfuric acid (98% HSO) carbonization. The characteristics of MP pollutants, such as abundance, size, and morphology, in soils that have been continuously mulched with PE film for various periods of time were determined after extraction. The highest abundance of MPs (40.35 mg/kg) with sizes ranging from 0.9-2.0 mm was found in soil samples that had been continuously mulched with plastic film for 30 years. The sampled MP particles are in the microplastic size (0.8-0.3 mm) range, and the size of MPs decreases gradually as the period of mulching increased. Scanning electron microscopy analysis showed that the surface of the MP particles showed visible cracks, with round holes, and the particle surface roughened as the number of years of continuous mulching increased. Fourier-transform infrared spectroscopy results showed that the absorption peak area of hydrocarbyl (-CH) of PE MPs decreased significantly, and the typical oxidation characteristic peak area increased as the mulching period increased. The concentration of mesoplastics also increased, from 91.20 mg/kg to 308.50 mg/kg, when the mulching period increased from 5 to 30 years.