Microplastics in the soil environment: Occurrence, risks, interactions and fate – A review

Xu, Baile; Liu, Fei; Cryder, Zachary; Huang, Dan; Lu, Zhijiang; He, Yan; Wang, Haizhen; Lü, Zhenmei; Brookes, Philip C.; Tang, Caixian; Gan, Jay; Xu, Jia‐Zhuang

doi:10.1080/10643389.2019.1694822

Cited by 437 publications

(184 citation statements)

References 196 publications

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“…Thus far, the effects of MPs on terrestrial plants are unknown, particularly under soil culture conditions [11]. The mechanisms by which MPs exert toxicity in plants have been explored using solution culture experiments.…”

Section: Plant Biomassmentioning

confidence: 99%

“…A series of studies have confirmed the occurrence of MPs in agricultural soils [9][10][11]. The occurrence of MPs in soils may effect soil-dwelling microbes, animals, and plants, posing potential threats to agroecosystems [9,11,12]. Microplastics can alter soil structure and properties and plant performance, thus disrupting the resident microbial community [6,9,11].…”

Section: Introductionmentioning

confidence: 96%

“…Microplastics can enter soils through various pathways, such as the application of biosolids [4,7], organic fertilizers [8], and the use of plastic mulch films [9]. A series of studies have confirmed the occurrence of MPs in agricultural soils [9][10][11]. The occurrence of MPs in soils may effect soil-dwelling microbes, animals, and plants, posing potential threats to agroecosystems [9,11,12].…”

Section: Introductionmentioning

confidence: 99%

“…The occurrence of MPs in soils may effect soil-dwelling microbes, animals, and plants, posing potential threats to agroecosystems [9,11,12]. Microplastics can alter soil structure and properties and plant performance, thus disrupting the resident microbial community [6,9,11]. However, research gaps exist on the ecological impacts and toxicity of MPs in agroecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Wang

Zhang

et al. 2020

Toxics

175

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Microplastics (MPs) occur widely in terrestrial ecosystems. However, information on the interaction of MPs with metals in terrestrial ecosystems is lacking in the literature. The present study investigated the effects of two types of MPs (high-density polyethylene (HDPE) and polystyrene (PS)) with different dosages (i.e., 0, 0.1%, 1%, and 10%) on the uptake and effects of Cd in maize plants grown in an agricultural soil. Results showed that addition of Cd at a 5 mg/kg caused inhibited plant growth and resulted in high Cd accumulation in plant tissues. Polyethylene alone showed no significant phytotoxic effects, but a high-dose of HDPE (10%) amplified Cd phytotoxicity. Polystyrene negatively affected maize growth and phytoxicity further increased in the presence of Cd. Both HDPE and PS caused soil diethylenetriaminepentaacetic acid (DTPA)-extractable Cd concentrations to increase but did not significantly affect Cd uptake into plant tissues. In the soil without Cd addition, HDPE decreased soil pH, while PS did not significantly alter soil pH. However, in the soil spiked with Cd, both HDPE and PS increased pH. Overall, impacts on plant growth and Cd accumulation varied with MP type and dose, and PS induced substantial phytotoxicity. In conclusion, co-occurring MPs can change Cd bioavailability, plant performance, and soil traits. Our findings highlight the ecological impacts that could occur from the release of MPs into soil.

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Section: Plant Biomassmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Wang

Zhang

et al. 2020

Toxics

175

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“…An important process that has been under-researched in microplastic-affected soils is the emission of greenhouse gases 14 . Despite its potential importance, compared to other factors of global change, we have so far only scratched the surface in terms of assessing microplastic impacts on soil properties and processes in general [15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Microplastic fibers affect dynamics and intensity of CO₂and N₂O fluxes from soil differently

Rillig

Hoffmann

Lehmann

et al. 2020

Preprint

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Microplastics may affect soil ecosystem functioning in critical ways, with previously documented effects including changes in soil structure and water dynamics; this suggests that microbial populations and the processes they mediate could also be affected. Given the importance for global carbon and nitrogen cycle and greenhouse warming potential, we here experimentally examined potential effects of plastic microfiber additions on CO2 and N2O greenhouse gas fluxes. We carried out a fully factorial laboratory experiment with the factors presence of microplastic fibers (0.4% w/w) and addition of urea fertilizer (100 mg N kg−1). The conditions in an intensively N-fertilized arable soil were simulated by adding biogas digestate at the beginning of the incubation to all samples. We continuously monitored CO2 and N2O emissions from soil before and after urea application using a custom-built flow-through steady-state system, and we assessed soil properties, including soil structure. Microplastics affected soil properties, notably increasing soil aggregate water-stability and pneumatic conductivity, and caused changes in the dynamics and overall level of emission of both gases, but in opposite directions: overall fluxes of CO2 were increased by microplastic presence, whereas N2O emission were decreased, a pattern that was intensified following urea addition. This divergent response is explained by effects of microplastic on soil structure, with the increased air permeability likely improving O2 supply: this will have stimulated CO2 production, since mineralization benefits from better aeration. Increased O2 would at the same time have inhibited denitrification, a process contributing to N2O emissions, thus likely explaining the decrease in the latter. Our results clearly suggest that microplastic consequences for greenhouse gas emissions should become an integral part of future impact assessments, and that to understand such responses, soil structure should be assessed.

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Plastic Mulch‐Derived Microplastics in Agricultural Soil Systems

Ramanayaka

Zhang

Semple

2023

Microplastics in the Ecosphere

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Microplastics in the soil environment: Occurrence, risks, interactions and fate – A review

Cited by 437 publications

References 196 publications

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Microplastic fibers affect dynamics and intensity of CO₂and N₂O fluxes from soil differently

Plastic Mulch‐Derived Microplastics in Agricultural Soil Systems

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Microplastics in the soil environment: Occurrence, risks, interactions and fate – A review

Cited by 437 publications

References 196 publications

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Microplastic fibers affect dynamics and intensity of CO2and N2O fluxes from soil differently

Plastic Mulch‐Derived Microplastics in Agricultural Soil Systems

Contact Info

Product

Resources

About

Microplastic fibers affect dynamics and intensity of CO₂and N₂O fluxes from soil differently