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Abundance and characteristics of microplastics in soils with different agricultural practices: Importance of sources with internal origin and environmental fate

Kim, Seung-Kyu, Kim, Ji-Su, Lee, Hwang, Lee, Hee-Jee·2021·Journal of Hazardous Materials

Abstract

Despite intensive use of plastics in agriculture, little is known about the occurrence of microplastics (MPs) in agro-environment. To identify the effect of internal sources and environmental fate on MP appearance in farmland, we examined four soil types with different agricultural practices representing either direct application of polyethylene (PE) film-the inside (GS-in) and outside (GS-out) soils of greenhouse and mulch-film use soils (MS)-or rare use of plastics (rice-paddy soils; RS). MP abundance was 10-7630 items kg-1, with the order of GS-in, GS-out, RS, and MS. Besides the highest MP abundance, rare PE-sheet (4% of MPs) and increased MP abundance with sizes decreasing were unique for GS-in, implying the presence of internal sources other than PE-film and continued MP accumulation. Contrarily, in other outside soils high PE-sheet appearance (10-31%) indicated substantial input via fragmentation of applied PE-film (for GS-out and MS) or via surface-runoff (for RS) while drastic decline of small-sized MPs in order of MS > RS > GS-out than expected from steady-state fragmentation implied significant removal of MPs by surface runoff and/or infiltration. Our results suggest the importance of internal sources and environmental fate as significant factors affecting the occurrence of MPs in agricultural soils.

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Metadata

Authors
Kim, S.-K., Kim, J.-S., Lee, H., & Lee, H.-J.
Venue
Journal of Hazardous Materials
Publisher
Elsevier BV
Published
2021-02
Volume
403
Pages
123997
ISSN
0304-3894 (ISSN-L)
OpenAlex
W3087587687
Cited by
303
References
61
FWCI
6.99
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Abundance and characteristics of microplastics in soils with different agricultural practices: Importance of sources with internal origin and environmental fate. https://app.cochat.ai/papers/10.1016/j.jhazmat.2020.123997
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Kim, S.-K., Kim, J.-S., Lee, H., & Lee, H.-J. (2021). Abundance and characteristics of microplastics in soils with different agricultural practices: Importance of sources with internal origin and environmental fate. Journal of Hazardous Materials. https://doi.org/10.1016/j.jhazmat.2020.123997

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